jswizzle3737/ontario_laws_and_regs huggingface dataset:
Notes to Table 9.26.3.1.:
9.26.5.1. Required Eave Protection (1) Except as provided in Sentence (2), eave protection shall be provided on shingle, shake or tile roofs, extending from the edge of the roof a minimum of 900 mm up the roof slope to a line not less than 300 mm inside the inner face of the exterior wall. (2) Eave protection is not required, (a) over unheated garages, carports and porches, (b) where the roof overhang exceeds 900 mm measured along the roof slope from the edge of the roof to the inner face of the exterior wall, (c) on roofs of asphalt shingles installed in accordance with Subsection 9.26.8., (d) on roofs with slopes of 1 in 1.5 or greater, or (e) in regions with 3 500 or fewer degree-days.
Notes to Table 9.26.3.1.:
9.26.5.2. Materials (1) Eave protection shall be laid beneath the starter strip and shall consist of, (a) No. 15 asphalt-saturated felt laid in two plies lapped 480 mm and cemented together with lap cement, (b) Type M or S roll roofing laid with not less than 100 mm head and end laps cemented together with lap cement, (c) glass fibre or polyester fibre coated base sheets, or (d) self-sealing composite membranes consisting of modified bituminous coated material. 9.26.6. Underlay Beneath Shingles
Notes to Table 9.26.3.1.:
9.26.6.1. Materials (1) Except as required in Sentence (2), when underlay is used beneath shingles, it shall be, (a) asphalt-saturated sheathing paper weighing not less than 0.195 kg/m², or (b) No. 15 plain or perforated asphalt-saturated felt. (2) Underlay used beneath wood shingles shall be breather type.
Notes to Table 9.26.3.1.:
9.26.6.2. Installation (1) When used with shingles, underlay shall be installed parallel to the eaves with head and end lap of not less than 50 mm. (2) The top edge of each strip referred to in Sentence (1) shall be fastened with sufficient roofing nails to hold it in place until the shingles are applied. (3) The underlay referred to in Sentence (1) shall overlap the eave protection by not less than 100 mm. 9.26.7. Asphalt Shingles on Slopes of 1 in 3 or Greater
Notes to Table 9.26.3.1.:
9.26.7.1. Coverage (1) Coverage shall be not less than two thicknesses of shingle over the entire roof, disregarding cutouts.
Notes to Table 9.26.3.1.:
9.26.7.2. Starter Strip (1) A starter strip shall be installed along the lower edge of the roof so that it extends approximately 12 mm beyond the eaves and rake of the roof and fastened along the bottom edge with nails spaced not more than 300 mm o.c. (2) Starter strips shall be, (a) at least Type M mineral-surfaced roll roofing not less than 300 mm wide, (b) shingles of the same weight and quality as those used as a roof covering with tabs facing up the roof slope, or (c) pre-manufactured starter strips installed with sealant at the eaves. (3) Starter strips need not be provided where eave protection of not less than Type M mineral-surfaced roll roofing is provided or self-sealing composite membranes consisting of polyethylene and bituminous material is provided.
Notes to Table 9.26.3.1.:
9.26.7.3. Head Lap (1) Shingles shall have a head lap of not less than 50 mm.
Notes to Table 9.26.3.1.:
9.26.7.4. Fasteners (1) Except as provided in Sentence (2), shingles shall be fastened with at least four nails or staples for 1 000 mm wide shingles so that no nails or staples are exposed. (2) Where staples with an 11 mm crown are used, shingles shall be fastened with at least six staples. (3) Fasteners may be reduced for narrower shingles in proportion to the width of the shingle or when shingles incorporating interlocking devices are used. (4) Fasteners referred to in Sentences (1) and (2) shall be located 25 mm to 40 mm from each end of each strip shingle with other fasteners equally spaced between them. (5) Fasteners referred to in Sentences (1) and (2) shall be located not less than 12 mm above the tops of the cutouts.
Notes to Table 9.26.3.1.:
9.26.7.5. Securing of Tabs (1) Shingle tabs shall be secured by a spot of plastic cement not exceeding 25 mm diam under the centre of each tab or by interlocking devices or self-sealing strips.
Notes to Table 9.26.3.1.:
9.26.7.6. Hips and Ridges (1) Shingles on hips and ridges shall be applied so they extend not less than 100 mm on either side of the hip or ridge, and shall be lapped not less than 150 mm. (2) Shingles referred to in Sentence (1) shall be fastened with nails or staples on each side located not more than 25 mm from the edge and 25 mm above the butt of the overlying shingle.
Notes to Table 9.26.3.1.:
9.26.7.7. Eave Protection (1) Eave protection shall conform to Subsection 9.26.5.
Notes to Table 9.26.3.1.:
9.26.7.8. Flashing (1) Flashing shall conform to Subsection 9.26.4. 9.26.8. Asphalt Shingles on Slopes of Less Than 1 in 3
Notes to Table 9.26.3.1.:
9.26.8.1. Coverage (1) Except for the first two courses, coverage shall be not less than three thicknesses of shingle over the entire roof, disregarding cutouts.
Notes to Table 9.26.3.1.:
9.26.8.2. Starter Strip (1) A starter strip shall be installed as in Article 9.26.7.2. (2) Starter strips required in Sentence (1) shall be laid in a continuous band of cement not less than 200 mm wide.
Notes to Table 9.26.3.1.:
9.26.8.3. Securing of Tabs (1) Shingle tabs shall be secured with cold application cement applied at the rate of not less than 0.5 L/m² of cemented area, or hot application asphalt applied at the rate of 1 kg/m² of cemented area.
Notes to Table 9.26.3.1.:
9.26.8.4. Securing of Shingle Courses (1) The first course of shingles shall be secured by a continuous band of cement along the eaves applied so that the width of the band equals the shingle exposure plus 100 mm. (2) The succeeding courses of shingles shall be secured by a continuous band of cement applied so that the width of the band equals the shingle exposure plus 50 mm. (3) The band required in Sentence (2) shall be located not more than 50 mm above the butt of the overlying course of shingles.
Notes to Table 9.26.3.1.:
9.26.8.5. Hips and Ridges (1) Shingles on hips and ridges shall be not less than 300 mm wide applied to provide triple coverage. (2) Shingles referred to in Sentence (1) shall be cemented to the roof shingles and to each other with a coat of cement and fastened with nails or staples located 40 mm above the butt of the overlying shingle and 50 mm from each edge.
Notes to Table 9.26.3.1.:
9.26.8.6. Flashing (1) Flashing shall conform to Subsection 9.26.4.
Notes to Table 9.26.3.1.:
9.26.8.7. Fastening (1) Shingles shall be fastened in accordance with Article 9.26.7.4. 9.26.9. Wood Roof Shingles
Notes to Table 9.26.3.1.:
9.26.9.1. Decking (1) Decking for wood shingled roofs may be continuous or spaced.
Notes to Table 9.26.3.1.:
9.26.9.2. Grade (1) Western cedar shingles shall be not less than No. 2 grade. (2) Eastern white cedar shingles shall be not less than B (clear) grade.
Notes to Table 9.26.3.1.:
9.26.9.3. Size (1) Wood shingles shall be not less than 400 mm long and not less than 75 mm nor more than 350 mm wide.
Notes to Table 9.26.3.1.:
9.26.9.4. Spacing and Joints (1) Shingles shall be spaced approximately 6 mm apart and offset at the joints in adjacent courses not less than 40 mm so that joints in alternate courses are staggered.
Notes to Table 9.26.3.1.:
9.26.9.5. Fastening (1) Shingles shall be fastened with two nails or staples located approximately 20 mm from the sides of the shingle and 40 mm above the exposure line.
Notes to Table 9.26.3.1.:
9.26.9.6. Exposure (1) The exposure of wood roof shingles shall conform to Table 9.26.9.6. Table 9.26.9.6.   Exposure of Wood Shingles Forming Part of Sentence 9.26.9.6.(1) Item   Column 1   Column 2   Column 3   Column 4   Column 5   Column 6   Column 7 

      Roof Slope   Maximum Exposure, mm                 

          No. 1 or A Grade Length of Shingle, mm   No. 2 or B Grade Length of Shingle, mm 

          400   450    600   400   450   600 

  1.   <1 in 3   100   115   165   90   100   140 

  2.   ≥1 in 3   125   140   190   100   115   165
Notes to Table 9.26.3.1.:
9.26.9.7. Flashing (1) Flashing shall conform to Subsection 9.26.4.
Notes to Table 9.26.3.1.:
9.26.9.8. Eave Protection (1) Eave protection shall conform to Subsection 9.26.5. 9.26.10. Cedar Roof Shakes
Notes to Table 9.26.3.1.:
9.26.10.1. Size and Thickness (1) Shakes shall be not less than 450 mm long and not less than 100 mm nor more than 350 mm wide with a butt thickness of not more than 32 mm and not less than 9 mm.
Notes to Table 9.26.3.1.:
9.26.10.2. Underlay (1) Where eave protection is not provided, an underlay conforming to the requirements in Article 9.26.6.1. for wood shingles shall be laid as a strip not less than 900 mm wide along the eaves. (2) A strip of material similar to that described in Sentence (1) not less than 450 mm wide shall be interlayed between each course of shakes with the bottom edge of the strip positioned above the butt line at a distance equal to double the exposure of the shakes. (3) Interlayed strips in Sentence (2) shall be lapped at least 150 mm at hips and ridges in a manner that will prevent water from reaching the roof sheathing.
Notes to Table 9.26.3.1.:
9.26.10.3. Spacing and Joints (1) Shakes shall be spaced 6 mm to 9 mm apart and the joints in one course shall be separated not less than 40 mm from joints in adjacent courses.
Notes to Table 9.26.3.1.:
9.26.10.4. Fastening (1) Shakes shall be fastened with nails located approximately 20 mm from the sides of the shakes and 40 mm above the exposure line.
Notes to Table 9.26.3.1.:
9.26.10.5. Exposure (1) The exposure of wood shakes shall not exceed, (a) 190 mm for shakes not less than 450 mm long, and (b) 240 mm for shakes not less than 600 mm long.
Notes to Table 9.26.3.1.:
9.26.10.6. Flashing (1) Flashing shall conform to Subsection 9.26.4.
Notes to Table 9.26.3.1.:
9.26.10.7. Eave Protection (1) Eave protection shall conform to Subsection 9.26.5.
Notes to Table 9.26.3.1.:
9.26.10.8. Grade (1) Shakes shall be not less than No. 1 or Handsplit grade. 9.26.11. Built-Up Roofs
Notes to Table 9.26.3.1.:
9.26.11.1. Quantity of Materials (1) The quantities of bituminous materials used on built-up roofs shall conform to Table 9.26.11.1. Table 9.26.11.1.   Quantities of Bitumen for Built-Up Roofs Forming Part of Sentence 9.26.11.1.(1) Item   Column 1   Column 2   Column 3 

      Type of Roof   Amount of Bitumen per Square Metre of Roof Surface 

          Mopping Coats Between Layers   Flood Coat 

  1.   Asphalt and aggregate   1 kg   3 kg 

  2.   Coal-tar and aggregate   1.2 kg   3.6 kg 

  3.   Cold process roofing   0.75 L cold process cement   2 L cold process top coating
Notes to Table 9.26.3.1.:
9.26.11.2. Coal-Tar and Asphalt Products (1) Coal-tar products and asphalt products shall not be used together in built-up roof construction.
Notes to Table 9.26.3.1.:
9.26.11.3. Roof Felts (1) Bitumen roofing felts shall be not less than No.15 felt.
Notes to Table 9.26.3.1.:
9.26.11.4. Aggregate Surfacing (1) Aggregate used for surfacing built-up roofs shall be clean, dry and durable and shall consist of particles of gravel, crushed stone or air-cooled blast furnace slag having a size of from 6 mm to 15 mm. (2) The minimum amount of aggregate surfacing per square metre of roof surface shall be 15 kg gravel or crushed stone or 10 kg crushed slag.
Notes to Table 9.26.3.1.:
9.26.11.5. Flashing (1) Flashing shall conform to Subsection 9.26.4.
Notes to Table 9.26.3.1.:
9.26.11.6. Number of Layers (1) Built-up roofing shall consist of at least three mopped-down layers of roofing felt flood coated with bitumen.
Notes to Table 9.26.3.1.:
9.26.11.7. Installation of Layers (1) In hot process applications, each layer of bitumen-saturated felt shall be laid while the bitumen is hot, with each layer overlapping the previous one. (2) The full width under each lap referred to in Sentence (1) shall be coated with bitumen so that in no place does felt touch felt. (3) Felt shall be laid free of wrinkles and shall be rolled directly into the hot bitumen and broomed forward and outward from the centre to ensure complete adhesion.
Notes to Table 9.26.3.1.:
9.26.11.8. Roofing over Wood-Based Sheathing (1) Except as permitted in Sentence (2), built-up roofing applied over wood, plywood, OSB or waferboard roof sheathing shall be laid over an additional base layer of felt laid dry over the entire roof deck with at least a 50 mm headlap and a 50 mm sidelap between each sheet. (2) Where plywood, OSB or waferboard roof sheathing is used, the dry layer of felt required in Sentence (1) may be omitted when the joints are taped and the sheathing is primed with asphalt.
Notes to Table 9.26.3.1.:
9.26.11.9. Attachment to Decking (1) Roofing shall be securely attached to the decking or where insulation is applied above the deck, the insulation shall be securely attached to the deck before the first layer of felt is fastened to the insulation.
Notes to Table 9.26.3.1.:
9.26.11.10. Cant Strips (1) Except as permitted in Sentence (4), a cant strip shall be provided at the edges of roofs. (2) No fewer than two plies of the roofing membrane shall be carried over the top of the cant strip. (3) Flashing shall extend over the top of the cant strip and be shaped to form a drip. (4) The cant strip required in Sentence (1) may be omitted where a gravel stop is provided at the edge of roofs. (5) The roofing membranes shall be carried over the edge of the roof before the gravel stop referred to in Sentence (4) is fastened and two plies of roofing membrane mopped to the top surface of the gravel stop before the flood coat is applied. (6) The gravel stop referred to in Sentence (4) shall extend over the edge of the roof to form a drip or shall be flashed so that the flashing extends over the edge to form a drip. 9.26.12. Selvage Roofing
Notes to Table 9.26.3.1.:
9.26.12.1. Double Coverage (1) Wide selvage asphalt roofing shall provide double coverage over the entire roof surface.
Notes to Table 9.26.3.1.:
9.26.12.2. Joints (1) Plies of selvage roofing shall be cemented together to ensure a water-tight joint. 9.26.13. Sheet Metal Roofing
Notes to Table 9.26.3.1.:
9.26.13.1. Thickness (1) Sheet metal roofing shall be not less than, (a) 0.33 mm thick galvanized steel, (b) 0.46 mm thick copper, (c) 0.46 mm thick zinc, or (d) 0.48 mm thick aluminum.
Notes to Table 9.26.3.1.:
9.26.13.2. Support (1) Where sheet metal roofing is not supported by roof decking but spans between spaced supports, the panels shall be designed to support the specified live loads for roofs. 9.26.14. Glass Reinforced Polyester Roofing
Notes to Table 9.26.3.1.:
9.26.14.1. Support (1) Where glass reinforced polyester roofing panels are not supported by roof decking but span between spaced supports, the panels shall be designed to support the specified roof loads. 9.26.15. Hot Applied Rubberized Asphalt Roofing
Notes to Table 9.26.3.1.:
9.26.15.1. Installation (1) Hot applied rubberized asphalt roofing shall be installed in accordance with CAN/CGSB-37.51-M, “Application for Hot Applied Rubberized Asphalt for Roofing and Waterproofing”. 9.26.16. Polyvinyl Chloride Sheet Roofing
Notes to Table 9.26.3.1.:
9.26.16.1. Installation (1) Polyvinyl chloride sheet applied roofing membrane shall be installed in accordance with CGSB 37-GP-55M, “Application of Sheet Applied Flexible Polyvinyl Chloride Roofing Membrane”. 9.26.17. Concrete Roof Tiles
Notes to Table 9.26.3.1.:
9.26.17.1. Installation (1) Concrete roof tiles shall be installed according to CAN/CSA-A220.1-M, “Installation of Concrete Roof Tiles”. 9.26.18. Roof Drains and Downspouts
Notes to Table 9.26.3.1.:
9.26.18.1. Roof Drains (1) When roof drains are provided they shall conform to Part 7.
Notes to Table 9.26.3.1.:
9.26.18.2. Downspouts (1) Where downspouts are provided and are not connected to a sewer, extensions shall be provided to carry rainwater away from the building
in a manner that will prevent soil erosion. Section 9.27. Cladding 9.27.1. Application
Notes to Table 9.26.3.1.:
9.27.1.1. General (1) Where lumber, wood shingles, shakes, fibre-cement shingles, planks and sheets, plywood, OSB, waferboard, hardboard, vinyl, aluminum and steel, including trim and soffits, are installed as cladding on wood frame walls exposed to precipitation, the cladding assembly shall comply with, (a) Subsections 9.27.2. to 9.27.12., or (b) Part 5. (2) Where stucco is installed as cladding on wood frame or masonry walls exposed to precipitation, the cladding assembly shall comply with, (a) Subsections 9.27.2. to 9.27.4., and Section 9.28., or (b) Part 5. (3) Where masonry serves as cladding on wood frame or masonry walls exposed to precipitation, the cladding assembly shall comply with, (a) Subsections 9.27.2. to 9.27.4., and Section 9.20., or (b) Part 5. (4) Where asphalt shingles are installed as cladding on wood frame walls exposed to precipitation, the cladding assembly shall comply with, (a) Subsections 9.26.7. and 9.27.2. to 9.27.4., or (b) Part 5. (5) Where an exterior insulation finish system is installed as cladding on wood-frame, masonry, cold-formed steel stud or cast-in-place concrete walls exposed to precipitation, the cladding assembly shall comply with, (a) Subsections 9.25.5., 9.27.2. to 9.27.4. and 9.27.13., or (b) Part 5. (6) Where cladding materials or systems other than those described in Sentences (1) to (5) are installed, or where these are installed on substrates other than those identified in Sentences (1) to (5), the cladding materials or systems and their installation shall comply with Part 5. 9.27.2. Required Protection from Precipitation
Notes to Table 9.26.3.1.:
9.27.2.1. Minimizing and Preventing Ingress and Damage (1) Except where exterior walls are protected from precipitation or where it can be shown that ingress will not adversely affect occupant health or safety, exterior walls shall be designed and constructed to, (a) minimize the ingress of precipitation into the assembly, and (b) prevent ingress into interior space. (2) Except where exterior walls are protected from specific mechanisms of deterioration, such as mechanical impact and ultraviolet radiation, exterior walls shall be designed and constructed to minimize the likelihood of their required performance being reduced to an unacceptable level as a result of those mechanisms.
Notes to Table 9.26.3.1.:
9.27.2.2. Minimum Protection from Precipitation Ingress (1) Exterior walls exposed to precipitation shall be protected against ingress of precipitation with an exterior cladding assembly consisting of a first plane of protection and a second plane of protection where the wall encloses spaces of residential occupancy or spaces that directly serve spaces of residential occupancy.
Notes to Table 9.26.3.1.:
9.27.2.3. First and Second Planes of Protection (1) Where walls required to provide protection from precipitation comprise assemblies with first and second planes of protection, (a) the first plane of protection shall, (i) consist of cladding, with appropriate trim, accessory pieces and fasteners, and (ii) be designed and constructed to minimize the passage of rain and snow into the wall by minimizing holes and managing precipitation ingress caused by kinetic energy of raindrops, surface tension, capillarity, gravity, and air pressure differences, (b) the second plane of protection shall be designed and constructed to, (i) intercept all precipitation that gets past the first plane of protection, and (ii) effectively dissipate any precipitation to the exterior, and (c) the protection provided by the first and second planes of protection shall be maintained at, (i) wall penetrations created by the installation of components and services such as windows, doors, ventilation ducts, piping, wiring and electrical outlets, and (ii) the interface with other wall assemblies.
Notes to Table 9.26.3.1.:
9.27.2.4. Protection of Cladding from Moisture (1) A clearance of not less than 200 mm shall be provided between finished ground and cladding that is adversely affected by moisture, such as untreated wood, plywood, OSB, waferboard and hardboard. (2) A clearance of not less than 50 mm shall be provided between a roof surface and cladding that is adversely affected by moisture, such as untreated wood, plywood, OSB, waferboard and hardboard. 9.27.3. Second Plane of Protection
Notes to Table 9.26.3.1.:
9.27.3.1. Elements of the Second Plane of Protection (1) The second plane of protection shall consist of a drainage plane with appropriate inner boundary and flashing to dissipate rainwater to the exterior. (2) The inner boundary of the drainage plane shall comply with, (a) Articles 9.27.3.2. to 9.27.3.6., or (b) Subsection 9.27.13. (3) The protection provided by the second plane of protection shall be maintained, (a) at wall penetrations created by the installation of components and services such as windows, doors, ventilation ducts, piping, wiring and electrical outlets, and (b) at the interface with other wall assemblies. (4) Flashing material and installation shall comply with Articles 9.27.3.7. and 9.27.3.8.
Notes to Table 9.26.3.1.:
9.27.3.2. Sheathing Membrane Material Standard (1) Sheathing membranes shall conform to the performance requirements of CAN/CGSB-51.32-M, “Sheathing, Membrane, Breather Type”.
Notes to Table 9.26.3.1.:
9.27.3.3. Required Sheathing Membrane and Installation (1) Except as provided in Articles 9.27.3.4. to 9.27.3.6., at least one layer of sheathing membrane shall be applied beneath siding, stucco or masonry veneer. (2) Sheathing membrane required in Sentence (1) shall be applied so that joints are lapped not less than 100 mm. (3) Where sheathing membrane required in Sentence (1) is applied horizontally, the upper sheets shall overlap the lower sheets.
Notes to Table 9.26.3.1.:
9.27.3.4. Insulating Sheathing in Lieu of Sheathing Membrane (1) Where non-wood-based rigid exterior insulating sheathing, or exterior insulating sheathing with an integral sheathing membrane is installed, a separate sheathing membrane is not required. (2) Where insulating sheathing is installed as provided in Sentence (1), (a) sheathing panels subject to moisture deterioration shall be sealed at all joints, and (b) the joints of sheathing panels not subject to moisture deterioration shall be, (i) sealed at all joints, or (ii) lapped or tongue and groove, and detailed to ensure drainage of water to the exterior.
Notes to Table 9.26.3.1.:
9.27.3.5. Sheathing Membranes in Lieu of Sheathing (1) Except as provided in Article 9.27.3.6., where no sheathing is used, at least two layers of sheathing membrane shall be applied beneath the cladding. (2) All joints in the sheathing membrane required in Sentence (1) shall occur over framing, and the membrane shall be fastened to the framing with roofing nails or staples spaced not more than 150 mm along the edges of the outer layer of sheathing paper. (3) Wall sheathing is permitted to be used in lieu of one layer of sheathing membrane required in Sentence (1), and the thickness need not conform to Table 9.23.16.2.A.
Notes to Table 9.26.3.1.:
9.27.3.6. Face Sealed Cladding (1) Sheathing membrane is permitted to be omitted beneath cladding when the joints in the cladding are formed to effectively prevent the passage of wind and rain in conformance with Sentence (2) or (3), as applicable. (2) Cladding consisting of sheets of plywood, hardboard, OSB, waferboard or fibre cement is considered to meet the requirements of Sentence (1), provided the cladding is applied so that, (a) all edges are directly supported by framing, (b) the vertical joints between adjacent sheets are sealed and, (i) covered with battens, (ii) shiplapped, or (iii) otherwise matched to provide weathertight joints, and (c) the horizontal joints between adjacent sheets are sealed and, (i) shiplapped, or (ii) otherwise matched to provide weathertight joints. (3) Metal siding consisting of sheets of metal is considered to meet the requirements of Sentence (1) where the joints between sheets are of the locked-seam type.
Notes to Table 9.26.3.1.:
9.27.3.7. Flashing Materials (1) Flashing shall consist of not less than, (a) 1.73 mm thick sheet lead, (b) 0.33 mm thick galvanized steel, (c) 0.46 mm thick copper, (d) 0.46 mm thick zinc, (e) 0.48 mm thick aluminum, or (f) 1.02 mm thick vinyl.
Notes to Table 9.26.3.1.:
9.27.3.8. Flashing Installation (1) Except as provided in Sentence (2), flashing shall be installed at, (a) every horizontal junction between claddings elements, (b) every horizontal offset in the cladding, and (c) every horizontal line where the cladding substrates change and where, (i) the substrates differ sufficiently for stresses to be concentrated along that line, or (ii) the installation of the cladding on the lower substrate may compromise the drainage of moisture from behind the cladding above. (2) Flashing need not be installed as described in Sentence (1), (a) where the upper cladding elements overlap the lower cladding elements by not less than 25 mm, (b) where, (i) the cladding above and below the joint is installed outboard of a drained and vented air space, and (ii) the horizontal detail is constructed so as to minimize ingress of precipitation into the air space, or (c) at horizontal construction joints in stucco, where, (i) the joint is finished with an expansion-contraction strip, and (ii) the cladding is installed outboard of a drained and vented air space. (3) Flashing shall be installed over exterior wall openings where the vertical distance from the bottom of the eave to the top of the trim is more than one-quarter of the horizontal overhang of the eave. (4) Flashing described in Sentences (1) and (3) shall, (a) extend not less that 50 mm upward inboard of the sheathing membrane or sheathing installed in lieu of the sheathing membrane, (b) have a slope of not less than 6% toward the exterior after the expected shrinkage of the building
frame, (c) terminate at each end with an end-dam, (i) with a height in millimetres not less than 25 mm or 1/10 of the value of the 1 in 5 driving rain wind pressure in Pa, and (ii) at the height defined in Subclause (i), extending to the face of the adjacent cladding, (d) lap not less than 10 mm vertically over the building element below, and (e) terminate in a drip extending not less than 5 mm outward from the outer face of the building
element below. (5) Where the sills of windows and doors installed in exterior walls are not self-flashing, flashing shall be installed between the underside of the window or door and the wall construction below. 9.27.4. Sealants
Notes to Table 9.26.3.1.:
9.27.4.1. Required Sealants (1) Sealant shall be provided where required to prevent the entry of water into the structure. (2) Sealant shall be provided between masonry, siding or stucco and the adjacent door and window frames or trim, including sills unless such locations are completely protected from the entry of rain. (3) Sealant shall be provided at vertical joints between different cladding materials unless the joint is suitably lapped or flashed to prevent the entry of rain.
Notes to Table 9.26.3.1.:
9.27.4.2. Materials (1) Sealants shall be, (a) non-hardening types suitable for exterior use, (b) selected for their ability to resist the effects of weathering, and (c) compatible with, and adhere to, the substrate to which they are applied. (2) Sealants shall conform to, (a) ASTM C834, “Latex Sealants”, (b) ASTM C920, “Elastomeric Joint Sealants”, (c) ASTM C1184, “Structural Silicone Sealants”, or (d) ASTM C1311, “Solvent Release Sealants”. (3) Backer rod shall conform to ASTM C1330, “Cylindrical Sealant Backing for Use with Cold Liquid-Applied Sealants”. 9.27.5. Attachment of Cladding
Notes to Table 9.26.3.1.:
9.27.5.1. Attachment (1) Except as permitted in Sentences (2), (3) and (4), cladding shall be fastened to the framing members or furring members, or to blocking between the framing members. (2) Vertical lumber and stucco lath or reinforcing are permitted to be attached to sheathing only where the sheathing consists of not less than, (a) 14.3 mm lumber, (b) 12.5 mm plywood, or (c) 12.5 mm OSB or waferboard. (3) Vertically applied metal siding and wood shingles and shakes are permitted to be attached to the sheathing only where the sheathing consists of not less than, (a) 14.3 mm lumber, (b) 7.5 mm plywood, or (c) 7.5 mm OSB or waferboard. (4) Where wood shingles or shakes are applied to sheathing that is not suitable for attaching the shingles or shakes, the shingles or shakes may be attached to a wood lath not less than 38 mm by 9.5 mm thick securely nailed to the framing and applied as described in Article 9.27.7.5. (5)-(7) Revoked: O. Reg. 88/19, s. 274 (2).
Notes to Table 9.26.3.1.:
9.27.5.2. Blocking (1) Blocking for the attachment of cladding shall be not less than 38 mm by 38 mm lumber securely nailed to the framing and spaced not more than 610 mm o.c.
Notes to Table 9.26.3.1.:
9.27.5.3. Furring (1) Except as permitted in Sentence 9.27.5.1. (4), furring for the attachment of cladding shall be not less than 19 mm by 38 mm lumber when applied over sheathing. (2) When applied without sheathing, furring referred to in Sentence (1) shall be not less than, (a) 19 mm by 64 mm lumber on supports spaced not more than 406 mm o.c., or (b) 19 mm by 89 mm on supports spaced not more than 610 mm o.c. (3) Furring referred to in Sentence (1) shall be, (a) securely fastened to the framing, and (b) spaced not more than 610 mm o.c.
Notes to Table 9.26.3.1.:
9.27.5.4. Size and Spacing of Fasteners (1) Nail or staple size and spacing for the attachment of cladding and trim shall conform to Table 9.27.5.4. Table 9.27.5.4.   Attachment of Cladding Forming Part of Sentence 9.27.5.4.(1) Item   Column 1 Type of Cladding   Column 2 Minimum Nail or Staple Length, mm   Column 3 Minimum Number of Nails or Staples   Column 4 Maximum Nail or Staple Spacing, mm (o.c.) 

  1.   Wood trim   51   ---   600 

  2.   Lumber siding or horizontal siding made from sheet metal   51   ---   600 

  3.   Metal cladding   38   ---   600 (nailed to framing) 400 (nailed to sheathing only) 

  4.   Wood shakes up to 200 mm in width   51   2   --- 

  5.   Wood shakes over 200 mm in width   51   3   --- 

  6.   Wood shingles up to 200 mm in width   32   2   --- 

  7.   Wood shingles over 200 mm in width   32   3   --- 

  8.   Panel or sheet type cladding up to 7 mm thick   38   ---   150 (along edges) 

  9.   Panel or sheet type cladding more than 7 mm thick   51   ---   300 (along intermediate supports)
Notes to Table 9.26.3.1.:
9.27.5.5. Fastener Materials (1) Nails or staples for the attachment of cladding and wood trim shall be corrosion-resistant and shall be compatible with the cladding material.
Notes to Table 9.26.3.1.:
9.27.5.6. Expansion and Contraction (1) Fasteners for metal or vinyl cladding shall be positioned to permit expansion and contraction of the cladding.
Notes to Table 9.26.3.1.:
9.27.5.7. Penetration of Fasteners (1) Fasteners for shakes and shingles shall penetrate through the nail-holding base or not less than 19 mm into the framing. (2) Fasteners for cladding other than that described in Sentence (1) shall penetrate through the nail-holding base or not less than 25 mm into the framing. 9.27.6. Lumber Siding
Notes to Table 9.26.3.1.:
9.27.6.1. Materials (1) Lumber siding shall be sound, free of knot holes, loose knots, through checks or splits.
Notes to Table 9.26.3.1.:
9.27.6.2. Thickness and Width (1) Drop, rustic, novelty, lapped board and vertical wood siding shall be not less than 14.3 mm thick and not more than 286 mm wide. (2) Bevel siding shall be, (a) not less than 5 mm thick at the top, and (b) not less than, (i) 12 mm thick at the butt for sidings 184 mm or less in width, and (ii) 14.3 mm thick at the butt for sidings wider than 184 mm. (3) Bevel siding shall be not more than 286 mm wide.
Notes to Table 9.26.3.1.:
9.27.6.3. Joints (1) Lumber siding shall prevent water from entering at the joints by the use of lapped or matched joints or by vertical wood battens. (2) Siding shall overlap not less than 1 mm per 16 mm width of lumber, but not less than, (a) 9.5 mm for matched siding, (b) 25 mm for lapped bevel siding, or (c) 12 mm for vertical battens. 9.27.7. Wood Shingles and Shakes
Notes to Table 9.26.3.1.:
9.27.7.1. Materials (1) Shingles and shakes shall conform to, (a) CSA O118.1, “Western Red Cedar Shakes and Shingles”, or (b) CSA O118.2-M, “Eastern White Cedar Shingles”. (2) Western cedar shakes shall be not less than No. 1 grade or Handsplit grade, and western cedar shingles not less than No. 2 grade, except that No. 3 grade may be used for undercoursing. (3) Eastern white cedar shakes shall be at least B (clear) grade, except that C grade may be used for undercoursing.
Notes to Table 9.26.3.1.:
9.27.7.2. Width (1) Shingles and shakes shall be not less than 65 mm or more than 350 mm wide.
Notes to Table 9.26.3.1.:
9.27.7.3. Fasteners (1) Shingles or shakes shall be fastened with nails located approximately 20 mm from each edge and not less than 25 mm above the exposure line for single-course applications, or approximately 50 mm above the butt for double-course applications.
Notes to Table 9.26.3.1.:
9.27.7.4. Offsetting of Joints (1) In single-course application, joints in succeeding courses shall be offset at least 40 mm so that joints in any two of three consecutive courses are staggered. (2) In double-course application, joints in the outer course shall be offset from joints in the under-course by not less than 40 mm, and joints in succeeding courses shall be offset not less than 40 mm.
Notes to Table 9.26.3.1.:
9.27.7.5. Fastening to Lath (1) When lath is used with double-course application (see Sentence 9.27.5.1.(4)), it shall be spaced according to the exposure and securely fastened to the framing. (2) The butts of the under-course of the application referred to in Sentence (1) shall rest on the top edge of the lath. (3) The outer course of the application referred to in Sentence (1) shall be fastened to the lath with nails of sufficient length to penetrate through the lath. (4) The butts of the shingles or shakes shall be so located that they project not less than 12 mm below the bottom edge of the lath referred to in Sentence (1). (5) If wood lath is not used, the butts of the under-course shingles or shakes of the application referred to in Sentence (1) shall be located 12 mm above the butts of the outer course.
Notes to Table 9.26.3.1.:
9.27.7.6. Exposure and Thickness (1) The exposure and butt thickness of shingles and shakes shall conform to Table 9.27.7.6. Table 9.27.7.6.   Exposure and Thickness of Wood Shingles and Shakes Forming Part of Sentence 9.27.7.6.(1) Item   Column 1   Column 2   Column 3   Column 4 

      Shake or Shingle Length, mm    Maximum Exposure, mm       Minimum Butt Thickness, mm 

          Single Coursing   Double Coursing     

  1.   400   190   305   10 

  2.   450   216   356   11 

  3.   600   292   406   13 9.27.8. Plywood
Notes to Table 9.26.3.1.:
9.27.8.1. Material Standards (1) Plywood cladding shall be exterior type conforming to, (a) ANSI/HPVA HP-1, “Hardwood and Decorative Plywood”, (b) CSA O121, “Douglas Fir Plywood”, (c) CSA O151, “Canadian Softwood Plywood”, or (d) CSA O153, “Poplar Plywood”.
Notes to Table 9.26.3.1.:
9.27.8.2. Thickness (1) Plywood cladding shall be not less than 6 mm thick when applied directly to sheathing. (2) When applied directly to framing or over furring strips, plywood cladding thickness shall conform to Table 9.27.8.2. Table 9.27.8.2.   Minimum Plywood Cladding Thickness Forming Part of Sentence 9.27.8.2.(2) Item   Column 1 Spacing of Supports, mm   Column 2 Minimum Thickness, mm, where Face Grain Parallel to Supports   Column 3 Minimum Thickness, mm, where Face Grain at Right Angles to Supports  

  1.   406   8   6 

  2.   610   11   8 (3) The thickness of grooved or textured plywood shall be measured at the point of least thickness.
Notes to Table 9.26.3.1.:
9.27.8.3. Edge Treatment (1) The edges of plywood cladding shall be treated with a suitable paint or sealer.
Notes to Table 9.26.3.1.:
9.27.8.4. Panel Cladding (1) Plywood applied in panels shall have all edges supported. (2) Not less than a 2 mm gap shall be provided between panels referred to in Sentence (1). (3) Vertical joints in cladding referred to in Sentence (1) shall be protected with batten strips or caulking when the plywood joints are not matched. (4) Horizontal joints in cladding referred to in Sentence (1) shall be lapped not less than 25 mm or shall be suitably flashed.
Notes to Table 9.26.3.1.:
9.27.8.5. Lapped Strip Siding (1) Plywood applied in horizontal lapped strips shall have not less than a 2 mm gap provided at the butted ends, which shall be caulked. (2) The horizontal joints of siding described in Sentence (1) shall be lapped not less than 25 mm. (3) Wedges shall be inserted under all vertical butt joints and at all corners when horizontal lapped plywood is applied without sheathing. 9.27.9. Hardboard
Notes to Table 9.26.3.1.:
9.27.9.1. Material Standards (1) Factory-finished hardboard cladding shall conform to CAN/CGSB-11.5M, “Hardboard, Precoated, Factory-Finished, for Exterior Cladding”. (2) Hardboard cladding that is not factory finished shall conform to Types 1, 2 or 5 in CAN/CGSB-11.3-M, “Hardboard”.
Notes to Table 9.26.3.1.:
9.27.9.2. Thickness (1) Type 1 or 2 hardboard cladding shall be not less than, (a) 6.0 mm thick when applied over sheathing that provides continuous support, and (b) 7.5 mm thick when applied to furring or framing members not more than 406 mm o.c. (2) Type 5 hardboard cladding shall be not less than 9.0 mm thick when applied over sheathing that provides continuous support or over furring or framing members spaced not more than 406 mm o.c. (3) Where hardboard cladding is grooved, the grooves shall not extend more than 1.5 mm into the minimum required thickness.
Notes to Table 9.26.3.1.:
9.27.9.3. Panel Cladding (1) Hardboard cladding applied in panels shall have all edges supported with not less than a 5 mm gap provided between sheets. (2) Vertical joints in cladding described in Sentence (1) shall be protected with batten strips or caulking when the joints are not matched. (3) Horizontal joints in cladding described in Sentence (1) shall be lapped not less than 25 mm or shall be suitably flashed.
Notes to Table 9.26.3.1.:
9.27.9.4. Lapped Strip Siding (1) Hardboard applied in horizontal lapped strips shall have not less than a 5 mm gap provided at the butted ends, which shall be caulked or otherwise protected with suitable mouldings. (2) The horizontal joints of siding described in Sentence (1) shall overlap not less than 1 mm per 16 mm width of siding board but not less than 9.5 mm for matched joint siding or 25 mm for lapped siding.
Notes to Table 9.26.3.1.:
9.27.9.5. Clearance (1) Not less than 3 mm clearance shall be provided between hardboard siding and door or window frames. 9.27.10. OSB and Waferboard
Notes to Table 9.26.3.1.:
9.27.10.1. Material Standard (1) OSB and waferboard cladding shall conform to CSA O437.0, “OSB and Waferboard”.
Notes to Table 9.26.3.1.:
9.27.10.2. Thickness (1) OSB conforming to O-2 grade shall be not less than 6.0 mm thick where applied directly to sheathing. (2) OSB conforming to O-2 grade applied directly to framing or over furring strips shall conform to the thickness shown for plywood in Table 9.27.8.2. (3) OSB conforming to O-1 grade and waferboard conforming to R-1 grade shall be not less than 7.9 mm thick where applied directly to sheathing. (4) Where applied directly to framing or over furring strips, OSB conforming to O-1 grade and waferboard conforming to R-1 grade shall be not less than, (a) 9.5 mm thick on supports spaced not more than 406 mm o.c., and (b) 12.7 mm thick on supports spaced not more than 610 mm o.c.
Notes to Table 9.26.3.1.:
9.27.10.3. Panel Cladding (1) OSB and waferboard applied in panels shall have all edges supported and treated with a primer or sealer. (2) Not less than a 3 mm gap shall be provided between sheets in cladding described in Sentence (1). (3) Vertical joints in cladding described in Sentence (1) shall be protected with batten strips or caulking when the OSB and waferboard joints are not matched. (4) Horizontal joints in cladding described in Sentence (1) shall be lapped not less than 25 mm or shall be suitably flashed.
Notes to Table 9.26.3.1.:
9.27.10.4. Clearance (1) At least a 3 mm clearance shall be provided between OSB and waferboard cladding and door or window frames. 9.27.11. Metal
Notes to Table 9.26.3.1.:
9.27.11.1. Material Standards (1) Horizontal and vertical strip steel siding, including flashing and trim accessories, shall conform to CAN/CGSB-93.4, “Galvanized Steel and Aluminum-Zinc Alloy Coated Steel Siding, Soffits and Fascia, Prefinished, Residential”. (2) Steel sheet cladding shall have a minimum thickness of 0.3 mm and conform to CAN/CGSB-93.3-M, “Prefinished Galvanized and Aluminum-Zinc Alloy Steel Sheet for Residential Use”. (3) Horizontal and vertical strip aluminum siding, including flashing and trim accessories, shall conform to CAN/CGSB-93.2-M, “Prefinished Aluminum Siding, Soffits and Fascia, for Residential Use”. (4) Aluminum sheet cladding shall conform to CAN/CGSB-93.1-M, “Sheet, Aluminum Alloy, Prefinished, Residential” and shall have a thickness of not less than 0.58 mm, except that siding supported by backing or sheathing shall have a thickness of not less than 0.46 mm. 9.27.12. Vinyl Siding
Notes to Table 9.26.3.1.:
9.27.12.1. Material Standard (1) Vinyl siding, including flashing and trim accessories, shall conform to CAN/CGSB-41.24, “Rigid Vinyl Siding, Soffits and Fascia”.
Notes to Table 9.26.3.1.:
9.27.12.2. Attachment (1) The attachment of vinyl siding shall conform to the requirements in Subsection 9.27.5. for metal siding. 9.27.13. Exterior Insulation Finish Systems
Notes to Table 9.26.3.1.:
9.27.13.1. Application (1) Except as provided in Sentence (2), this Subsection applies to exterior insulation finish systems that, (a) are covered in the scope of CAN/ULC-S716.1, “Exterior Insulation and Finish Systems (EIFS) – Materials and Systems”, and (b) have a geometrically defined drainage cavity with a minimum cavity depth of 6 mm and an open area equal to not less than 13% of the area of a full-size exterior insulation finish systems panel. (2) Exterior insulation finish systems not described in Sentence (1) and their components shall comply with Article 5.10.3.1.
Notes to Table 9.26.3.1.:
9.27.13.2. Materials (1) The materials used in exterior insulation finish systems shall conform to CAN/ULC-S716.1, “Exterior Insulation and Finish Systems (EIFS) – Materials and Systems”. (2) The substrate on which an exterior insulation finish system is installed shall, (a) be compatible with that particular system, and (b) comply with the structural requirements for sheathing materials set out in Section 9.23.
Notes to Table 9.26.3.1.:
9.27.13.3. Design and Installation (1) The design of an exterior insulation finish system shall comply with CAN/ULC-S716.3, “Exterior Insulation and Finish Systems (EIFS) – Design Application”. (2) The installation of an exterior insulation finish system shall comply with CAN/ULC-S716.2, “Exterior Insulation and Finish Systems (EIFS) – Installation of EIFS Components and Water Resistive Barrier”. Section 9.28. Stucco 9.28.1. General
Notes to Table 9.26.3.1.:
9.28.1.1. Sheathing Beneath Stucco (1) Sheathing shall be provided beneath stucco applied over wood frame walls except as permitted in Article 9.28.4.2. (2) Where applied beneath stucco, sheathing shall conform to Subsection 9.23.16.
Notes to Table 9.26.3.1.:
9.28.1.2. Lath and Reinforcing (1) Stucco lath or reinforcing shall be used to attach stucco to any substrate other than masonry. (2) Stucco lath or reinforcing shall be used to attach stucco to masonry where, (a) the masonry is soft-burned tile or brick of less strength than the stucco, or (b) the masonry surface is not sound, clean and sufficiently rough to provide a good key. (3) Stucco applied over masonry chimneys shall be reinforced.
Notes to Table 9.26.3.1.:
9.28.1.3. Concrete Masonry Units (1) Stucco finish shall not be applied over concrete masonry units less than one month old unless the units have been cured by the autoclave process.
Notes to Table 9.26.3.1.:
9.28.1.4. Clearance over Ground Level (1) Stucco shall be not less than 200 mm above finished ground level except when it is applied over concrete or masonry.
Notes to Table 9.26.3.1.:
9.28.1.5. Flashing and Sealants (1) Flashing and sealants used with stucco shall conform to Subsections 9.27.3. and 9.27.4., except that if aluminum flashing is used, it shall be separated from the stucco by an impervious membrane or coating. 9.28.2. Stucco Materials
Notes to Table 9.26.3.1.:
9.28.2.1. Portland Cement (1) Portland cement shall conform to CSA A3001, “Cementitious Materials for Use in Concrete”.
Notes to Table 9.26.3.1.:
9.28.2.2. Aggregate (1) Aggregate shall be clean, well-graded natural sand or sand manufactured from crushed stone, gravel or air-cooled blast furnace slag and shall contain no significant amounts of deleterious material. (2) Aggregate grading shall conform to Table 9.28.2.2. Table 9.28.2.2.   Aggregate Grading for Stucco Forming Part of Sentence 9.28.2.2.(2) Item   Column 1   Column 2   Column 3 

      Sieve Sizes, mm   % Aggregate Passing Sieve     

          Maximum   Minimum 

  1.   4   —   100 

  2.   2   —   90 

  3.   1   90   60 

  4.   0.5   60   45 

  5.   0.25   30   10 

  6.   0.125   5   —
Notes to Table 9.26.3.1.:
9.28.2.3. Water (1) Water shall be clean and free of significant amounts of deleterious material. 9.28.3. Fasteners
Notes to Table 9.26.3.1.:
9.28.3.1. Materials (1) Fasteners for stucco lath or reinforcing shall be corrosion-resistant and of a material other than aluminum.
Notes to Table 9.26.3.1.:
9.28.3.2. Nails and Staples (1) Nails for stucco lath or reinforcing shall be not less than 3.2 mm diam with a head diameter of not less than 11.1 mm. (2) Staples for stucco lath reinforcing shall be not less than 1.98 mm diam or thickness. (3) Staples and nails for attaching stucco lath or reinforcing to vertical surfaces shall be of sufficient length to penetrate 25 mm into framing members or to the full depth of the sheathing where the sheathing is used for attachment. (4) On horizontal surfaces nails for stucco lath or reinforcing shall be not less than 38 mm long. 9.28.4. Stucco Lath
Notes to Table 9.26.3.1.:
9.28.4.1. Materials (1) Rib lath or expanded metal stucco mesh shall be, (a) copper-alloy steel coated with rust-inhibitive paint after fabrication, or (b) galvanized. (2) Woven or welded wire mesh shall be galvanized.
Notes to Table 9.26.3.1.:
9.28.4.2. No Sheathing Required (1) Sheathing need not be provided beneath stucco where not less than 1.19 mm diam galvanized wire is applied horizontally to the framing at vertical intervals not exceeding 150 mm, or where paper-backed welded wire metal lath is used.
Notes to Table 9.26.3.1.:
9.28.4.3. Stucco Lath Specifications (1) Stucco lath shall conform to Table 9.28.4.3. Table 9.28.4.3.   Stucco Lath Forming Part of Sentence 9.28.4.3.(1) Item   Column 1 Location   Column 2 Type of Lath   Column 3 Minimum Diam of Wire, mm   Column 4 Maximum Mesh Opening   Column 5 Minimum Mass, kg/m2 

  1.   Vertical surfaces   Welded or woven wire   1.15   25 mm   — 

          1.30   38 mm   — 

              1.50   51 mm   — 

          Stucco mesh reinforcing (expanded metal)   —   25.8 cm2   0.98 

  2.   Horizontal surfaces   9.5 mm rib lath   —   —   1.84 

      Cedar lath   —   —   —
Notes to Table 9.26.3.1.:
9.28.4.4. Self-Furring Devices (1) Stucco lath shall be held not less than 6 mm away from the backing by means of suitable self-furring devices.
Notes to Table 9.26.3.1.:
9.28.4.5. Application of Stucco Lath (1) Stucco lath shall be applied with the long dimension horizontal. (2) Horizontal and vertical joints in stucco lath shall be lapped not less than 50 mm. (3) End joints of stucco lath shall be staggered and shall occur over framing members. (4) External corners of stucco lath shall be reinforced with a vertical strip of lath or reinforcing extending not less than 150 mm on both sides of the corner, or the lath or reinforcing shall extend around corners not less than 150 mm.