Project Number: AW-2271

Contract Number: TW-0663

November 4, 1994

SPECIAL SPECIFICATION

SECTION 09200

[STUCCO SYSTEM]{.underline}

Page

[PART 1 - GENERAL]{.underline}

1.01 Description Of Work 2

1.02 Quality Assurance 2

1.03 Submittals 2

1.04 Delivery, Storage And Handling 3

1.05 Job Conditions 3

PART 2 - PRODUCTS

2.01 Materials 4

2.02 Metal Accessories 5

PART 3 - EXECUTION

3.01 Inspection 6

3.02 Mixing 7

3.03 Application 7

3.04 Scaffolding 9

3.05 Cutting And Patching 10

3.06 Cleaning And Protection 10

SPECIAL SPECIFICATION

SECTION 09200

[STUCCO SYSTEM]{.underline}

# PART 1 - GENERAL

## 1.01 [DESCRIPTION OF WORK]{.underline}

The location and extent of stucco system on exterior wall surfaces is
indicated on drawings.

A. [Work includes]{.underline} pre-mixed, fiber-reinforced portland
cement plaster basecoat concentrate for job site mixing with sand to
provide scratch and brown coats to receive exterior wall finish coat
system.

B. [Pre-mixed, pre-sanded, colored acrylic polymer]{.underline} based
finish coat system.

## 1.02 [QUALITY ASSURANCE]{.underline}

A. [Single Resource Responsibility]{.underline}: Obtain all lath and
cement plaster finish coat system and all other materials for the stucco
system from a single manufacturer.

B. [Requirements of Regulatory Agencies]{.underline}: Install stucco
basecoat system to comply with all applicable codes and standards and
with requirements of local agencies having jurisdiction.

C. [Applicator Qualifications]{.underline}: Application of similar
stucco system for at least five years of experience and projects equal
in scope to this work.

D. [Allowable Tolerances]{.underline}: Maximum deviation from true plane
1/8\" in 10 ft. as measured by straight edge placed at any location on
surface.

E. [All materials used]{.underline} shall not contain asbestos fibers.

## 1.03 [SUBMITTALS]{.underline}

A. [Product Data]{.underline}: Submit manufacturer\'s product data for
cementitious materials, colors, lath, metal support components, and
accessories.

B. [Material Certificates]{.underline}: Submit producer\'s certificate
for each kind of plaster aggregate indicated evidencing that materials
comply with requirements.

C. [Samples]{.underline}: Two 2\'-0\" X 2\'-0\" minimum panels at job
site, showing application workmanship, texture, techniques and colors.
Sample panel to be approved by the Sandia Designated Representative
(SDR) and noted as to color and texture ranges.

D. [Do not proceed with work until]{.underline} sample stucco finish is
reviewed and approved by SDR. Maintain sample panel on project site for
duration of project for comparison purposes. Remove sample upon project
completion or when directed by the SDR.

## 1.04 [DELIVERY, STORAGE AND HANDLING]{.underline}

A. [Deliver materials]{.underline} in original unopened packages,
containers or bundles bearing brand name and identification of
manufacturer.

B. [Store materials]{.underline} inside, under cover and in manner to
keep them dry, protected from weather, direct sunlight, surface
contamination, aging, corrosion, and damage from construction traffic
and other causes.

C. [Environmental Requirements, General]{.underline}: Comply with
requirements of referenced stucco application standards and
recommendations of stucco manufacturer for environmental conditions
before, during, and after application of stucco.

D. [Remove]{.underline} wet or deteriorated materials from site.

## 1.05 [JOB CONDITIONS]{.underline}

A. [Environmental requirements]{.underline}:

1\. [Cold Weather Requirements]{.underline}:

a\. Do not use frozen materials in cement plaster mixes.

b\. Do not apply cement plaster to frozen surfaces or surfaces
containing frost.

c\. Do not apply cement plaster when ambient temperature is less than 44
degrees F (4.4 degrees C) or expected to drop below 44 degrees F for 24
hours.

2\. [Hot Weather Requirements]{.underline}:

a\. Protect cement plaster from uneven and excessive evaporation during
hot, dry weather. Wet cure basecoat a minimum twice daily for a minimum
of 48 hours.

b\. Do not apply cement plaster when ambient temperature is above 100
deg. F.

B. [Protection]{.underline}:

1\. Protect finished surfaces installed prior to plastering.

2\. Maintain protection in place until completion of work.

# PART 2 - PRODUCTS

## 2.01 [MATERIALS]{.underline}

A. [Fiber-Reinforced Portland Cement Plaster Basecoat
Concentrate]{.underline}:

Manufacturer\'s standard pre-mixed stucco basecoat consisting of
portland cement and alkali resistant glass and acrylic fibers.

Product/Manufacturer: FIBER-47 Concentrate as manufactured by El Rey
Stucco Company, Inc., or approved equal.

B. [Exterior Wall Finish Coat System]{.underline}:

1\. Manufacturer\'s standard premixed exterior wall finish consisting of
acrylic polymers, properly graded aggregates and colorant.

a\. [Color]{.underline}: As selected at time of submittals.

b\. [Finish Texture]{.underline}: Medium Brocade.

c\. [Product/Manufacturer]{.underline}: PERMA-FLEX as manufactured by El
Rey Stucco Co., Inc., or approved equal.

C. [Sand]{.underline}:

1\. Comply with all requirements of ASTM C 897.

2\. [Gradation]{.underline}:

[US Standard Sieve]{.underline} [Weight Retained]{.underline}

No. 4 0%

No. 8 0-10%

No. 16 10-40%

No. 30 30-65%

No. 50 70-90%

No. 100 95-100%

D. [Water]{.underline}: Potable

E. [Bonding Agent]{.underline}:

1\. Acrylic bonding agent as manufactured and as recommended by stucco
basecoat system manufacturer.

2\. Product/Manufacturer: PERMA-FLEX 400 as manufactured by El Rey
Stucco Company, Inc., or approved equal.

F. [Metal Lath]{.underline}: (ASTM C1063-86)

1\. [Diamond Mesh]{.underline}: Shall be US Gypsum Co.\'s self-furring
Diamond Mesh metal lath, weighing 3.4 lbs. per square yard , to be used
on horizontal surfaces and as reinforcing around doors and windows.

2\. [Stucco Lath]{.underline}: Shall be Davis Walker 17 ga. self-furring
stucco netting, or approved equal. To be used on framing at 16\" o.c. or
less.

a\. Screw attach with minimum 1/2\" penetration into steel stud attached
every 6\" at every stud.

b\. Masonry screw attach for application into CMU.

G. [Plywood Sheathing]{.underline}: Waferboard, sheathing grade,
Louisiana Pacific \"Inner-Seal\" or equal, by general contractor - see
drawings for different requirements in rated and non-rated areas. Gap
all wood sheathing at least 1/8\".

H. [Gypsum Sheathing]{.underline}: Exterior grade, by general
contractor - see drawings for different requirements in rated and
non-rated areas.

I. [Weather Resistive Barrier]{.underline}: Two layers of grade \"D\",
15 pound building paper over wood sheathing, one layer over gypsum
sheathing attached per industry standards and Code requirements.

J. [Install lath in accordance with]{.underline} ASTM C1063, wire-tying
control joints to mesh. Do not attach to framing.

## 2.02 [METAL ACCESSORIES]{.underline}

A. [General]{.underline}: Utilize manufacturer\'s suggested construction
details, and as shown on the drawings.

B. [Metal Accessories]{.underline}: Manufacturer\'s suggested steel
products unless otherwise indicated as Zinc Alloy. Do not fill with
plaster or cement.

1\. [Exterior Components]{.underline}: Hot dip galvanized finish, ASTM
A525, G90 for 18 gauge and lighter, ASTM A123 for galvanized after
fabrication for 16 gauge and heavier products.

2\. [Corner Beads]{.underline}: J-Metal or plaster stop, general purpose
type with expanded or perforated flanges. (Exterior Corners)

3\. [Cornerite]{.underline}: Manufacturer\'s standard preformed interior
corner reinforcement made from 2.5 lbs./sq. yd. of diamond mesh lath.
(Interior Corners)

4\. [Square-Edged Casing Beads]{.underline}: Expanded or flanged to suit
application. (For Square Corners)

5\. [No. 10x Bull Nose Corner Bead]{.underline}: For rounded corner
reinforcement. (Rounded Corners)

6\. [Control Joints]{.underline}: No. XJ15-3 control joint with 1/4\"
slot, and 1\" grounds, or equal. Control joints must be wire tied to the
lath and not nailed or screwed to substrate.

7\. [Expansion Joints]{.underline}: No. 40 adjustable expansion joint,
free floating with adjustments from 1/4\" to 5/8\".

8\. [Weep Screeds]{.underline}: No. 7 Foundation Sill Screed, with holes
for drainage.

9\. [Fasteners]{.underline}: (CMU Applications) Galvanized steel of
furring type and length suitable for at least 1/2\" penetration of the
brick or block substrate.

10\. [Fasteners]{.underline}: (Steel Stud Applications) Furring nails
and or screws, galvanized steel of type and length suitable for at least
a 2/3\" penetration of the steel stud system.

11\. [Stucco which abuts]{.underline} windows, doors, or other
terminations must be terminated with casing bead by El Rey Stucco
Company, or approved equal.

C. [Apply plaster screeds]{.underline} at a maximum of 12\'-0\" o.c. to
allow for rodding.

# PART 3 - EXECUTION

## 3.01 [INSPECTION]{.underline}

A. [Inspection for Base Coats]{.underline}:

1\. Verify that surfaces to be plastered are free of dust, loose
particles, oil and other deleterious materials which would affect bond
or proper hydration of cement plaster.

2\. Verify that lath is tight, properly secured and overlapped, and that
all accessories are properly set and secured.

3\. Examine substrates, grounds and accessories to ensure that finished
plaster work will be true to line, plane, level and plumb.

4\. Verify that masonry and concrete surfaces to receive direct bond
applications of plaster base coats are rough or otherwise properly
prepared to provide adequate bond. All masonry surfaces are to be metal
lathed with one layer of grade \"D\" building paper to provide adequate
bond.

5\. Installer shall notify General Contractor and SDR in writing of any
conditions detrimental to proper and successful installation of stucco
base coats. Do not proceed with installation until unsatisfactory
conditions are corrected to satisfaction of SDR and Installer.

B. [Inspection for Finish Coat]{.underline}:

1\. Verify that surfaces to receive exterior wall finish coat are free
of dust, loose particles, oil and other deleterious materials which
would adversely affect bond of exterior wall finish.

2\. Examine base coats, grounds and accessories to ensure that finished
work will be true to line, plane, level and plumb.

## 3.02 [MIXING]{.underline}

A. [General]{.underline}:

1\. Accurately proportion materials for each plaster batch with
measuring devices of known volume.

2\. Size batches for complete use within maximum of one hour after
mixing.

3\. Retemper plaster stiffened from evaporation, but do not use or
retemper partially hydrated cement plaster.

4\. Do not use frozen, caked or lumpy materials, and remove such
materials from job site immediately.

5\. Mix factory prepared cement plaster in accordance with
manufacturer\'s written instructions and recommendations.

6\. Use moist, loose sand in proportions recommended by basecoat
concentrate manufacturer.

7\. Withhold 10% of mixing water until mixing is nearly complete, then
add as needed to produce desired working consistency.

B. [Polymer Based Tinted Wall Finish]{.underline}:

1\. Add very small amounts of water as needed at job site to adjust
consistency of finish coat material for application method required.

2\. Mix finish in accordance with manufacturer\'s written instructions
and recommendations.

C. [Mechanical Mixing]{.underline}:

1\. Mix materials with machine driven paddle.

2\. Clean mixer of set or hardened materials before loading new batch.

3\. Maintain mixer in continuous operation while adding materials.

4\. Conform to mixing sequence, cycle of operations, and time
recommended by the manufacturer of the basecoat mix materials.

D. [Hand Mixing]{.underline}:

1\. Do not hand mix stucco basecoat system materials unless authorized
by SDR.

2\. Use waterproof mixing boxes and water barrels when mixing within
building.

## 3.03 [APPLICATION]{.underline}

A. [General]{.underline}:

1\. Apply cement plaster by hand and in accordance with manufacturer\'s
instructions and recommendations, and in compliance with requirements of
applicable codes, regulations and agencies having jurisdiction.

2\. Interrupt cement plaster only at junctions of plaster planes, at
openings, or at control joints.

3\. Tool through second and finish coats to produce \"V\" joint at
intersection of frames or other items of metal or wood which act as
plaster grounds.

4\. Apply second coat to first coat, bringing out to grounds, flat to
true surface, and free of imperfections which would reflect in finish
coat.

5\. Reconsolidate and even plane of second coat. Trowel to smooth and
uniform surface to receive acrylic polymer based finish.

6\. Nominal plaster thicknesses = 1\":

a\. First coat: 3/8\"+ (10 mm)

b\. Second coat: 3/8\"+ (10 mm)

c\. Third coat: 1/8\" (3 mm)

B. [Base Coats]{.underline}:

1\. [Over Metal Lath Base]{.underline}:

a\. Apply with sufficient material to form keys through metal lath.

b\. Embed and fill all spaces of lath and scratch vertical surfaces
horizontally.

c\. Scratch horizontal surfaces in one direction only, prior to initial
set, using sufficient trowel pressure to key plaster into lath or to
create bond to substrate as applicable.

2\. [Over Solid Bases]{.underline}:

a\. Apply first coat with sufficient pressure to insure tight contact
with complete coverage of solid bases, immediately scratching to provide
mechanical key for second coat.

3\. [Second Coat]{.underline}:

a\. Apply second coat with sufficient pressure to insure tight contact
with first coat.

b\. Bring surface to true and even plane.

c\. Float to uniformly rough surface to provide bond for acrylic polymer
finish coat.

d\. Tool brown coat to provide a v-joint at intersection of plaster with
frames or other item of wood, or metal.

C. [Primer]{.underline}: Apply primer with brush, roller or spray for
complete coverage of area to receive polymer based finish.

D. [Finish Coats]{.underline}:

1\. Apply plaster in number of coats and consistency to achieve required
texture, to minimal thickness specified, using sufficient trowel
pressure to bond finish coat to basecoat.

2\. Texture finish coat to match acceptable samples.

E. [Workmanship shall be neat and in accordance with]{.underline} the
best standards of workmanship. Entire coated surfaces must appear to be
evenly applied, without excess lumping or surface irregularities. Cut,
patch, and repair stucco system as necessary to accommodate other work
and to restore dents and imperfections. Repair or replace work to
eliminate blisters, buckles, similar defects, and where bond to the
substrate has failed. No patch work shall be evident.

F. [Curing]{.underline}:

[COAT FIRST SECOND THIRD]{.underline}

Minimum Period

Moist Curing 48 Hours 72 Hours 48 Hours

Minimum Protect from

Interval dust and water

Between Coats 48 Hours 7 Days for a minimum of

12 hrs. following application

1\. Maintain moist conditions by fogging mist. [Do not
saturate]{.underline}.

2\. Moist cure each coat of stucco base coat system sufficiently
frequently to maintain uniform moisture continuously for a minimum of 48
hours after application.

3\. Moist cure brown coat continuously for a minimum of 72 hours.

4\. Air cure polymer based finish cot. [Do not]{.underline} wet coat.

5\. In freezing weather, do not apply stucco unless special precautions
are taken to keep materials above 50o F. during mixing and 48 hours
thereafter.

## 3.04 [SCAFFOLDING]{.underline}

[The stucco contractor shall provide]{.underline} all necessary planks
and scaffolding required for his work.

## 3.05 [CUTTING AND PATCHING]{.underline}

[Cut, patch, point-up and repair stucco as necessary]{.underline} to
accommodate other work and to repair cracks, dents and imperfections.
Repair or replace work to eliminate blisters, buckles, excessive crazing
and check cracking, dry-outs, efflorescence, sweat-outs and similar
defects, and where bond to the substrate has failed. Point-up plaster
around trim and other locations where plaster meets dissimilar material.
Cut out and patch stained or discolored finished plaster not scheduled
to be painted. Match patch of defective or damaged plaster to existing
work in form, texture and color.

## 3.06 [CLEANING AND PROTECTION]{.underline}

[Remove temporary protection and enclosure of other work]{.underline}.
Promptly remove stucco from door frames, windows, and other surfaces
which are not to be stuccoed. Repair floors, walls and other surfaces
which have been stained, marred or otherwise damaged during the
stuccoing work. When stucco work is completed, remove unused materials,
containers and equipment and clean grounds of stucco debris.

END OF SECTION