page_title: Damp (structural)
section_title: Damp-proofing rods
hierarchical_section_title: Damp (structural) / Rising damp / Rising damp treatment / Damp-proofing rods
caption_attribution_description: Damp-proofing rods installed in wall to form a DPC
context_page_description: Structural dampness is the presence of unwanted moisture in the structure of a building, either the result of intrusion from outside or condensation from within the structure.
  A high proportion of damp problems in buildings are caused by ambient climate dependent factors of condensation and rain penetration. Capillary penetration of fluid from the ground up through concrete or masonry is known as Rising Damp and is governed by the shape and porosity of the construction materials through which this evaporation limited capillary penetration takes place. Structural damp, regardless of the mechanisms through which it takes place, is exacerbated by higher levels of humidity.
context_section_description: Damp-proofing rods use similar active ingredients to those found in liquid or cream-based rising damp treatments, but contained in a solid rod. They are generally considered to be easier to use than other types of rising damp treatment as the method of installation is simply to insert them into the correct sized holes drilled into a mortar bed. Damp-proofing rods are available with BBA approval.
  The rods are placed into holes drilled in the mortar course and the active ingredients diffuse along the mortar line before curing to form a damp-proof course.
  Damp-proofing rods are usually supplied in 180mm lengths suitable for inserting into a 9-inch thick wall. For treating half-brick thick (4.5 inch) walls, the rods are simply cut in half.
  A benefit of damp-proofing rods compared with damp-proofing creams and liquids is that it is possible to guarantee a consistent dose of active ingredient into each hole drilled in the mortar course – i.e. it is impossible to under-fill the holes.
caption: Damp-proofing rods installed along a mortar course to treat rising damp by forming a damp-proof course (DPC)
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