With what type of coating shall the foundation walls be damp-proofed?

Damp-proofing foundation walls is an essential practice in construction to protect against moisture intrusion. The use of bituminous coatings is standard because these coatings are specifically designed to provide a barrier against moisture and water. Bituminous materials are derived from asphalt and provide strong, flexible, and adhesive properties that allow them to effectively seal and protect against water permeation.

This type of coating is also advantageous because it can be applied in varying weather conditions and can adhere well to various surfaces found in foundation walls. Bituminous coatings create a waterproof membrane that prevents ground moisture from penetrating into the concrete foundation, ultimately protecting the structural integrity of a building.

Other materials such as vinyl, polyethylene, and concrete sealants do not typically possess the same waterproofing properties or durability required for effective damp-proofing of foundation walls. For instance, while polyethylene is used in vapor barriers, it does not provide the waterproof qualities necessary for damp-proofing. Concrete sealants may help resist water but are not as effective as bituminous coatings for the specific application of damp-proofing. Thus, bituminous coatings are the preferred choice for this function in residential construction.