Dampproofing protects the foundation wall from the adverse effects of water, frost, soil gases, and pyritic soils.

"Dampproofing: The process of coating the exterior of a foundation wall with bituminous emulsions, plastic cements. The purpose of dampproofing is to restrict the movement of soil vapour through basement walls and floor slabs to the interior of the basement. "

- CHBA Manual, Appendix 5, pg. 390

The NBC lists dampproofing and waterproofing for below grade as having separate requirements. Waterproofing is used where hydrostatic pressure occurs.

If dampproofing is not present or fails, some of the repercussions may be:

• Concrete deterioration
• Water damage
• Mould and mildew
• Structural damage