Less than 1% of builders using TUFF-N-DRI® Basement Waterproofing System have reported callbacks for basement leaks. 85% reported callbacks while using dampproofing.
When it comes to comparing waterproofing and dampproofing, there really is no comparison. The composition and performance of dampproofing products simply don't stack up to the composition and performance of waterproofing products.
Fact: Dampproofing material wasn't created to protect basements – or even repel water, for that matter. It's actually a type of unmodified asphalt originally created to prepare road surfaces for other materials.
In typical installations, dampproofing is applied in a layer that's at most 10 mils thick when cured. The material degrades quickly underground, becomes brittle and shatters at low temperatures.
Dampproofing won't span foundation settling cracks. As the foundation develops new cracks over time, dampproofing cracks right along with it. These cracks can serve as water channels rather than providing a shield against water. And, unlike waterproofing, dampproofing won't stop water under hydrostatic pressure, which occurs naturally underground.
TUFF-N-DRI® Basement Waterproofing System and WATCHDOG WATERPROOFING® products feature a polymer-enhanced asphalt membrane. This flexible membrane is spray-applied to provide a minimum 40 mils of protection when cured. (Which is at least four times thicker than typical dampproofing.)
Because of its spray application and elasticity, the waterproofing membrane seamlessly spans foundation settling cracks – now, and in the years ahead. The membrane also remains elastic at low temperatures for reliable performance, season after season. No wonder our waterproofing products seal out water penetration, even from water under hydrostatic pressure. That's why we offer such strong transferable performance warranties that dampproofing simply can't provide.
With its quality foundation board, TUFF-N-DRI adds further advantages that dampproofing can't match. The foundation board protects the waterproofing membrane, assists drainage, insulates basement walls against energy loss and reduces interior condensation.