With many vapor barriers used for interior building construction, there will still be some moisture vapor that enters the wall cavity, whether it's through a seam or a wall penetration. Even a small amount of moisture can cause mold growth, moisture damage and poor insulation performance. What's required is a barrier that completely prevents all moisture from getting in. You'll find such products here at Spycor Building Products. For example, Dörken DELTA®-REFLEX vapor barriers are high performance barriers are designed to be 100 percent impermeable to water vapor, keeping thermal insulation free from wetting and damage. An effective vapor barrier is a vital part of any basement waterproofing solution.