River wash gravel is placed in the drain line trench to aide in water stream. We then put in Polydrain, an air-gap technology drainage board at the cove area in which the foundation wall meets the basement floor. This heavy duty built drainage matting is bent and placed the wall up and above the trench. It increases water and directs intruding water because of hydrostatic pressure into the subgrade tile program. After the installation of this Polydrain the trench is sealed with industrial grade concrete.
Fairfax County Interior Basement Waterproofing solutions may also include things like wall systems. Alternatives are a 6 mil polyethylene vapor barrier which is tucked in the Polydrain and installed normally from floor to ceiling. To get a cleaner look and for walls with a high moisture content Polywall, an extruded resin sheet could be installed. It’s not difficult to wash, 100% waterproof and does not support mold, mildew or bacteria growth. For wall regions with high water content, like corners, problem areas or older construction, Polydrain may be installed complete wall or chest elevated.