Water is one of the greatest enemies of the basement walls. Even with the presence of sealants, over time the pressure of groundwater can cause damp spots or leaks in the area. Durable drainage boards are an efficient solution, and will direct water away from the foundation, keeping the walls dry.
Drainage boards are typically constructed with high density plastic or polymer sheets that have a textured surface. This design provides a space between the wall and the surrounding soil, so that water can drain downwards to a drainage system rather than applying pressure directly to the wall. Some boards also have channels or dimples to allow better water flow and decrease hydrostatic pressure.
Installation of drainage boards is easy if done in conjunction with exterior waterproofing. They help to protect the foundation and complement sealants or membranes so there are several layers of defence. By channeling the water safely to French drains, gravel beds or sump pumps they minimize the moisture infiltration and long-term structure problems.
Durable drainage boards also improve the insulation performance. Since walls remain drier, whatever insulating material you use will retain its effectiveness by keeping the basement warmer and energy-efficient. This two-fold feature of managing water and waterproofing makes them a clever investment on the life of the basements.
Conclusion
Durable drainage boards are an important part of exterior protection of the basement. By diverting water away and removing any pressure built on walls, they prevent them from leaking, doing damage and prolong the life of your renovation. Combining drainage boards, sealants and proper insulation makes for a truly resilient basement.