Trench drains are elongated drains, often installed at the bottom of doorways or stairways, from basements to the exterior, to catch water. They are often connected to interior drains and sump pumps, as they should be. They work very well to let water down, but they also have an unintended consequence- they let air up. Basements are naturally depressurized relative to outside- meaning they always suck air from the ground and outside- IN. This can be a problem for 2 reasons:
Wednesday, August 29th, 2012