Monday, August 5, 2013
5. Exterior And Interior Drainage Systems
There are two types of drainage systems when it comes to basement waterproofing. Interior and exterior. Both do basically the same thing. Drain water from alongside the wall into the weeping tile system and away from the house. Both cost a pretty penny too with exterior basement waterproofing costing the most of the two.
Exterior basement waterproofing involves excavation of the ground alongside the foundation wall. The ground is dug up and piled beside the hole. The hole is usually dug 6 feet deep however some have been dug 9 feet deep. We have to dig down to the footing and alongside it because that's where the weeping tile is placed, alongside the footing. A wall treatment and barrier is installed on the foundation wall and weeping tile is placed alongside the footing with a few inches of gravel. Then the hole is back filled.
Interior drainage systems are the less expensive basement waterproofing solution used by some home owners. It involves breaking up the concrete floor about 6 inches away from the wall in a path alongside the foundation wall to the sump pump or floor drain. A trench is dug out about 6 inches deep to where the footing is and dug out right beside the footing. Weeping tile is placed in this trench alongside the footing all the way to the sump pump or floor drain. Black dimple board is nailed to the wall and ran into the trench beside the weeping tile as to create a barrier that drains water into the weeping tile. The weeping tile is covered with gravel and concrete is poured on top covering up the gravel and weeping tile about 1-2 inches thick. This system drains water that penetrates the foundation wall into the weeping tile and into a floor drain or sump pump which shoots the water away form the house.
Both methods of basement waterproofing are solid solutions to basement leaks and both a solid preventative measure. Interior drains cost less however they cant exactly be done in homes that have finished basements and exterior basement waterproofing sometimes isn't feasible if there are issues such as a large deck in the way or air conditioner.
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Keywords: basement waterproofing