A 4 x four-in. area every single 6 ft. is enough to help the wall. If there are hurdles alongside the wall (like a furnace), plan to tunnel less than them. You’ll discover almost all of the materials you’ll need to have at a home center. Purchase the rock from https://basement-waterproofing00875.boyblogguide.com/34423502/considerations-to-know-about-basement-waterproofing