My house is 16 years old with a block foundation and the exterior grading is good; 6" in 10'-0 drop. During particularly hard rains water enters my basement through some hairline cracks in the slab (the builder never installed expansion joints). There a few places along the wall/floor joint where this happens too. I suspect that there are no french drains or that they are clogged. As I cannot find where they discharge I suspect the former.
As we are planning some major landscaping anyway, I have reconciled myself to excavating and installing drains. I can't seem to find any recommendations for the amount of gravel backfill to install though. I was planning on using 1.5" (3b) gravel, but how far from the foundation wall and how high should it extend? I'm also wondering if landscape fabric is suitable as a filter around the pipe? If the entire trench can be filled, can I line the trench wall with it as well prior to backfilling? Thanks for any help you can provide.
Get Help from Bob Vila
- Give-Aways & Offers
- Monthly Must Do's
- DIY Project Ideas
- Step-by-Step Guides
- Inspirational Photo Galleries