6
votes
1answer
1k views

What is the best way to seal a French drain board due to high levels of radon?

The Radon level in my crawl space is above the threshold (~5.5) and the level in my basement is around 4. I'd like to install a radon mitigation fan that sucks air from the sump pump of a French ...
6
votes
7answers
27k views

How do I prevent water from collecting against side of house?

Our house has a concrete patio (I'd say about 12' x 10') in the back that is very slightly angled in so that rainfall can cause water to collect where the patio meets the back wall of the house. What ...