moldman05
Well-Known Member
- Joined
- Jan 27, 2006
- Location
- Rocky Mount NC
Nc code requires insulation in the crawl space. If its a vented crawl space it must be installed in the floor. If its a closed crawl space it can be under the floor or on the foundation walls. A conditioned crawl space requires insulation on the foundation walls. After working on crawl spaces for 18 years and studying the results of about every possible combination of thousands of crawl spaces there is no data to support the need for insulation. I would probably limit this to average height of 3 feet or less. So on a new house I would go the cheapest route. If the walls were tall say 8 feet I would look at some type of closed cell on the walls. On existing homes I don't recommend adding it or replacing it if it needs to be removed.