We are adding on to our house by extending out one area which is a 4' high crawlspace and another area which will be our garage.
I specified a 4" slab with wire mesh and vapor barrier in both areas but my concrete contractor is telling me all I need is a 2" rat slab in the crawlspace.
The slab will be poured mostly on ledge so I'm not too worried about it going anywhere but I'd like to hear opinions if I should get 4" instead of 2". In the end, it's only another few hundred dollars for material so I will probably just do it.
For what it is worth, the crawlspace is over ledge and although there is a 4' clearance, we will not be using it for any storage. Also, we have high radon levels so I'm curious as to whether the slab thickness plays a part assuming we put in a vapor barrier (2 layers of 6 mill plastic I think).
Any thoughts would be appreciated.
Get Help from Bob Vila
- Give-Aways & Offers
- Monthly Must Do's
- DIY Project Ideas
- Step-by-Step Guides
- Inspirational Photo Galleries