Dave Maxwell
Well-known member
Do I need the vapor barrier behind my vertical pieces of foam board or just under the foam for the floor
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vapor barrier
- Thread starter Dave Maxwell
- Start date
dcs Inc
Well-known member
If you have a possibility of water instrusion under the slab from this area then yes.
OP
Dave Maxwell
Well-known member
OK thanks. Got my trench dug and the foam board cut at 2 foot getting ready to install. Will hang a piece between it and the board and dirt.
dcs Inc
Well-known member
Tape your seams. If you are using a real vapor barrier they will have tape for it. If just 6 mil visqueen then get some good tape.
OP
Dave Maxwell
Well-known member
Got gorilla tape for foamboard. Ill use it here also. Plan is to staple it to splash board. The let it hang sown. Install my 2 inch foam board 2 foot down. Then fill dirt for floor. Lay the plastic on prepped ground and install foamboard. Do I need yo bring the plastic up and around the foamboard on the sides ot just on the outside. It will have a five inch floor. So 19 inches will be under floor on sides.
thanks
thanks
dcs Inc
Well-known member
Think of a swimming pool and install your vapor barrier to hold water in it. Vapor doesn't travel far horizontally. I tend to try to overdo it when it comes to this.... it's cheap insurance.
Check the moisture under rubber thread, I'm offering calcium chloride test kits for $12.00
Check the moisture under rubber thread, I'm offering calcium chloride test kits for $12.00