What is the recommended thickness of a vapor barrier under a 18″ raised house in southern Miss.?
myragold
| Posted in General Questions on
What is the reccomended thickness of a vapor barrier under a 18 inch raised house in southern Mississipi?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Search and download construction details
Replies
You mean the floor joists raised 18" off the ground? On a concrete perimeter foundation? On piers? Is there framing or skirting around the base?
Margaret,
Assuming that you want to cover dirt under a house on piers, you should use polyethylene that is at least 6 mils thick. A thicker ground cover will be more durable than a thinner one.
Hold the polyethylene in place with bricks, stones, or a layer of sand. Be sure to install skirting to keep out cats and raccoons.