Green Power
Veteran Member
- Joined
- Dec 1, 2013
- Messages
- 1,077
- Location
- Nebraska
- Tractor
- LS R4047H, Kubota L33400 JD: 5075E 6150M 9230 and 8520
Nice work on the pony wall!
My engineer said he wanted 5/8 gypsum board under the insulation above my crawl space. Why? I don't know. <snip>
Can't say I've ever heard of that. It is usually used as a fire stop or slowing barrier, such as in attached garages. In that use, the exposed lower edge of the TJI's would not pass inspection here. Is is not going to rain before you get the roof on it? Seems like rain would be the end of exposed gypsum with or without the OSB subfloor.

It's a gamble. We could go until August without rain, or it might rain next week. I'll cost the OSB with water sealer and then cover the whole floor with. 6 mil plastic. Then pray for the best.
View attachment 370091
Bo, just wondering but will you put down plastic over top the dirt in the crawl space? Why I ask in Maryland (very humid) I had a 4 foot tall crawl space with a dirt floor. It got so humid in there, even though I had screened vents in the block wall that the insulation overhead was dripping water. I did not have any sheets of drywall though. When I covered the dirt with two layers of heavy plastic it stopped all moisture. I also installed a humidistat controlled fan in the screened vent to remove any humid air in the crawl space. Of course you being in Arizona have a completely different climate but plastic is cheap and it might also keep small insects/critters from coming up in the dirt. Just curious what you are going to do. Love your project and thanks for keeping us posted. Stanley