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Putting OSB* down in crawl space
Posted on 7/24/24 at 8:22 pm
Posted on 7/24/24 at 8:22 pm
Looking at some winter projects and we really don't utilize our attic effectively. We've got some OSB sheets just around the entrance to the crawl space but the rest of it is just insulation and joists.
I know a few spots that need some added insulation before I move forward, but I'm guessing getting cheap home depot OSB would be acceptable to throw down over most of the attic? Again this is mainly for storage purposes.
I know a few spots that need some added insulation before I move forward, but I'm guessing getting cheap home depot OSB would be acceptable to throw down over most of the attic? Again this is mainly for storage purposes.
This post was edited on 7/25/24 at 8:42 am
7
Posted on 7/24/24 at 10:16 pm to BilbeauTBaggins
I used leftover plywood from my house building in places in my attic and then covered the rest with 7/16” osb. Figured nothing heavy I put up would be skinnier than 16” so it should hold up. Haven’t had a problem yet.
I also ripped all sheets to be 2’ x 8’ to make it easier to get into the attic. Then screwed in or nailed into place.
I also ripped all sheets to be 2’ x 8’ to make it easier to get into the attic. Then screwed in or nailed into place.
Posted on 7/24/24 at 10:55 pm to BilbeauTBaggins
quote:
cheap home depot plywood
Have you seen what HD charges for plywood lately? But yea, 3/4 OSB is the cheapest and good for decking. You could probably get away with. 7/16 OSB.
This post was edited on 7/24/24 at 10:59 pm
Posted on 7/24/24 at 11:25 pm to akimoto
Yeah I should've mentioned I just want some type of wood material that's cheap and effective enough, not specifically plywood
Posted on 7/25/24 at 5:22 am to BilbeauTBaggins
Go the cheapest route, but don't go too thin as you would hate to fall through an attic. 
Posted on 7/25/24 at 9:59 am to BilbeauTBaggins
minimum 5/8 (or 19/32) whatever you do. I've done less because it's what i had and its too flimsy for my liking. 5/8 osb subfloor is $20.90, 5/8 plywood is $24.40. Between those two, i would go with the plywood but can't give you a scientific reason why.
Posted on 7/25/24 at 10:09 am to BilbeauTBaggins
I'm going to finish put my wood shop with 7/16 osb. I wouldn't use that foe your article as it's not much support, just for sheathing. I'd go with a thicker 5/8 minimum if you're going to be walking on it.
I'm doing osb in my dedicated woodworking shop because I want to be able to easily remove sheets if I want to add wiring or redo something at a later date.
ETA--I'm also a touch confused because I've only ever heard of the crawl space being referred to as the area underneath the floor joists on a conventional concrete foundation.
I'm doing osb in my dedicated woodworking shop because I want to be able to easily remove sheets if I want to add wiring or redo something at a later date.
ETA--I'm also a touch confused because I've only ever heard of the crawl space being referred to as the area underneath the floor joists on a conventional concrete foundation.
This post was edited on 7/25/24 at 10:19 am
Posted on 7/25/24 at 11:10 am to BilbeauTBaggins
Can OSB get splintery? ( if that's a word)
I'd hate to go up to my attic to retrieve the Christmas garland and get a splinter in my foot
I'd hate to go up to my attic to retrieve the Christmas garland and get a splinter in my foot
Posted on 7/25/24 at 11:33 am to East Coast Band
You go barefoot into your attic, baw?
Posted on 7/25/24 at 12:46 pm to El Segundo Guy
quote:
You go barefoot into your attic, baw?
I often do not wear shoes in the house, so to answer your question is"yes".
Posted on 7/25/24 at 1:09 pm to El Segundo Guy
quote:
ETA--I'm also a touch confused because I've only ever heard of the crawl space being referred to as the area underneath the floor joists on a conventional concrete foundation.
Same here. Since he's talking about decking an attic space and not a crawl space.
OSB would work fine, especially if the joists are on 16 inch centers. Minimize the amount of screws used to hold it in place just in case it needs to come up later for repair work like additional wiring and such.
Posted on 7/25/24 at 2:28 pm to BilbeauTBaggins
I have 7/16 in my attic, and it's too thin.
Posted on 7/25/24 at 2:51 pm to GrizzlyAlloy
I think my builder used 3/4" PWD in the attic area that gets the most storage. I went back and put some leftover 5/8" in areas that weren't covered plus 2' wide walkways in the upper attic. Lower attic is 2X12 ceiling joists so that's the bulk of our stuff. Upper is 2"X8's. Im hesitant to but to much up there.
Posted on 7/25/24 at 3:14 pm to gumbo2176
quote:this
Minimize the amount of screws used to hold it in place just in case it needs to come up later
I removed 400SF of attic platform over my garage this spring, it had been fastened down with 3” ring shank nails every two inches all around each 4x8 sheet. Damn near killed myself
Posted on 7/25/24 at 3:27 pm to Zappas Stache
quote:
You could probably get away with. 7/16 OSB.
Ouch.
5/8 plywood sheathing or 3/4 OSB.
Plywood is a little stronger in between the joists if you plan on walking around on it.
If just a space to store Christmas decorations then anything will do.
Posted on 7/25/24 at 4:13 pm to 9rocket
Yeah, it's a "crawl space" in the sense that my attic is not tall enough for me to walk under.
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