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osb for ceiling
- Thread starter Ed Miller
- Start date
danski0224
Well-known member
If you use the 7/16 stuff and the framing is on 24" centers, it will sag unless you use the little clips.
OSB does not offer any fire protection at all compared to drywall.
OSB does not offer any fire protection at all compared to drywall.
Fuzzydog
Active member
I think that the drywall will boost your insulation factor as well.
1/2 osb is rated for 24" centers, it doesn't sag on the roof with a layer of shingles on it. 7/16" probably can't sag more than 1/4", barly noticable, with no load on it (you say the garage is already insulated). But I'd still recomend drywall, a dark ceiling makes a space feel small.
krooser
Well-known member
I have a combination of OSB and plywood on my ceiling and walls in my shop. I've never had a sagging problem in 10 years.
OSB takes paint pretty good so you can lighten up the shop with some whhite paint.
1/2" Plywood has an R-value of .63....1/2"drywall is .45.
See the enclosed chart for R-values for different materials.
http://coloradoenergy.org/procorner/stuff/r-values.htm
OSB takes paint pretty good so you can lighten up the shop with some whhite paint.
1/2" Plywood has an R-value of .63....1/2"drywall is .45.
See the enclosed chart for R-values for different materials.
http://coloradoenergy.org/procorner/stuff/r-values.htm
mdshore348
Well-known member
24" centers should use 5/8 sheetrock , i would never use osb. too much fire hazard, cant believe inspector would allow it, or even if insurance agent checked over your garage.
krooser
Well-known member
mdshore348 said:24" centers should use 5/8 sheetrock , i would never use osb. too much fire hazard, cant believe inspector would allow it, or even if insurance agent checked over your garage.
OSB is a common interior wall finish here in the midwest. I know of many shops, home and commercial, that use OSB for interior walls.
Here's some info from an OSB trade association that verifies that it meets fire rating standards.
http://www.osbguide.com/pdfs/TB100.pdf
danski0224
Well-known member
OSB does sag. Look at the roof of any cheap or expensive tract or semi custom home that uses 24" O.C. trusses and OSB for the roof. You can see every single seam and truss telegraph through the roof material when the sun is at the right angle. Some are so bad that you don't need lighting help. That is the reason behind the popularity of "architectural shingles" in tract homes- they charge you more to use cheaper materials.
You may not see the sag on your ceiling, and you will probably do a better job installing it than those cheap *** builders pushing their crews for maximum profit instead of quality.
You may not see the sag on your ceiling, and you will probably do a better job installing it than those cheap *** builders pushing their crews for maximum profit instead of quality.
carb454
Active member
mdshore348 said:24" centers should use 5/8 sheetrock , i would never use osb. too much fire hazard, cant believe inspector would allow it, or even if insurance agent checked over your garage.
Definately a NO-NO in Md.
I also would recommend sheetrock, harder to put up for sure , just make a T-post from a couple 2x's and they will take the weight while you screw gun it to the trusses.
just make a T-post from a couple 2x's
I rented one of those drywall lifts, I think it was $40 for the day, well worth it, especially with the 5/8"