tried to search this but for some reason it won't work. Getting ready to install the 716 OSB ceiling and have some questions. Screws or nails, I have access to a framing nail gun and 3 1/2" nails but wondering if screws would hold better. I will be using blown insulation, do I need a vapor barrier between the OSB and insulation?
OSB for ceiling
- Thread starter al704
- Start date
I used an air nailer to put mine up but I used some 8d nails.
fteufert
Well-known member
I used screws, just in case I want to ever take them down.
lakeroadster
Well-known member
Location?
Heating the garage, Cooling the garage, or Both?
Heating the garage, Cooling the garage, or Both?
ddawg16
Well-known member
Attached garage?
Firewall between garage and house?
Firewall between garage and house?
ddawg16
Well-known member
Personally, I'd use 5/8" drywall before I used OSB. If you have a fire, well, get out fast.
I wouldn't use a vapor barrier on the ceiling. All it will really do is trap the moisture in the wood. Most of your moisture will come from inside.
Screw or nail is fine. Nails are faster...but screws make it easier to remove
What is your joist spacing?
I wouldn't use a vapor barrier on the ceiling. All it will really do is trap the moisture in the wood. Most of your moisture will come from inside.
Screw or nail is fine. Nails are faster...but screws make it easier to remove
What is your joist spacing?
Slowgsr
Well-known member
You won't need 3 1/2" nails, way too long. If your not perfectly centre of the truss your going to start splitting them - not good.
Vapor barrier between osb and insulation - yes
I'd use some 2" - 2 1/2 coil nails, that's what I used when I did my 1x4 strapping prior to drywall on the ceiling since trusses were 24" and I'd rather have a wider screwing strip at 16 oc
I'd never cover the walls of my garage with anything that burns, not sure why people do? If your anti drywall for some strange reason (especially for a building with heat/air) then I'd go metal.
Vapor barrier between osb and insulation - yes
I'd use some 2" - 2 1/2 coil nails, that's what I used when I did my 1x4 strapping prior to drywall on the ceiling since trusses were 24" and I'd rather have a wider screwing strip at 16 oc
I'd never cover the walls of my garage with anything that burns, not sure why people do? If your anti drywall for some strange reason (especially for a building with heat/air) then I'd go metal.
tfinniii
Well-known member
2 1/2 to 2 3/4 "ring shank" nails.
JCQuick
Well-known member
I like that logic as I considered OSB over drywall for my build
Kevin54
MEMBER EMERITUS
By the time the fire gets to the ceiling, the place is going to be pretty much engulfed anyways. OSB will burn fast and hot, and chances are if you are putting it on the ceiling, you have it on the walls. Using that logic, most fires start at the bottom of the structure. You'd be better off drywalling the walls instead of OSB on them. The drywall may be enough to hinder a fire until it can be put out. By the time the flame hits the ceiling......let'er burn
AMCguy
Well-known member
I used screws when I did my last shop with OSB. I'm glad I did because I sold it and had to dismantle it in order to build my new shop.
fteufert
Well-known member
As someone who had a garage fire, the type of wall covering made no difference. The contents burn, and all the wall covering does is keep the heat in. 80+ year old framing is no match for the heat generated by burning plastic, oil, cans of carburetor cleaner, etc. I was lucky my car with 1/8 of a tank of gas didn't blow, or the small propane cylinders for plumbing. Trust me, a fully engulfed garage is better than a partial burn when it comes to insurance.
My new garage has 7/16 OSB on the walls and ceiling, and if it ever burns again, so be it.
My new garage has 7/16 OSB on the walls and ceiling, and if it ever burns again, so be it.
theoldwizard1
Well-known member
Drywall.
strutaeng
Well-known member
I'm building a room in my remodeling home and decided to retrofit a bedroom into a "high-wind resisting room." My wife is paranoid about tornadoes!
Among other things, I'm using plywood for walls and ceilings with a very tight nail spacing using 2 3/8" ring shank pneumatic nails. I'm then installing regular 1/2" drywall over that.
I was initially concerned about the fire rating, but I couldn't find any literature about the fire rating on 1/2" drywall. I did find a resource that stated something like 15 minutes! Anyways, unless you are using 5/8" Type X gypsum board required by your AHJ, I'm convinced 1/2" gypsum board provides little to no better "rating" than regular wood panels.
What's more, a fire rating is usually an assembly rating, meaning firestop at penetrations, etc., which is typically never seen in single-family construction in my neck of the woods (North Texas).
I hope this helps.
Among other things, I'm using plywood for walls and ceilings with a very tight nail spacing using 2 3/8" ring shank pneumatic nails. I'm then installing regular 1/2" drywall over that.
I was initially concerned about the fire rating, but I couldn't find any literature about the fire rating on 1/2" drywall. I did find a resource that stated something like 15 minutes! Anyways, unless you are using 5/8" Type X gypsum board required by your AHJ, I'm convinced 1/2" gypsum board provides little to no better "rating" than regular wood panels.
What's more, a fire rating is usually an assembly rating, meaning firestop at penetrations, etc., which is typically never seen in single-family construction in my neck of the woods (North Texas).
I hope this helps.
Rod N
Well-known member
What about fire proof paint? 
nonhog
Well-known member
I have both sheetrock and OSB.
About time to add more OSB in the shop.
I had a tough time trying to get OSB to burn, your results may vary....... http://www.garagejournal.com/forum/showthread.php?t=149209
About time to add more OSB in the shop.
I had a tough time trying to get OSB to burn, your results may vary....... http://www.garagejournal.com/forum/showthread.php?t=149209
Falcon67
Well-known member
I used 1 5/8" decking screws. A lot of them. No issues and now that a lift is in the plans, easy pie removing sections as needed for clearance and reconfiguration. Same with the OSB on the walls - if adding a plug or doing other mods, I just remove the panel in question.
As for fire - keep the cell handy and plenty of extinguishers - 5 lb if possible in handy places. If you can't snuff it, get the hell out. I have so much combustible material in the shop - race fuel, brake cleaner, carb, cleaner, paint supplies, etc - it doesn't make a s&*t what's on the walls. If the whole thing was metal it'd still burn to a warped mess or blow up. IMHO "OSB is a fire hazard" is a red herring, same as "if OSB get's wet it's junk".
As for fire - keep the cell handy and plenty of extinguishers - 5 lb if possible in handy places. If you can't snuff it, get the hell out. I have so much combustible material in the shop - race fuel, brake cleaner, carb, cleaner, paint supplies, etc - it doesn't make a s&*t what's on the walls. If the whole thing was metal it'd still burn to a warped mess or blow up. IMHO "OSB is a fire hazard" is a red herring, same as "if OSB get's wet it's junk".
Last edited:
maxpower_hd
Well-known member
The fire ratings may vary but I have been told the following:
1/2 Drywall = 30 minutes
5/8 Drywall = 60 minutes
19/32 OSB (roughly 1/2") = 14 minutes
I have always been told to use drywall for any type of fire protection. You are required to use 5/8" drywall between a garage and any occupied space here.
The cost is pretty close so I don't really know what the benefit of using OSB over drywall is. It burns easier, it's about the same price within a dollar or less a sheet, It's harder to prime and paint, it's harder to finish if you want a smooth look, etc. I would just use drywall myself.
1/2 Drywall = 30 minutes
5/8 Drywall = 60 minutes
19/32 OSB (roughly 1/2") = 14 minutes
I have always been told to use drywall for any type of fire protection. You are required to use 5/8" drywall between a garage and any occupied space here.
The cost is pretty close so I don't really know what the benefit of using OSB over drywall is. It burns easier, it's about the same price within a dollar or less a sheet, It's harder to prime and paint, it's harder to finish if you want a smooth look, etc. I would just use drywall myself.