DIY Home Improvement Forum banner

1 - 9 of 9 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter #1
How to you determine if Plywood is fire rated? I am building a new garage, was told by permit dept, that I need fire rated plywood, I am shopping on the internet, trying to determine if a product is fire rated.
Thanks
Cathy
Camp Taylor, KY
 

·
Registered
Joined
·
11,194 Posts

·
Civil Engineer
Joined
·
5,832 Posts
I believe that all fire retardant plywood is rated by Underwriters Laboratory (UL) and bears the mark FR-S on the wood. If you don't find such a mark, it is not rated. There are a number of companies that make fire rated plywood, I think Hoover is the largest. You may not be able to get this product at the average big box store, you may need a real lumberyard.
 

·
Experienced
Joined
·
2,885 Posts
Welcome cwatts50, to the best darn DIY'r site on the web.

Here another link, fire rated materials should bear a stamp on them which will define the fire rating specification for which the material meets.

http://fireratedlumber.com/

Mark
 

·
Framing Contractor
Joined
·
1,758 Posts
How to you determine if Plywood is fire rated? I am building a new garage, was told by permit dept, that I need fire rated plywood, I am shopping on the internet, trying to determine if a product is fire rated.
Thanks
Cathy
Camp Taylor, KY
Go to a real lumberyard and find out. They will tell you exactly what you need.
 

·
Registered
Joined
·
162 Posts
I think you need to go back to the building/inspections dept and clarify that. I've never heard of any area REQUIRING something as odd as fire retardant plywood. Most depts that require a fire rated wall will specify it by an hour rating, not the materials used to get that rating. I can assume this garage is attached to living quarters or has living quarters above it.
 

·
Experienced
Joined
·
2,885 Posts
I think you need to go back to the building/inspections dept and clarify that. I've never heard of any area REQUIRING something as odd as fire retardant plywood. Most depts that require a fire rated wall will specify it by an hour rating, not the materials used to get that rating. I can assume this garage is attached to living quarters or has living quarters above it.
I also found that a strange requirement, but in my research I found that some jurisdictions require fire rated plywood for the roof structure, I am not sure this is the case in this instance.

It is more likely the requirement is as you state between the garage and the dwelling.

Mark
 

·
Registered
Joined
·
1,378 Posts
I think you need to go back to the building/inspections dept and clarify that. I've never heard of any area REQUIRING something as odd as fire retardant plywood. Most depts that require a fire rated wall will specify it by an hour rating, not the materials used to get that rating. I can assume this garage is attached to living quarters or has living quarters above it.
I have had it required on a few projects now regarding demising wall separations between townhouses. The alternative to placing 4'-0" of fire retardent plywood is to extend the fire wall above the roof plane. Now the OP is dealing with a garage, but the concept might still be similar in trying to protect the dwelling structure from the fire-prone and hazardouse area of the garage.

Original Poster: I would clarfiy with your building department whether they only require the rated plywood against the home, or if they require the whole roof. The inspectors will look for the stamp mentioned above when inspecting for approvals...
 
1 - 9 of 9 Posts
Top