Fire Treated Plywood 

Fire treated plywood is specially treated with chemicals that provide a physical barrier to flame spread.  The treated wood chars, but does not oxidize, which significantly reduces the spread and progress of fire in a building. Certain plywoods are also graded "Exterior" which gives it both a fire retardant rating and a treatment to prevent the fire retardant chemicals from leaching out in wet conditions.   


Available Sizes: 


Features & Benefits:

  -All panels are pressure impregnated, and not top-coated, ensuring permanent protection 

  -Class A Fire Treated 

  -When exposed to fire, non-combustible gas and water vapor are produced, and a layer of protective char forms

  -All panels are stamped with their associated fire treatment, and certified 

  -Installs with regular woodworking tools

  -Can lower insurance costs 


Information Request



Q: What is the fire rating for Pyro-Guard Fire Treated Plywood?

A: 20 Minutes

Q: What will happen when fire treated lumber is exposed to fire?

A: The wood will release a non-combustible gas and water vapor, and form a protective layer of char.  The wood will hold its strength for a longer period of time, maintaining the stability of the structure and allowing more time for first responders to control the fire.  

Q: Can I rip fire treated lumber?

A: Panels can be ripped to size.  Lumber cannot be ripped - it can only be cut to length.  

Q: What are the recommended fasteners?

A: Hot dipped galvanized steel or stainless steel 

Q: When should I use exterior fire treatment?

A: Use of exterior fire treated panels are recommended for applications where they are exposed to the weather, dampness, high humidity or cyclical wetting.  For example, an open-air pavilion, multi-family decks, exposed roofs, etc.  

Q: What is the appearance of fire treated lumber?

A: Fire treated lumber will generally have a normal appearance.  The major difference is that all wood will be stamped, signifying its treatment. 

Q:  Can I paint fire treated lumber?

A:  Yes, there are no issues with painting or staining the wood. 


Pyro Guard Product Page

Fire Treated Brochure

Fire Treated Submittal Form



Fiber Source