We are the

Flameproof Companies

Manufacturers of Quality Treated Wood Products and Distributors of Commercial Building Materials.


Flameproof Companies

Since 1971 The FLAMEPROOF COMPANIES have manufactured Fire Retardant and Preservative Treated Lumber & Plywood. What began as a small treatment facility in Chicago has now grown into a nationwide operation with manufacturing & distribution facilities in Wisconsin, Texas and most recently, the Pacific Northwest.

Today, The Flameproof Companies is a manufacturer of high-performance treated wood products that specializes in the production of treated lumber, plywood, OSB and engineered wood products featuring a range of superior chemistries including:

  • FlameTechTM Fire Retardant Treated Wood
  • MCA – Micro Pro Life Wood Preservative Treated Wood
  • FX Lumber Guard XT Exterior Fire Retardant
  • MagTechTM Fire Retardant OSB Sheathing
  • Timbers: MCA Preservative Treated
  • Engineered Lumber: I-Joist, LVL, Glulam
  • Metal, Gypsum and Insulation Products
  • Fire Retardant In-Wall Blocking


Chicago   |  Wisconsin   |   North Texas  |   Pacific

Products & Services

Fire Treated

We stock a complete line of fire treated lumber and plywood. We provide quick turn around on special order treated items.

Preservative  Treated

We stock a complete line of preservative treated lumber and plywood. For those hard to find and special order items, you’ll for sure be impressed with our quick turn time & service capabilities.


MagTech™ Fire Retardant OSB Sheathing is the obvious choice for contractors wanting to meet strict building requirements with ease, and can be used in fire-rated wall applications, as well as for fire retardant structural sheathing on exterior and interior walls, pitched roofs, flat roof decks, and floors.

FX LumberGuard® XT

Our FX LumberGuard® XT offers a dual-treatment system that was designed to provide both long term rot protection, as well as Class-A fire protection for use in decking applications and much more.


FSC® Certified Lumber and Plywood (treated and untreated) for all of your FSC or LEED projects. Certificate Code: RA-COC-001997

Building Products

We specialize in non-combustible building materials and hard-to-find commercial industry items such as IPE, Nichiha, 5/4 decking, Gypsum, Metal Studs & Track