Flameproof Companies

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


About 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 additional manufacturing & distribution facilities in Wisconsin, Texas, and Virginia.

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:

  • D-Blaze Fire Retardant Treated Wood
  • Wolman E MCA 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  |  East Coast

Professional Affiliations & Memberships

ASA – Association of Subcontractors & Affiliates

AWCI – Association of the Wall and Ceiling Industry

CRCA – Chicago Roofing Conference Association

Chicagoland AGC – Chicagoland Associated General Contractors

About Flameproof Companies —

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 turnaround 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
FSC license code: FSC-C01343

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