Mold protection

Start before growth appears.

Factory treatment helps inhibit mold growth on the treated lumber through the documented construction and service conditions.

See matching treatments ↓

Forest Service maple sample: sanded left, mold visible right

Photo: Neal Bennett, U.S. Forest Service, Research Note NRS-196, Figure 4. Public-domain government work. The photographed comparison is not a remediation recommendation.

Protect the wood. Manage the moisture.

Construction exposes a frame to changing weather before the building is dried in. Mold-growth inhibition is one part of protecting that material; it works alongside covered storage, drainage and prompt drying.

Store lumber off the ground and under a protective cover.
Keep water from collecting and document the dry-in date.
Address leaks and moisture sources throughout the building’s life.

What supports the protection?

The product evaluations document mold-growth-inhibition testing on treated wood using ASTM D3273 and ASTM D5590. Testing conditions and eligible substrates matter; a laboratory result is not a promise that a building will never develop mold.

What are the limits?

Wood-treatment coverage is not a whole-house mold guarantee or a health warranty. Untreated surfaces, leaks and conditions outside the written terms remain separate responsibilities.

How do warranties fit in?

Coverage depends on the selected treatment, eligible wood, project records and complete written terms. A warranty is a defined remedy, not a promise that damage can never happen.

Review mold warranty options ↗

Choose your system

Treatments for mold protection.

3-in-1 framing protection

2200

The foundational green RezWood™ treatment for qualifying dimensional framing—factory-applied protection against mold growth, fungal decay, and subterranean termites, including Formosan termites. Installation, field cuts, fasteners, and exposure details must follow TER 1511-09.

See 2200 ↗See its warranty options ↗

3-in-1 protection + E84

3300

Coming soon · not yet available to order

Blue-identifiable dimensional framing that combines mold, decay, and subterranean-termite protection with ASTM E84-tested surface-burning performance for projects that do not require code-defined FRT lumber.

See 3300 ↗See its warranty options ↗

4-in-1 FRT protection

4400

The red RezWood™ system combines mold, decay, and subterranean-termite protection with evaluated fire-retardant treatment for qualifying dimensional-lumber applications within TER 1510-01. Rated assemblies require their own applicable documentation.

See 4400 ↗See its warranty options ↗