Our board line is currently rolling and Certified TimberBoard will launch in late 2025!

TimberBoard

Rigid Exterior Continuous Insulation

TimberBoard wood fiber insulation is a rigid continuous exterior insulation for wall, floor, and roof applications, offering superior carbon storage, moisture management and compressive strength.

TimberBoard Technical Specifications

PROPERTY	VALUE
R-Value	R-3.4 — R-3.7 / inch
Thickness Available	Single ply 1”— 9.25”
Length	4’ and 8’
Density	Ranging from 6.8 to 9.4 lb/ft³
Vapor Permeability	40 perm @ 1 inch
Compressive Strength	10-20 psi
Fire Resistance	Meets ASTM E84 Class B Flame / Smoke

Download Spec Sheet

Fire-Resistant

Meets ASTM E84 Class B ratings for flame and smoke spread performance even without the use of borate, with a Class A rated board coming soon.

High Thermal Performance

All-season thermal storage and draft reduction helps to meet Passive House, LEED, and energy stretch code targets.

Acoustic Comfort

Excellent sound absorption supports privacy and comfort in multifamily and commercial interiors.

Lowers Carbon Footprints

Wood fiber insulation naturally stores atmospheric carbon throughout its entire lifecycle, lowering the carbon footprint of the built environment.

Vapor-Open

Provides wind-tight and water-resistant performance that repels moisture without trapping humidity, reducing the potential for mold, rot, or condensation and improving indoor air quality.

Safe to Handle

Itch-free and has no VOCs, formaldehyde, or added toxins. Declare labeled and Red List Free.

We recently completed our first home, insulated with TimberHP. We have been following the development of the company for those last couple years and eagerly awaited the launch of the product. We were excited about TimberHP because it gives us a high-performance insulating package that will allow water to escape and not grow mold or rot the sheathing. An added benefit was the local aspect of the product using a lot of waste material.

Kurt Clason

Clason Remodeling Company – 2022 National Remodeler of the Year

Applications

TimberBoard is suitable for a range of assemblies, whether you’re looking for heat resistance to improve the performance of an older home or want to ensure the resilience and long-term energy efficiency of new construction.

Roofs and Above-Grade Walls

TimberBoard adds robust thermal performance and moisture-resistant durability to roof and wall assemblies—enhancing building envelope strength in both residential and commercial construction.

Flooring

Used beneath flooring systems, TimberBoard helps buffer temperature swings and dampen sound, while providing added structural resilience and a smoother surface for finished floors.

Ceilings

Installed over ceiling framing, TimberBoard contributes to thermal control and acoustic comfort while supporting a continuous, breathable barrier across building levels.

Continuous Exterior Insulation

As a continuous insulation layer, TimberBoard reduces thermal bridging, boosts energy efficiency, and offers exceptional weather resistance—ideal for high-performance building envelopes.