TimberBatt
High-Performance Thermal and Acoustic Cavity Batt Insulation
TimberBatt is a flexible, high-density wood fiber batt insulation engineered for superior thermal, acoustic, and moisture performance in modern assemblies. It is also itch-free, making it comfortable and easy to handle and install.
TimberBatt Technical Specifications
| PROPERTY | VALUE |
|---|---|
| R-Value | R-3.7 to R-4.0+ / inch |
| Thickness Available | 3”, 3.5″, 5.5″, 6”, 7.25″ |
| Width | 15″, 23″ (wood stud), 16”, 24” (steel stud) |
| Length | 47″ (wood stud), 48” (steel stud) |
| Density | ~3 lb/ft³ |
| Vapor Permeability | 46 perms @ 1 inch |
| Fire Resistance | Meets ASTM E84 Class A Flame / Smoke |
| Sound Absorption (NRC) | 1.15 (3.5″ batt) |
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Fire-Resistant
Achieves ASTM E84 Class A for flame and smoke spread through the use of liquid borate, which saturates the wood fiber and provides a superior long-term solution for fire, bug, and moisture/mold resistance.
High Thermal Performance
All-season thermal storage and draft reduction meets 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 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.
For our first house, we used the blown-in fiber and the 6” batts. The friction fit of the batts and the ease of install vastly surpassed mineral wool, and not being itchy at the end of the day was a nice side effect. We were blown away with how the house was instantly quieter and felt more solid. I am confident that the long range insulating qualities that TimberHP provides will be far greater than a cellulose/mineral wool type home.”
Kurt Clason
Clason Remodeling Company – 2022 National Remodeler of the Year
Applications
TimberBatt is suitable for a range of assemblies and for use in both retrofit and new construction projects.
Interior & Exterior Wood-and Metal-Framed Walls
TimberBatt fits snugly between studs in wood- or metal-framed walls, delivering exceptional thermal resistance and vapor-permeable moisture control—ideal for both interior comfort and exterior energy efficiency.
Sloped Roof Rafter Bays
In sloped roof assemblies, TimberBatt’s high-density composition ensures consistent insulation without sagging, while its breathable structure helps regulate moisture and prevent condensation buildup under the roof deck.
Floor and Ceiling Cavities
TimberBatt insulation helps reduce heat transfer and airborne sound between floors and ceilings, making it a smart choice for improved comfort and quieter spaces in single- or multi-level buildings.
Acoustic Insulation in Multifamily and Light Commercial Buildings
With superior sound-dampening capabilities, TimberBatt is an effective solution for reducing noise transmission between units or rooms—enhancing acoustic privacy in multifamily housing and commercial spaces.
Downloads
Installation
TimberBatt is designed for ease of use on site.
Easy to install with a friction-fit design that maintains durability and stability in cavities with no slumping over time, and resists settling, sagging, and deformation in wall and roof assemblies. Cuts easily with a handsaw or insulation knife.
- Cut to fit with hand saw or insulation knife
- Glove-free install; no itchy fibers
- Friction-fit between studs, rafters, and joists
- Compatible with vapor-variable membranes and other vapor-open assemblies
Download our full Installation Guide, or watch our installation how-to video for step-by-step details and best practices.
Tools & Accessories
To achieve the best results when cutting and fitting TimberBatt insulation, the following tools are recommended for clean, efficient installation.
Bahco Insulation Saw
Durable and ergonomic with a stainless steel blade—great for straight and detail cuts.
Available Here
Custom TimberBatt Knife
Excellent for thicker batts or fast repetitive cuts. Serrated edge grips and slices easily through dense fiber.
Available Here
Linzen TimberBatt Knife
For volume cuts or production-speed installs, especially on larger jobs.
Available Here
Hyde Square Point Knife
Excellent for clean plunge cuts, and comes with a wooden handle.
Available HereUse a timber offcut or cutting table underneath for safer, cleaner cuts and less mess on site.
TimberBatt FAQs
Q: What code compliance does TimberBatt meet?
A: TimberBatt insulation meets IRC and IBC insulation requirements and ASTM fire and vapor standards. For third-party testing documentation, see downloads.
Q: Can I use TimberBatt in commercial construction?
A: Absolutely. TimberBatt is well suited for commercial interiors, multifamily housing, schools, and offices. Reach out to our team for assemblies and detailing support.
Q: Is TimberBatt fire-resistant?
A: Yes, TimberBatt and all TimberHP wood fiber insulation products are fire resistant. TimberBatt achieves a ASTM E84 Class A rating for flame and smoke spread – the highest fire resistance rating for building materials – and is treated with liquid borate, which saturates the wood fiber and provides a superior long-term solution for fire, bug, and moisture/mold resistance.
Q: What’s the difference between TimberBatt and TimberFill?
A: TimberBatt is a batt insulation designed for framed cavities. TimberFill is a loose-fill alternative for open blow or dense-pack applications.
How Can We Help?
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Our support team is ready to provide answers to your questions or concerns.
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