Havelock Wool Batt Insulation

We have applied our insulating technology to traditional batt insulation. Historically batts were made with toxic bonding agents necessary to create a low-cost insulating product with some ability to maintain shape. Our batts are made with 100% wool, no synthetic mix, and are bonded with a needle punch, not chemicals.

Unlike other forms of insulation our batts are easy to handle. They do not require protective clothing or safety equipment like respirators, gloves or heavy clothing to install: they are safe to the touch.

These characteristics have earned us the label as the ultimate in DIY for home insulation.

batt insulation

wool batt insulation

What is Batt Insulation?

Batt insulation takes a rectangular shape and it is designed to slide into the cavity of your interior walls. It is the cheapest and most common type available in the market. The efficacy of batt insulation is increasingly scrutinized by industry practitioners though the ease of install will allow for its dominant usage to persist.

Benefits of Wool Batt Insulation

Our product is all-natural, renewable and sustainable in it’s production, while being compostable at the end of an extended useful life. Wool is inherently self-extinguishing and manages moisture against 65% relative humidity. When it comes to energy efficiency, our batts perform similarly to other forms of insulation with an R-value of 3.6 per inch. Unlike others, no protective clothing is required for installation and one can argue the process is even a bit of fun.

wool batt insulation

The Ultimate in DIY Insulation

wool batt insulation

Easy to Install – Not Rigid

loose fill insulation

No Facing

loose fill insulation

Passive Filtration

loose fill insulation

Moisture Management

loose fill insulation

Sound Absorption

Installation Procedures

Batts are typically cut at 48” and may need to be stretched slightly upon removal from packaging. Unfaced batts are applied with friction. A staple may be added at the installers discretion. Wire or lightning rods may be used in a ceiling joist or with metal framing.

This video covers all aspects of batt installation: tools and materials needed, job site preparation and technique.

Composition & Materials

Havelock Wool batts have no formaldehyde or chemical bonding agent of any sort.

Our batts are comprised of 100% wool. Unlike other options, there is no synthetic mix in our products which means there is no glue or bonding agent. This greatly reduces the net embodied energy in our production process as no high heat is required. By comparison, mineral wool batts are bonded with extreme heat and the binder is formaldehyde.

Our batts are produced employing a mechanically driven needle punch. As a result, they are malleable, not rigid or difficult to manipulate. Some care should be taken in handling with an emphasis on the needled side, which should face out from the wall cavity.

Sizing & Coverage

R Value Thickness Width S/F per bag
7 2.0″ 15.5″ 100
13 3.5″ 15.5″ 90
20 5.5″ 15.5″ 60

Technical Data

Compliance: California Bureau of Thermal Insulation: License #T1500 / Registry #CA-T500

Physical Properties:

havelock wool insulation


Surface Burning
Fire Hazard
Thermal Conductivity

havelock wool insulation


Smoke Developed (Class A)
Flame Spread (Class A)
Resistance Value
Sound Absorption Coefficient

havelock wool insulation


ASTM E-­84
ASTM E-­84
ASTM C-­518
ASTM C-­423

Absorption Coefficients *

125 250 500 1000 2000 4000 NRC
0.72 0.94 0.91 0.85 0.93 0.98 0.90

*The Noise Reduction Coefficient (commonly abbreviated NRC) is a scalar representation of the amount of sound energy absorbed upon striking a particular surface. An NRC of 0 indicates perfect reflection; an NRC of 1 indicates perfect absorption.

Connect with the Havelock Flock

It is our goal to produce a truly superior building product with unrivaled integrity. We work exclusively with those who appreciate alternative building products and a healthier, more sustainable ecosystem. We are actively building consumer awareness concerning conventional toxic building materials.

wool batt insulation