While they try, other mediums like mineral wool, cotton or glass wool insulation cannot measure up to the capabilities of Havelock's sheep wool insulation. Wool's inherent characteristics allow it to physically breathe by allowing moisture to be absorbed and desorbed against 65% relative humidity. Harmful chemicals, such as formaldehyde, nitrogen oxide and sulphur dioxide, are actually removed from the air. No other type of insulation offers this unique function. In fact, most others are often emitting harmful chemicals and/or adversely affecting indoor air quality.

Brochure Download 

For more facts and data about wool as an insulator, please download an informational brochure and bring your residential or commercial insulation project into the realm of sustainable, non-toxic performance.

Smarts walls

Farm to walls

Wool's Benefits 

ALL NATURAL - Wool insulation is entirely renewable and sustainable

MOISTURE CONTROL -  Wool naturally manages moisture levels against 65% relative humidity

FIRE RESISTANT -  Wool is inherently known to extinguish after smoldering 

LONG LASTING - Extensive useful life

NO HARMFUL CHEMICALS - Natural characteristics allow our insulation to be devoid of harmful chemicals

NOISE REDUCTION  - Wool creates acoustic advantages in minimizing airborne sound

DISPOSAL - Wool insulation can be composted at the end of an extended useful life

INSTALLATION - Blow-in and batts are installed like other mediums but with no protection required

Wool's Construction

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Principal components are protein molecules, or Keratin. Each is made of hundreds of amino acid units that bind together in a way that allows for wool's unique characteristics

A wool fibre is resilient and elastic; it can be bent on itself over 20,000 times, yielding a longer life than most fibres

The scaled structure allows for absorption and retention of airborne dust.  The helical nature also lends to enhanced sound absorption

Volatile chemicals, such as formaldehyde, are naturally consumed from the atmosphere and retained

Wool's principal component being Keratin means it is biodegradable

Wool vs Synthetics diagram

Havelock Wool

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

Physical Properties:

Property                                                       Performance                                                           Test
Surface Burning                                           Flame Spread (Class A)                                         ASTM    E-84
Fire Hazard                                                  Smoke Developed (Class A)                                 ASTM    E-84
Thermal Conductivity                                  Resistance Value – see chart below                      ASTM    C-518

Havelock Wool offers both batt (blanket rolls) and blow-in insulation. Our R values are 3.6 per inch and 4.3 per inch respectively. "R" means resistance to heat flow and the higher the insulation R-value, the greater the insulating power. Our wool insulation R-values are equal to or often surpasses those of non-wool insulation. The extreme high integrity of a wool fiber allows it to out perform the synthetic competition with an exponentially decreased environmental impact.


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