Natural Wool Loose Fill Insulation
Item # : WOOL-LOOSE-BAG-2510 day free blower rental with pallet purchase.
See the Havelock Wool Insulation Blower for more details.
Ordering details
Havelock Wool's loose fill insulation is sold in bags. Old stock contains 25 Lbs of wool per bag and is available while quantities last. New stock contains 30 Lbs of wool per bag and maximizes the shipping value from the increased density.
An ideal installation density is about 1.13 Lb per cubic foot.
Coverage 25 Lb Bag
| R-value | Thickness | SQFT / bag |
| R-15 | 3.5 in | 77 |
| R-24 | 5.5 in | 48 |
| R-31 | 7.25 in | 38 |
| R-40 | 9.25 in | 29 |
Coverage 30 Lb Bag
| R-value | Thickness | SQFT / bag |
| R-15 | 3.5 in | 91 |
| R-24 | 5.5 in | 58 |
| R-31 | 7.25 in | 44 |
| R-40 | 9.25 in | 35 |
Use the Havelock Wool Insulation Calculator to help you estimate how much insulation you need for your home project.
Shipping
- Small orders ship in individual boxes via courier.
- Pallet orders ship LTL on a freight truck. Freight shipments are typically delivered to the curb of the street or driveway, and they include lift-gate service. The freight company will contact you to make an appointment for final delivery.
Description
Loose-fill wool insulation is suitable for blowing into attics, under floors, or into walls. It is a simple, trouble-free method of insulating in cavities that are already closed by blowing in through a hole or in open cavities by using a membrane placed over the open stud bays.
Sheep's wool insulation batts from Havelock Wool are made with 100% wool; no synthetic mix. It is also produced using a proprietary process that yields knops, or balls, that enhance our wool’s ability to trap increasing amounts of air and allows the wool to exceed the R-values of all other insulation mediums except the most toxic: spray foam. At the end of its useful life, our wool is 100% compostable.
Filters air and improves indoor air quality
Harmful chemicals are in your walls. The amino acids in wool irreversibly bond with formaldehyde, NOx and SO2 on a molecular level. For example, tests carried out by the Central Testing Facility in Tokyo, Japan found that when formaldehyde was released into a chamber, wool was able to absorb 96% of the formaldehyde within several hours. This capability is unique to natural fibres.
Moisture and climate control
Moisture and mould happens in your walls. Wool can absorb moisture against 65% relative humidity.
Suppresses mold and mildew
Natural keratin prevents against the spread of mould and mildew.
Absorbs sound
Wool exceeds other forms of insulation as an acoustic buffer and is commonly used to naturally enhance the acoustic properties of a building.
Thermal conductivity
Wool batts are industry standard at R-3.6 per inch; loose-fill outperforms at R-4.3 per inch.
Resists fire
Wool will not support a flame below 1100ºF (593ºC). Havelock wool conforms to Class A of the ASTM E84 test.
All natural
Wool insulation is entirely renewable, biodegradable, and sustainable. It takes approximately 10% of the embodied energy it takes to manufacture fibreglass insulation.
Long lasting
Inherent characteristics allow stated R-values to exceed other forms of insulation.
No off-gassing
Natural characteristics make our insulation devoid of harmful chemicals.
Installs easily
Blow-in and batts are installed like other mediums but with no special protection required.
Documents
Havelock Wool Data Sheet 
Havelock Wool Install Instructions for Loose Fill
Havelock Wool Residential Insulation Calculator
Videos
Check out helpful install videos on the Havelock Wool YouTube page.