Black Mountain insulation is a general purpose natural wool insulation made from hill-farmed sheep (primarily Swaledale and Welsh Black Face) at a site built solely for this purpose. The wool used in the production process is typically the coarsest and darkest available. For years this type of sheep's wool has essentially been a waste product, thus making its use as insulation material even more environmentally and socially friendly. The Black Mountain operation is fully committed to the most stringent environmental standards that can be achieved.
Northwest Natural Insulation offers rolls of Black Mountain material in two widths:
16 inches and 24 inches, in three gauges (thicknesses). Our prices fluctuate with the costs of wool, shipping etc. Contact us for current pricing details.
NOTE: The material is designed to be layered to acheive desired R-Value. For example, to reach R-21, use two layers of the 3-inch material.
Thickness |
R-value |
5 inch |
17.8 |
4 inch |
14.3 |
3 inch |
10.7 |
Contact us for help in determining the amount of material you'll need for your project. These US Dept. of Energy links might be helpful as well:
For general info.
http://www.ornl.gov/sci/roofs+walls/insulation/ins_05.html
For determining the amount of insulation you'll need for a new home:
http://www.ornl.gov/sci/roofs+walls/insulation/fig2.html
…and for an existing home:
http://www.ornl.gov/sci/roofs+walls/insulation/fig3.html