Insulation

Blown-in Insulation
Insulation is "blown in" to walls through small holes drilled in-between studs. The insulation most commonly used in this process is cellulose (which is comprised of up to 85% recycled newsprint). Cellulose insulation contains a mixture of borate and ammonium sulfate that functions as a fire retardant. [].

Another method involves using cementitious foam which is derived from air, water and cement. It does the best job at getting around items in the walls such as wires, and it produces no dust, however it is more expensive.

Possible Concerns:
 * Avoid cellulose materials containing formaldehyde and mineral fibers. []

Ottawa-area companies providing blown-in insulation services include:
 * A. Mackay & Sons Insulation - 4100 Larry Robinson Rd, Ottawa, (613)821-2373
 * Wooly Insulation Inc - 1-888-74 WOOLY, wooly@execulink.com