Closed cell foam consists of tightly packed cells that prevent air and moisture from entering, making it more rigid and stable than open cell foam.
Asbestos insulation often appears as thin fibers with a greyish-brown or silver-gold color, and a pebble-like texture.
Start by drilling holes at the top of each wall cavity. Next, insert the insulation hose into these holes. As you fill the cavity, gradually pull the hose out to ensure even distribution of the insulation material. Maintain a steady pace while filling to prevent blockages. Continue filling each cavity until you encounter resistance, indicating that the space is fully insulated.