Blown-in insulation, or blow in insulation, products are a fantastic way to bring improved performance per square inch and the least amount of settling over time to the insulation market.

Blown-in insulation refers to blowing or spraying insulation product into wall cavities, attics, and floors. Methods vary depending on the form of insulation selected.

In its loose-fill form, fiberglass is made from glass that is blown or spun into fibers. It is installed using a blowing machine. Loose-fill fiberglass is suitable for attics and wall cavities and can combat common insulation enemies like mildew, fungus, and moisture. Our preferred product is Alcal.
Blow-in cellulose insulation has been around since the 1920s and consists predominantly of recovered or recycled newsprint and/or corrugated cardboard, treated with a fire retardant. Three main types of blow-in cellulose insulation are used in residential application: loose fill, stabilized, and wall-cavity spray.
Spray-in or spray-on polyurethane foam expands to fill cracks and voids to form a tightly sealed barrier. Foams biggest advantage is it virtually eliminates air infiltration. In most cases the foam is mixed on site, where trained professionals do the installation. The spray-on foam is a pretty popular option but it requires higher skill training. Donahoo Roofing is skilled and trained in these methods. Spray foam can be used in attics, ceilings, walls, and floors. When applied, it expands to 100 times its volume to seal cracks and crevices. It also maintains some flexibility as the home ages.

Depending on the product used, foam can provide the highest R-value per inch of the three forms of insulation discussed at 3.6 per inch.

In most home markets, this type of insulation is considered an added home value which pays back over time in the sale of the home.
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