Product description

Wet-spray cellulose is designed for use in attics or wall cavities that are fully open (prior to the installation of the interior finish mate­rial). The sprayed material conforms to any substrate, around pipes, obstructions, and over cracks, reducing air infiltration and forming a highly efficient and effective thermal barrier.

After application, the insulation is planed even with the stud faces by the use of a “stud scrubber” (Fig. 9.2). The scrubber shaves the insulation mass so that it is flush with the face of the studs, thereby creating an insulation “blanket” custom-fit to the wall cav­ity (Fig. 9.3). The wall can be closed shortly after installation of the insulation; however, vapor retarders, as well as some types of paint and vinyl wallcoverings, should not be applied to the inner surface of the wall until the insulation has dried. Moisture-to-fiber ratios influence the drying time required after application. Although these times may vary with each manufacturer, 24 hours is a con­sistent average among most products. Moisture control is critical with wet-blown insulation because overly moist insulation requires a longer drying period before a wall can be closed up. It is also rec­ommended by some that vapor retarders of any type should not be used with spray-applied cellulose. This recommendation may con­flict with some building codes.