A 1” hole is drilled into the wall above and below the cross bracing in each bay. We then pump cellulose insulation into the wall under pressure to completely fill the cavities, A plug, patch, seal & primer are then applied. The patches will be ready for paint in the next day or two. Wall insulation not only improves the comfort level in your home, but also improves the sound quality. This process can only be used on existing walls. Fiberglass and blue jean cotton batts are used in additions and new construction projects.