Perry Blown-In Insulation

Perry Blown-In Insulation, done right the first time.

Blown-in insulation in Perry, IA works in two contexts: open attics where we lay cellulose across the floor to R-49, and existing closed walls where we drill-and-fill from outside. Patriot Gutters & Insulation runs both workflows. Each has its own equipment, prep, and patching.

Cellulose is recycled paper treated with borate. It packs denser than fiberglass batts, has a higher R-value per inch, and air-seals as it settles. For older Perry homes built before the 1970s, dense-pack wall cellulose can close envelope leaks that no batt retrofit reaches.

We blow cellulose at industry-standard density (1.6 lb/cu ft for attics, 3.5 lb/cu ft for dense-pack walls). Anything less drifts or settles. The blower truck stays at the curb; we run hose to attic access or to drill points on the exterior siding.

Perry has a big share of homes from the early 1900s railroad boom, and those balloon-framed walls are the whole reason dense pack matters here. A balloon-framed wall is one long open cavity from the foundation sill to the attic, with no fire stops, and in winter that open channel acts like a chimney pulling cold air up through the house. Batts cannot fix that because you cannot get behind finished plaster. Dense-pack cellulose fills the whole run solid, stops the stack effect, and adds real R-value at the same time.

Central Iowa swings from below-zero windchill to ninety-degree humidity across a single year, so an even, gap-free fill matters more here than in a mild climate. Cold air finds the smallest void. A batt that got compressed around a wire or left a shadow gap behind an outlet box shows up as a cold streak on an infrared camera every January. Blown cellulose flows around the wires, the boxes, and the odd framing you find in a hundred-year-old wall, so there is no void left for the cold to sit in.

On the attic side, blown cellulose is the workhorse for older Perry ceilings that started life at R-11 or R-19. We are not just topping off a bag; we air-seal the ceiling penetrations first so the new material actually performs. Warm household air escaping through a bath-fan gap or a wiring hole carries moisture into the attic, and if that air keeps moving, no amount of loose fill stops the heat loss. Seal, then blow, then set the depth even across the whole plane.

Because cellulose is borate treated, it resists fire, mold, and insects better than untreated fills, which matters in a damp Iowa basement wall or a warm summer attic. The borate is baked in, not a surface spray, so it does not wash out or settle to the bottom. It is one of the reasons we default to cellulose on Perry retrofits instead of blown fiberglass, unless a specific moisture situation calls for the fiberglass instead.