Attic Insulation & Air Sealing in Erie, PA

Attic insulation and air sealing go together. Warm indoor air rises and escapes through the ceiling at plumbing vents, wiring holes, chimney chases, recessed lights, bath fans, the tops of interior walls and the attic hatch. Insulation alone does not stop it; air moves straight through batts and loose fill. Seal those openings first, then add insulation on top, and the attic stays cold the way it should.

Why it matters so much in Erie

With a normal of 104.3 inches of snow a season according to Wikipedia, Erie roofs carry snow for months. Heat leaking into the attic warms the roof deck, melts the snow from below, and the water refreezes at the cold eaves. That ice dam backs water under the shingles and into ceilings. Heat cables on gutters treat the symptom; a sealed and insulated attic floor treats the cause.

How much insulation

The Insulation Institute's summary of Pennsylvania's 2021 IECC-based code lists R-49 for ceilings in Zone 5. Blown cellulose or fiberglass reaches that depth on an open attic floor for far less than foam, once the leaks are sealed. Foam makes sense where the attic is tight: kneewall attics in Cape Cods and story-and-a-half houses, cathedral ceilings, and finished attic rooms in older city homes.

Ventilation and frost

Snowbelt attics sometimes show frost on nails and sheathing in winter. That is usually warm, moist air from the house reaching the cold roof. Air sealing is the main fix, along with making sure bath fans vent outside and soffit vents are open. We put baffles at the eaves so new insulation does not block the airflow.

What we check first

Roof leaks, damp or stained sheathing, rodent activity, old knob-and-tube wiring and vermiculite. If we find something that should be dealt with before insulation goes in, we tell you before writing the quote.