Attic & Roof Deck Insulation in Gulfport, MS

Attic and roof deck insulation matters more on the coast than almost anywhere, because the attic is usually where the air handler and ductwork sit. In a Gulfport summer the air up there can be far hotter than outdoors. Every leak in a duct seam and every thin spot in the insulation lets that heat back into the rooms below. If upstairs bedrooms stay warm at night or the AC runs nonstop in August, the attic is the first place we look.

Option 1: seal the ceiling, then build depth

We close the gaps between the attic and the house: top plates, plumbing and vent stacks, wire holes, recessed lights, the chase around the flue and the attic hatch. Then we blow cellulose or fiberglass to depth. ENERGY STAR suggests R-49 for an uninsulated Zone 2 attic, or adding about R-38 where 3 to 4 inches are already there. Mississippi Power's ceiling insulation rebate needs a finished depth of at least R-38, or about 13 inches.

Option 2: foam the roof deck

We spray open-cell foam under the roof sheathing and close the attic vents. The attic becomes part of the conditioned house, so the ducts and air handler sit in air that is close to room temperature. This usually costs more than blowing in fill but can make a big difference when ducts are in the attic and hard to seal.

What we check first

Roof leaks, stained or soft decking, bathroom fans that vent into the attic, damaged ducts, and signs of rodents. Those get fixed or flagged before any insulation goes in.