Attic Insulation & Air Sealing in Clearwater, FL

Attic insulation and air sealing is usually the first job we suggest in a Clearwater home, because the attic is where most of the summer heat comes from. A shingle roof in full sun turns the attic into a hot box, and the ceiling below it is the only thing between that space and your living room. Air sealing closes the holes in that ceiling; attic insulation slows the heat that comes through what is left. Done together, they are often the most cost-effective comfort upgrade in a Pinellas house.

Why seal before adding insulation

Loose insulation slows heat but lets air pass right through. If warm, damp attic air can move down through a can light or along a wall top plate into the house, piling more fiberglass on top only partly helps. So we seal first. The common leaks are recessed lights, bath and kitchen fans, the attic hatch or pull-down stair, plumbing vents, wiring holes, chases around flues, and the gap where interior walls meet the attic. We use foam, sealant and rigid covers depending on the gap, then insulate over the top.

How much is enough

For new work, the 2023 Florida Building Code, Energy Conservation calls for R-38 in ceilings in climate zone 2, the zone that covers Pinellas County. The U.S. Department of Energy's guidance for existing zone 2 homes is a bit higher: R-49 to R-60 for an attic with no insulation, or adding R-38 to R-49 where 3 to 4 inches already sit on the floor. Plenty of attics we open in Clearwater, Largo and Dunedin hold far less than that, often batts that have been walked on, matted by roof leaks or pushed aside by cable and AC installers.

What we look at in your attic

We measure the existing depth in several spots and note what it is. We check the air handler and ductwork for crushed or disconnected runs, because there is little point insulating around a duct that is blowing cool air into the attic. We look at the roof sheathing for stains and soft spots, check soffit vents for blockage, and look for signs of rodents. Any of those can change the plan.

Floor or roof deck?

Insulating the attic floor keeps the attic vented and hot, and keeps the house below it cooler. It is usually the lower-cost route. If the air handler and ducts are up there, though, they still sit in that heat, and some homeowners choose to move the insulation to the underside of the roof deck instead. We describe that option on our Roof Deck Spray Foam page and will price both if you ask.

Rebates and paperwork

Duke Energy Florida lists attic insulation in its Home Energy Improvement program. Its posted prerequisites include a free Home Energy Check within the past 24 months, an existing attic averaging R-19 or less, and use of a Duke Energy-approved contractor; manufactured homes and multifamily properties are not eligible. Program rules change, so confirm the details and contractor list with Duke before booking any work you plan to claim.

Getting the job done

Most attic air sealing and blown-in work takes a day or less, and you can usually stay home. Attic work in July and August is brutal, so we schedule early in the day where possible. Before anything starts, you get a written quote showing what gets sealed, the material and depth on the floor, the target R-value and the price.

Get a free estimate or call (727) 286-3704 to set up an attic visit.