Attic Air Sealing & Insulation in Lubbock, TX

Attic air sealing and insulation is the job that changes comfort most in a typical Lubbock house. Summer sun on the roof heats the attic far beyond the outdoor temperature, and that heat pushes down through every gap and thin spot in the ceiling. The attic also holds the ducts and often the air handler, so the cooled air spends its trip through the hottest part of the house. Sealing the attic floor and bringing the insulation to depth is usually the first fix we recommend.

Seal before you add depth

Insulation slows heat, but loose fill does not stop air. Warm attic air and dust slip through recessed lights, the attic hatch, bath fan housings, plumbing and flue chases, wire holes and the top plates of interior walls. We seal those openings with foam, caulk or fitted blocking, then add insulation over them. If we skipped that step, the new insulation would act like a filter and the leaks would keep working underneath it.

How deep is enough

OpenEI lists Lubbock County in Climate Zone 3B. ENERGY STAR's retrofit table recommends R-49 for an uninsulated Zone 3 attic, or adding R-38 where 3 to 4 inches are already in place. The City of Lubbock's 2024 energy code ordinance lists R-38 for ceilings in new work. In Hockley, Lamb and Hale counties, which OpenEI places in Zone 4B, ENERGY STAR raises the bare-attic number to R-60. We measure what you have and write the target depth on the quote.

Blown-in on the floor or foam on the roofline

There are two common ways to insulate an attic here. The first keeps the attic vented and puts the insulation on the floor: seal the leaks, then blow cellulose or fiberglass to depth. HomeGuide lists fiberglass at R-2.2 to R-2.9 per inch and cellulose at R-3.1 to R-3.8, so reaching R-38 or R-49 takes a deep layer. This is usually the lower-cost route.

The second moves the insulation to the roofline: spray foam under the roof deck and on the gable walls, so the attic becomes part of the conditioned space. That matters when the ducts and the air handler are in the attic, because they no longer sit in summer heat. It costs more, and it is a bigger change, so we explain both and price both when they both make sense.

Ducts in the attic

The City of Lubbock's code ordinance requires at least R-6 on supply and return ducts in attics. Older ducts often have thinner wrap, torn jackets or loose joints. We note duct condition on the visit. If the plan keeps a vented attic, sealing and burying the ducts where practical helps; if the plan is a foam roofline, the ducts end up inside the insulated space.

What we check on the visit

We measure the existing depth, look for damp spots or roof leaks, check the hatch, fans and lights, and look at the ductwork and any gas appliances in the attic. If the old insulation is soiled, packed down or full of debris, we may recommend removal before adding new.

Tell us how hot the upstairs gets, how old the house is and whether the air handler is in the attic. We will inspect and send a written price. Get a free estimate