CertainTeed Attic Air Sealing: The Converse Owner’s Guide
Most CertainTeed attic air sealing jobs in Converse run between $1,200 and $2,800 installed, depending on attic square footage and how many top-plate penetrations, can light housings, and duct chases need sealing. We stock CertainTeed-compatible acrylic latex sealants, polyether foams, and gasketed covers on every truck, and we can usually inspect and seal the same day you call. Homeowners typically figure out something’s wrong when their upstairs rooms won’t stay cool in July despite the AC running nonstop, or when they spot dirty fiberglass around ceiling penetrations, the telltale sign that air is moving through the insulation like a filter.
Which CertainTeed Models This Applies To
CertainTeed doesn’t sell a single “attic air sealing kit” under one model number. What we’re talking about is the system of sealants, foams, and covers specified in CertainTeed’s building envelope documentation, particularly for homes where their blown-in fiberglass (InsulSafe SP, OPTIMA) or spray foam (CertaSpray) was installed without proper air sealing prep. The critical compatibility issue: CertainTeed’s acrylic latex sealant, the stuff they spec for top plates and drywall gaps, is formulated to stay flexible at the temperature swings a Converse attic sees, 40°F winter nights to 140°F summer peak. Generic hardware-store caulk cures hard and cracks within two seasons here.
To identify what you’re working with, look for the yellow CertainTeed insulation bag remnants in the attic, or the small metal spec tags stapled to rafters in newer builds. If your home was built 2015-2020 in neighborhoods like Woodlake or The Heights at Converse, there’s a good chance the original builder used CertainTeed materials but skipped the air sealing step to hit a price point. We carry both OEM CertainTeed sealants and equivalent polyether foams from Owens Corning and Johns Manville that meet the same ASTM C920 spec. For warranty purposes on newer builds, OEM matters. For performance, the spec matters more than the logo.
Signs Your CertainTeed Attic Air Sealing Is Failing
- Dust streaks on insulation around can lights and ceiling fans. Air is being pulled from the conditioned space through gaps in the ceiling plane, carrying dust that deposits on the fiberglass. In Converse, we see this most often in homes with recessed “can” light housings that were never gasketed or foam-sealed to the drywall.
- Hot upstairs rooms that the AC can’t balance. Unsealed top plates, the horizontal framing member where interior walls meet the attic floor, let conditioned air escape into the attic faster than the duct system can replace it. Your thermostat reads 74°F downstairs and 82°F upstairs by 3 PM in August.
- Ice damming or moisture staining on ceiling drywall in winter. Warm, humid indoor air leaks through gaps around plumbing vents and electrical chases, condenses on cold roof decking, and drips back down. Converse doesn’t get Chicago-level snow, but a hard freeze after rain will expose every unsealed penetration.
- Blown-in insulation that looks settled or “dirty” in patches. Air moving through fiberglass acts like a furnace filter, trapping dust and oils. Clean insulation is white or yellow; dirty insulation is gray or brown. The dirt marks the leaks.
- High summer electric bills with no rate change. A blower-door test, the pressurization reading that shows in one number how much air your envelope is losing, will typically read 3,500 CFM50 or higher in an unsealed Converse home of 2,000 square feet. After proper air sealing, that should drop to 2,000-2,500 CFM50.
Before
AfterReplacement Cost & What’s Included
Here’s how pricing breaks down for Converse homes we’ve sealed in the past two years:
- Small attic (under 1,200 sq ft, ranch or townhome): $1,200-$1,800
- Mid-size attic (1,200-2,400 sq ft, typical single-family): $1,800-$2,400
- Large or complex attic (2,400+ sq ft, multiple HVAC zones, vaulted sections): $2,400-$2,800
The range depends on access difficulty, how many can lights need gasketed covers, and whether we need to build foam dams around recessed fixtures rated for contact with insulation. Every job includes: blower-door test before and after, with printed CFM50 readings; all CertainTeed-compatible sealants, foams, and covers; gasketed covers for up to 12 can lights (additional units at $45 each); photo documentation of every sealed penetration; and our 365-Day Done Right Promise backed by a written scope and warranty delivered before anyone starts. Under Haven Standard Clause 1, you get a flat written price before any work starts. No surprises.
DIY or Call Us?
There’s safe checking, and then there’s work that belongs in a respirator and harness.
What you can do: pull your attic hatch, look for the dirty-insulation clues we described above, and take photos with your phone. Check if your can lights say “IC-rated” (insulation contact) or “non-IC” on the housing. Non-IC fixtures need clearance or a cover before any insulation or sealing touches them, and stuffing fiberglass against them is a fire risk.
Where DIY goes wrong: walking a Converse attic in July is 130°F work. Most homeowners miss the top-plate gaps hidden under existing insulation. Polyether foam guns require practice, overfill creates a mess that attracts rodents, and underfill leaves leaks that a blower-door test will expose anyway. And if you’re working near active HVAC or electrical, one misstep is an ER visit or worse. We carry the respirators, the harnesses, and the infrared cameras that show leaks the eye can’t see. Call (830) 420-0953 and we’ll walk through what you found, no charge for the conversation. Seal the leaks first. Then insulate. The numbers will tell you if it worked.
FAQs
How long does CertainTeed attic air sealing last?
Properly installed acrylic latex and polyether foam sealants last 20-30 years, outliving the insulation above them. The failure point is almost always the original installation, not the material. In Converse’s heat-cycling climate, the critical factor is whether the sealant was rated for the temperature swing. Call (830) 420-0953 if you want us to inspect what’s up there now.
Can air sealing be repaired, or does it all need replacement?
Partial repair is common and often the right call. We seal the gaps that have opened or were missed originally, then retest with the blower door to confirm the envelope tightened. Full replacement only makes sense if the existing sealant was the wrong product and is cracking everywhere. We give a free second opinion on any written estimate that says otherwise.
How long does the job take?
Most Converse homes are sealed and tested in one day, 4-6 hours for a typical single-family. Complex attics with multiple HVAC zones or finished vaulted ceilings may need a second day. We schedule a morning start, run the before blower-door test, seal, then run the after test before we leave. You get both numbers on paper.
Do you stock CertainTeed parts on the truck?
We carry CertainTeed-compatible acrylic latex sealants, polyether foams, and gasketed can light covers on every vehicle. We’re an independent service provider, not affiliated with CertainTeed, but we source materials that meet or exceed their spec so there’s no performance gap. For OEM-specific warranty claims on newer installs, we can order factory-labeled product with a 2-3 day lead time.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Converse at Topside Attic Insulation Converse, serving Converse and nearby areas.