Owens Corning Attic Air Sealing Nationwide

Owens Corning Attic Air Sealing: The Converse Owner’s Guide

Owens Corning attic air sealing systems in Converse typically run $1,800-$3,400 installed for a complete top-plate and penetration seal on a 1,800-2,400 sq ft home, and we stock the full OC Air Sealing System line for same-day starts. Most Converse homeowners discover the problem when their summer electric bill jumps $80-$150 or they feel hot spots in rooms directly below the attic, even with fresh blown-in insulation overhead. The Owens Corning components, including FOAMULAR rigid board gaskets, ProPink sealing tape, and AccuFit acrylic latex sealant, are designed to work as a system - mixing brands or skipping steps is where the performance falls apart.

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Which Owens Corning Models This Applies To

The Owens Corning attic air sealing system isn’t sold by a single model number. It’s a component system, and the parts we match depend on what your attic already has and what’s missing.

Here’s how to identify what you’re working with. Look for the silver-and-pink FOAMULAR XPS rigid foam boards, usually 1/2-inch or 3/4-inch, cut to fit over top plates and around penetrations. Owens Corning labels these with a stamped date code and density rating; boards installed before 2018 may be the older gray-faced version, which is compatible with current ProPink tapes but not the newer AccuFit sealants without surface prep. The ProPink sealing tape comes in 2-inch and 3-inch rolls, printed with the OC logo and batch number - if your tape is peeling or has turned brittle and yellow, it’s past its service life in Texas heat.

AccuFit acrylic latex sealant, the pink-tinted caulk used at electrical and plumbing penetrations, has a 10-year rated lifespan but in Converse’s attic conditions - 140°F+ summer peaks - we see it skin over and crack within 5-7 years. The OEM-versus-aftermarket question matters less here than in mechanical systems; what’s critical is that the replacement materials meet the same ASTM C518 thermal resistance and ASTM D1982 adhesion standards. We stock Owens Corning originals because the tape-to-foam and sealant-to-tape compatibility is tested as a system, but we’ll install equivalent Johns Manville or Knauf components if that’s what matches your existing work. One compatibility gotcha: the 2019-2021 FOAMULAR NGX formulation has a slightly different surface chemistry; standard ProPink tape won’t bond to it without the NGX-specific primer, which we carry on the truck.

Signs Your Owens Corning Attic Air Sealing Is Failing

• Hot ceiling patches in midday summer. Air is moving through unsealed top-plate gaps, the horizontal framing member where your interior wall meets the attic floor, bypassing the insulation entirely. In Converse ranch homes near Foster Road, we see this most in rooms with interior walls that run parallel to the ridge line.
• Dust streaking around ceiling registers or can lights. This is filtration, attic air being pulled through gaps by the HVAC system’s negative pressure. The Owens Corning sealant around your duct boot or light housing has cracked or the FOAMULAR gasket has shifted.
• Ice damming at the eaves in rare freeze events. Warm attic air escaping through bypasses melts roof snow unevenly. Even in Converse’s mild winters, this happens during the January cold snaps that drop into the low 20s.
• Blown-in insulation that looks disturbed or settled unevenly. Air movement across the attic floor scours loose-fill away from the edges. If your ProPink Loose Fill has a bald spot near the eaves, there’s a leak driving it.
• Blower-door test reading above 3,500 CFM50 on a home under 2,500 sq ft. We consider this the diagnostic line. A properly sealed Converse home of that size should test below 2,800 CFM50; anything higher means the envelope has measurable leaks, and the attic is where most of them live.

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Replacement Cost & What’s Included

Most complete Owens Corning attic air sealing jobs in Converse run $1,800-$3,400, with smaller partial seals starting around $950. The range depends on three things: attic square footage, accessibility (truss spacing and whether there’s decking to remove), and how many penetrations need sealing - a home with six can lights, three bath fans, and a chase for a fireplace will take significantly longer than a simple top-plate seal.

Our price includes removal of any failed existing sealant, surface prep, installation of new FOAMULAR gaskets and ProPink tape at all top plates and partition walls, AccuFit sealant at every electrical and plumbing penetration, and a blower-door test before and after. You get the printed CFM50 readings, a Documented Photo Record of every sealed location, and the written scope with our 365-Day Done Right Promise. We don’t start until you have the written price in hand - that’s Haven Standard Clause 1.

DIY or Call Us?

There’s no high-tension danger in attic air sealing like there is with garage door springs or gas lines, but there are genuine hazards. Attic heat in Converse from June through September regularly exceeds 130°F, and footing on joists 10 feet above a hallway is unforgiving. We’ve also found live electrical junctions buried in insulation and active wasp nests in soffit areas that homeowners didn’t know were there.

What you can safely check from below: shine a flashlight into your attic hatch during daylight. If you see light streaming through gaps around chimneys, duct chases, or where walls meet the ceiling, those are leaks. You can also look for the pink FOAMULAR boards; if they’re cracked, displaced, or missing entirely, the system has failed.

What goes wrong with DIY: homeowners often seal the obvious gaps and miss the top plates, which are the largest collective leak in most houses. They also use the wrong caulk - standard silicone won’t adhere to FOAMULAR XPS - or they compress the rigid board so tightly it loses its thermal break function. Seal the leaks first. Then insulate. The numbers will tell you if it worked. If you want the before-and-after blower-door proof, call (830) 420-0953.

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