Spray Foam Insulation in Lewisville, TX

Spray polyurethane foam is combustible and must maintain the clearance to combustibles required by NFPA 211 and the appliance listing, which means it cannot be applied against a masonry chimney or metal flue without the required non-combustible separation. Because foam is applied as an expanding liquid, it readily fills the very gaps where clearance is mandatory. A correct installation establishes a non-combustible barrier and preserves the air space around any flue or heat source.

Yes. Building codes require spray foam in attics and crawlspaces to be covered by a thermal barrier, or an approved ignition barrier in limited-access spaces, because exposed foam contributes to fire spread and smoke. That covering is a life-safety requirement, not a finish preference. We install foam with the required barrier so the assembly meets fire-protection requirements rather than leaving combustible foam exposed in the structure.

Significantly, and it has to be planned for. Spray foam creates a tight, often unvented assembly, which changes the air available for any combustion appliance and can affect how naturally drafted equipment vents. Atmospherically vented appliances inside a newly tightened envelope may require combustion-air provisions or reassessment. We evaluate what combustion equipment is present before sealing the envelope, because tightening a house around an unaddressed draft path is a carbon monoxide concern.

Only with the correct non-combustible detailing. The clearance between a chimney or flue and combustible materials must be maintained with appropriate firestopping at the chase, and combustible foam cannot bridge that gap. The chase opening is firestopped with non-combustible material to code, and foam is kept off the flue. Done properly, the chase is air-sealed for energy performance while the required clearance and firestop around the chimney remain intact.

Because sealing the envelope changes the conditions every combustion appliance, vent, and moisture path operates under. Water heaters, furnaces, and any fuel-burning equipment may need combustion-air or venting adjustments, and existing moisture sources behave differently in a tighter assembly. Assessing the appliances, venting, and existing clearances first ensures the tighter, more efficient envelope does not compromise safe venting or trap moisture, which is the difference between an upgrade and a hazard.

Yes — our crews cover Lewisville's 5 ZIP codes across Denton County, including Castle Hills, Vista Ridge, Old Town, plus the surrounding communities.

We offer same-week scheduling across Lewisville, booked by a real person in under two minutes, 7 AM to midnight every day.

Lewisville's housing stock spans 1980s-90s subdivisions through Vista Ridge's newer construction, which means our CSIA-certified inspectors encounter everything from aging clay-tile flue liners to prefab factory-built fireplaces nearing the end of their listed service life. Around Castle Hills and the Highland Village line, the dominant call is the NFPA 211 Level 2 inspection triggered at sale or after a chimney fire, where we scan for creosote glazing and liner cracks a flashlight check would miss. In Old Town's older brick homes, deteriorated mortar joints and spalling are the recurring safety findings we document against code. Spray Foam Insulation is part of keeping that local housing stock safe, efficient, and up to code.