Greater Houston
Home Insulation in Greater Houston
At Phantom Foam, we deliver expert home insulation services tailored to Houston’s humid and hot climate. We specialize in high-performance solutions like spray foam, blown-in, cellulose, and radiant barriers — installed by trained crews who understand what Gulf Coast conditions demand.
Lower Energy Bills
A properly insulated envelope stops HVAC from running overtime during Houston’s brutal summers.
Consistent Comfort
Eliminate hot rooms, cold spots, and uneven temps throughout every level of your home.
Moisture Control
The right insulation assembly stops humid air infiltration and prevents condensation damage.
Healthier Indoor Air
Sealed building envelopes block dust, pollen, and allergens from infiltrating living spaces.
Attic Insulation
The attic is the number one source of energy loss in Houston homes. We install the right system for your attic configuration — vented floor deck or unvented roofline — to meet or exceed the R-30 to R-60 code targets for Brazos County and greater Houston.
Spray Foam Attic
R-3.5–7 per inch depending on open or closed cell. Insulates and air seals in a single pass — critical for humid climates. Applied to roof deck or floor joists depending on strategy.
Blown-In Attic
R-3–4 per inch. Fiberglass or cellulose blown to code depth over the attic floor. Cost-effective for retrofits when air sealing is addressed separately first.
Code Targets
Houston area code requires R-30–60 for attic assemblies. We confirm strategy — vented vs. unvented, floor vs. roofline — before recommending a system.
Wall & Ceiling Insulation
Walls and ceilings account for a significant portion of heat gain in Houston homes. Code targets are R-13–15 for exterior walls and R-19–30 for ceilings. Product selection depends on wall assembly, existing construction, and vapor management requirements.
Fiberglass Batts
R-3–4 per inch. Standard for new construction walls. Works best when framing cavities are tight and air sealing is completed at all penetrations before installation.
Cellulose
R-3.2–3.8 per inch. Dense-pack cellulose fills irregular cavities completely and provides good air resistance. Frequently used in retrofit wall applications.
Spray Foam Walls
R-6–7 per inch closed-cell. Superior moisture and air control for exterior-facing assemblies. Recommended for rooms with persistent comfort issues or humidity problems.
Crawl Space & Floor Insulation
Houston’s humidity makes crawl space management critical. Moisture intrusion from an unsealed crawl space drives mold, wood rot, and elevated indoor humidity throughout the home. Code target for floor assemblies is R-10 or higher.
Radiant Barrier
R-2–5 effective. Reflective foil installed in crawl spaces to reduce radiant heat transfer from the ground. Often combined with other insulation for full-spectrum performance.
Rim Joist Foam
Closed-cell spray foam at the rim joist stops the most common crawl space air bypass. Critical for homes with pier and beam foundations common throughout Houston’s older neighborhoods.
Blown-In Floor
R-3–4 per inch. Blown insulation between floor joists provides thermal performance. Best paired with crawl space encapsulation and air sealing to prevent moisture absorption.
Foundation Insulation
Slab-on-grade foundations common in Houston benefit from perimeter and under-slab insulation to reduce heat transfer and moisture wicking. Code targets R-10 for slab edge assemblies. Product selection depends on existing foundation type and site conditions.
Closed-Cell Foam
R-5–7 per inch. Highest performance option for below-grade and slab-edge applications. Moisture-impermeable and structurally adhesive — bonds to concrete without adhesives.
Rigid Boards
R-5 per inch. Extruded polystyrene (XPS) or polyisocyanurate boards for perimeter slab insulation during new construction. Cost-effective when installed during the pour.
Cellulose Fill
Used in some pier and beam foundation applications to fill under-floor cavities. Works best when combined with proper vapor barriers and crawl space moisture management.
Insulation Type Comparison
Every product has strengths and best-fit applications. Houston’s climate — hot, humid summers and mild winters — often favors spray foam for air sealing and vapor control, with blown-in and cellulose as effective complements in eligible assemblies.
| Type | R-Value / Inch | Air Sealing | Vapor Control | Best For |
|---|---|---|---|---|
| Spray Foam (Closed-Cell) | R-6–7 | Excellent | Excellent | Attics, walls, crawl spaces, metal buildings |
| Spray Foam (Open-Cell) | R-3.5–4 | Excellent | Permeable | Roof decks, interior walls, sound control |
| Blown-In Fiberglass | R-3–4 | Poor | Permeable | Attic floors with separate air seal |
| Cellulose | R-3.2–3.8 | Moderate | Permeable | Attic retrofits, wall dense-pack |
| Radiant Barrier | R-2–5 effective | None | Varies | Crawl spaces, attic decking supplement |
Our Process
Every home insulation project follows the same proven process — from free assessment to final documentation.
- 01
Free on-site assessment — inspect every insulation zone, take moisture readings, identify leaks and gaps.
- 02
Product recommendation — match the right insulation type to each area based on assembly, budget, and code requirements.
- 03
Professional installation — trained crews with commercial equipment. Surfaces protected, foam applied in controlled lifts.
- 04
QA & documentation — depths verified, site fully cleaned, close-out documentation provided on request.
Frequently Asked Questions
How does Houston’s humidity affect insulation choice?
Humidity makes vapor control critical. Closed-cell spray foam acts as both insulation and vapor retarder — important in assemblies where moisture infiltration could cause condensation or mold. Open-cell and fibrous products are permeable and need vapor management strategies.
What does the installation process involve?
We inspect the space, confirm substrate conditions, mask adjacent surfaces, establish ventilation, and apply the product in controlled passes within manufacturer lift limits. Family and pets re-enter after the product-specified curing window — typically 24–48 hours for spray foam.
Blown-in vs. fiberglass batts — which is better?
Blown-in fills irregular cavities more completely than batts and is better for retrofits. Batts work well in new construction with clean, consistent framing. Neither stops air movement on its own — both need air sealing at all penetrations to perform at rated R-value.
Do radiant barriers work in Houston?
Yes — radiant barriers reduce heat gain from hot roof surfaces, which is particularly relevant in Houston’s climate. They work best when combined with proper attic ventilation and are not a substitute for bulk insulation R-value.
Can you insulate my foundation?
Yes — we handle slab perimeter insulation and under-floor assemblies for pier and beam foundations. Product selection depends on site conditions, existing construction, and whether the work is new construction or retrofit. We assess on-site before recommending.
Is cellulose better than blown-in fiberglass?
Cellulose has slightly higher R-value per inch and better air resistance than loose fiberglass. It’s made from recycled content and tends to settle less. Both are effective in attic applications when installed to correct depth and combined with air sealing.
Are rebates or financing available?
Yes — 0% interest financing for 12 months is available through Wells Fargo Home Projects for qualifying purchases. Ask about available utility rebates in your area at the time of your free assessment.
Can spray foam insulate interior walls?
Yes — open-cell spray foam is commonly used in interior walls for sound control and thermal performance between conditioned spaces. Closed-cell is available for specific assemblies where moisture or structural requirements justify the higher cost.
Serving Greater Houston
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