New Construction Spray Foam Insulation in Houston, TX
Your Builder Partner – Pricing Primarily by the Set of Foam for Predictable Project Costs
★★★★★
4.7 Star Rated
Houston builders & homeowners
Licensed & Insured
State of Texas certified crews
1–2 Day Install
Standard single-family homes
50+ Cities
All of Greater Houston
Mon – Sat
Flex scheduling around your trades
New Construction Spray Foam — Builder Partner — Houston, TX
The Spray Foam Subcontractor
Houston Builders Can Actually Rely On
Phantom Foam partners with custom home builders, production builders, and developers across Greater Houston to deliver spray foam insulation on new construction that shows up on schedule, installs correctly the first time, and delivers the documentation your team needs for smooth inspections and homeowner closeouts.
New construction spray foam is a different job than retrofit insulation — and builders in Greater Houston know the difference between a foam subcontractor who understands construction sequencing and one who does not. The window for spray foam on new construction is specific: framing complete, rough-in inspected and cleared, sheathing in place, and the building still open before drywall. Miss that window and you are either pulling back scheduled trades or doing a more expensive retrofit later. Phantom Foam understands where spray foam lives in the construction sequence and works to hit your window without creating disruption to the framing, electrical, or mechanical crews working adjacent.
Greater Houston's Climate Zone 2A makes spray foam insulation more than a premium upgrade on new construction — it is the specification that delivers the energy performance, moisture management, and comfort level that buyers in the Houston market expect from a new home. Homes built with a properly specified spray foam assembly in the attic and exterior walls consistently outperform code-minimum fiberglass installations on every metric that matters to buyers: energy bills, indoor humidity, HVAC runtime, and the subjective feel of the home. Builders who deliver that performance get referrals. Builders who deliver a home that runs hot and humid in July do not.
1–2 Days
Install time for standard
single-family home
single-family home
Up to 50%
Energy savings vs
fiberglass code minimum
fiberglass code minimum
Climate 2A
Houston IECC zone —
highest humidity demand
highest humidity demand
Full Docs
Certs, coverage reports
& builder packets
& builder packets
The Houston Building Science Case
Why New Construction in Houston
Demands More Than Fiberglass
Code minimum fiberglass insulation passes energy inspections in Houston. It does not deliver what buyers expect, and it does not protect the building envelope the way the climate requires.
The International Energy Conservation Code requires R-38 in attics and R-13 in exterior walls for Climate Zone 2A — the Houston code zone. Fiberglass batts in a 2x4 wall cavity deliver R-13 on paper. In practice, they deliver significantly less because they leave gaps around wiring, plumbing, and irregular framing, they do not air seal any of the penetrations through the top and bottom plates, and they rely on the drywall and sheathing to function as an air barrier — which neither does in a typical production framing job. The result is a home that meets the letter of the energy code and fails the spirit of it consistently.
The U.S. Department of Energy identifies air leakage as responsible for 25 to 40 percent of a typical home's energy loss. Spray foam eliminates air leakage at the assembly level — it fills every gap, seals every penetration, and bonds to framing on all sides of the cavity. A spray foam attic assembly at R-38 outperforms a blown-in fiberglass attic at R-60 in Houston because the foam eliminates the air bypass that accounts for the majority of energy loss. Buyers do not understand building science, but they do notice when their new home's AC runs less, their utility bills are lower, and the second floor is actually comfortable in August. Those are the outcomes spray foam delivers that fiberglass does not.
Moisture management is the second critical factor. Houston's year-round humidity above 70 percent and dew points that regularly hit 74°F in summer mean every new home in Greater Houston is under sustained vapor pressure from the exterior. A properly specified spray foam assembly manages vapor drive at the correct location in the building envelope — exterior walls get closed cell foam as a continuous insulation layer and Class II vapor retarder on the sheathing face, attic rooflines get open cell foam to create a conditioned attic assembly where duct systems perform efficiently. Builders who specify spray foam deliver homes that are genuinely comfortable in Houston's climate. Builders who spec fiberglass deliver homes that buyers call back about in year one.
New Construction Specifications
Standard Assembly Specifications
for Houston New Construction
These are the assemblies Phantom Foam installs most frequently on new construction in Greater Houston, with the product, thickness, and performance rationale for each location in the building envelope.
Attic Roofline — Unvented
Open cell spray foam applied to the underside of the roof deck. Creates a conditioned attic assembly that puts ductwork inside the thermal envelope. Delivers R-38 to R-44 at 9 to 11 inches. Most common and highest-impact new construction application in Houston.
Open Cell · 9–11"
Exterior Walls — Continuous Insulation
Closed cell spray foam on the sheathing face of exterior wall framing before stud cavities are filled. Creates a continuous vapor retarder at the correct location in the assembly, breaks the thermal bridge through every stud, and air seals the full wall plane. Remaining cavity filled with open cell or batt.
Closed Cell · 1–2"
Exterior Walls — Full Cavity Spray
Open cell spray foam filling the full 3.5-inch stud cavity. Air seals the entire wall plane, fills around wiring and plumbing completely, and delivers R-13 with no gaps or voids. Used where budget favors open cell over closed cell continuous insulation strategy.
Open Cell · 3.5"
Rim Joists & Sill Plates
Closed cell spray foam on rim joists, sill plate interfaces, and foundation wall top edges. Eliminates one of the highest air leakage and moisture entry points in any new home. Essential for pier-and-beam construction throughout the Houston inner loop and older suburban markets.
Closed Cell · 2"
Crawl Space Walls — Encapsulation
Closed cell spray foam on crawl space foundation walls, rim joists, and pier wraps. Creates a conditioned crawl space assembly that eliminates ground moisture entry, protects subfloor framing, and reduces whole-house humidity. Pairs with ground poly for full encapsulation.
Closed Cell · 2"
Interior Walls — Sound
Open cell spray foam in interior partition walls adjacent to bedrooms, bathrooms, home theaters, and mechanical rooms. Provides meaningful acoustic separation that fiberglass batts cannot match. Increasingly specified by custom builders as a standard feature in Houston luxury new construction.
Open Cell · 3.5"
Garage Ceiling — Conditioned Space Above
Open cell spray foam in the garage ceiling cavity below a bonus room or conditioned second floor. Provides both thermal separation from the 120°F garage environment in Houston summer and acoustic separation from garage noise. Critical for bonus room comfort in two-story Houston homes.
Open Cell · Full Cavity
Vaulted Ceilings & Cathedral Assemblies
Open cell spray foam filling the full rafter cavity at the roof deck — eliminating the need for a ventilation channel that reduces available insulation depth in vaulted assemblies. Creates an unvented assembly with full R-value at the roofline and simplified detailing at the ridge.
Open Cell · Full Rafter
The Builder Partnership
What Phantom Foam Delivers
to Builder Partners in Houston
Every builder partnership is built on the same foundation: show up when scheduled, install correctly, leave the site clean, and deliver the documentation the builder needs. Here is how Phantom Foam executes on new construction.
Construction Sequence Awareness
No Trade Conflicts · Right Window · Pre-Drywall Timing
Spray foam has a specific window in the construction sequence: framing complete, rough-in inspected, sheathing in place, before drywall. Phantom Foam understands where spray foam lives in the Houston construction sequence and coordinates with your superintendent to hit the window without creating conflicts with electrical, plumbing, or HVAC crews. We confirm the window is clear before mobilizing and communicate any site conditions that could affect installation. Builders who have worked with foam contractors who showed up at the wrong phase know how disruptive that is — we do not do that.
Air Sealing Before Foam
Top Plates · Penetrations · Duct Chases · Recessed Lights
The biggest mistake in spray foam new construction installs is skipping the air sealing step before foam application. Foam applied to the attic roofline without sealing the top plates, electrical penetrations, recessed light housings, duct chases, and plumbing stacks leaves the primary air leakage pathways wide open. Phantom Foam air seals all penetrations before applying foam — every top plate, every electrical box penetration, every duct chase, every plumbing stack. This is the step that separates a spray foam assembly that actually delivers the energy performance from one that passes the visual inspection but disappoints the homeowner. We include air sealing in every attic assembly quote — it is not an add-on.
Code-Compliant Thermal Barriers
Drywall Requirement · Ignition Barrier · Jurisdiction Confirmed
Spray polyurethane foam requires a thermal barrier before it can be permanently exposed in occupied or semi-occupied spaces — typically half-inch drywall or an approved ignition barrier product. The specific requirement varies by jurisdiction, code cycle, and application type. Phantom Foam confirms the thermal barrier requirement for your specific project and jurisdiction before installation and documents the requirement in the written specification. We do not leave builders with foam-exposed assemblies that will fail inspection — we flag the requirement upfront and include it in the installation plan.
Clean Jobsites
Surfaces Masked · Overspray Controlled · Complete Cleanup
Spray foam overspray is the most common complaint builders have about foam subcontractors. Foam that drifts onto framing, windows, mechanical equipment, or finished surfaces creates cleanup problems that delay subsequent trades. Phantom Foam masks all surfaces adjacent to the foam application area before spraying — windows, HVAC equipment, electrical panels, and finished surfaces are protected. Overspray is controlled through equipment setup and application technique. The site is cleaned completely before we leave — trim, drill dust, and any foam debris are removed. Your next trade walks into a clean space, not a cleanup problem.
Depth Verification & Coverage Documentation
Installed Depths Confirmed · Photo QA · Coverage Reports
Every Phantom Foam new construction project includes installed depth verification before we leave the site. Attic assemblies are probed to confirm R-38 minimum is achieved throughout. Wall cavity assemblies are verified for full coverage and confirmed thickness. We document the verification with photos and provide a coverage report that confirms installed thicknesses across all assembly locations. This documentation is part of your builder packet and is available for energy auditors, blower door testers, and certificate of occupancy inspections. Builders who need HERS ratings or energy compliance documentation get it from Phantom Foam as a standard project deliverable.
Volume Scheduling & Builder Pricing
Multi-Home Schedules · Subdivision Coordination · Volume Rates
Builders with recurring project volume — active subdivisions, multi-home custom build schedules, or production builder programs — receive builder-specific pricing and scheduling coordination from Phantom Foam. Multi-home schedules allow for efficient mobilization that reduces per-home cost. We coordinate with your superintendent team on subdivision projects to sequence foam installations against your construction schedule, batch homes by phase when possible, and maintain consistent quality and documentation across all homes in the program. Contact us directly to discuss builder program pricing for your specific project volume and schedule.
HERS Rating & Energy Code Support
Climate Zone 2A · IECC 2021 · Energy Compliance Documentation
Houston new construction homes are required to meet the International Energy Conservation Code Climate Zone 2A requirements. Phantom Foam specifications are designed to meet or exceed these requirements, and we provide documentation of installed R-values, air sealing locations, and foam thicknesses in the format needed by HERS raters and energy compliance professionals. For builders pursuing ENERGY STAR certification, green building programs, or high-performance home labels, Phantom Foam's installation documentation supports the certification package. We work with your energy rater to confirm specification compliance before installation and provide post-installation verification documentation.
Homeowner Education Packets
What Was Installed · Why It Works · Maintenance Notes
Homeowners who understand what spray foam insulation does and why it was specified in their new home are more satisfied buyers who generate referrals for builders who provide them. Phantom Foam provides a homeowner education packet with every new construction project — a plain-language explanation of what was installed, where it was installed, what performance to expect from the assembly, and what (if anything) requires periodic attention. Builders who can hand a buyer a clear explanation of why their home performs better than comparable homes differentiate themselves in a market where most builders install code-minimum fiberglass and say nothing about it.
Product Selection for New Construction
Open Cell vs Closed Cell —
The New Construction Decision
The product selection question on new construction is simpler than it appears once you understand what each product does and where in the building envelope it belongs.
Interior & Attic Applications
Open Cell Spray Foam
R-3.8/inch · Vapor permeable · Best acoustics · Lower material cost
- Attic roofline at 9 to 11 inches — the standard conditioned unvented attic assembly for Houston new construction. Puts ductwork inside the thermal envelope where it performs efficiently instead of in a 150°F attic box.
- Exterior wall full cavity fill at 3.5 inches — complete air seal with no gaps around wiring or framing, R-13 delivered uniformly throughout the cavity
- Interior partition walls for acoustic separation between bedrooms, bathrooms, and living spaces — significantly more effective than fiberglass at reducing airborne sound transmission
- Vaulted and cathedral ceiling assemblies where the full rafter cavity depth is available — eliminates the vent channel required in vented assemblies and simplifies ridge detailing
- Garage ceiling cavities below conditioned bonus rooms and second floors — thermal and acoustic separation from the 120°F garage environment in Houston summer
- Lower material cost per board foot than closed cell — typically 40 to 60 percent less, which allows open cell to be the cost-effective choice in all large-volume interior applications
Exterior & Moisture-Critical Locations
Closed Cell Spray Foam
R-6.5/inch · Class II vapor retarder · Structural · Moisture-resistant
- Exterior wall continuous insulation layer on the sheathing face — creates the vapor retarder at the thermodynamically correct location in Houston's hot-humid climate and breaks the thermal bridge through every stud
- Rim joists and sill plate interfaces — closed cell is the correct product for these high-leakage, moisture-vulnerable locations in every new home regardless of the wall assembly strategy
- Crawl space foundation walls and pier wraps on pier-and-beam construction — creates a conditioned crawl space that protects subfloor framing from Houston's ground moisture
- Below-grade and grade-adjacent wall assemblies — the only appropriate insulation product where bulk water intrusion or sustained vapor drive from the soil is a concern
- Flood zone construction — FEMA Technical Bulletin 2 identifies closed cell spray foam as a flood damage-resistant material for applications below the base flood elevation in Houston's frequent-flood market
- High-performance and custom home exterior walls where maximum R-value in minimum thickness — or vapor retarder performance without a separate membrane — is the specification goal
Most Houston new construction uses both products. The standard high-performance new construction assembly is open cell at the attic roofline and closed cell at the rim joists, with either closed cell continuous insulation or open cell full cavity fill in the exterior walls depending on the performance target and budget. Phantom Foam specs each location correctly for the assembly and the climate — you do not have to choose one product for the whole house.
Active Builder Markets
New Construction Spray Foam
Where Phantom Foam Builds
Phantom Foam serves new construction projects across all of Greater Houston. Below are the most active builder markets where we currently work and the project types most common in each area.
Katy & Fulshear — Fort Bend County
ZIP: 77450, 77494, 77441, 77423
One of the highest-volume new construction markets in Greater Houston. Production homes in master-planned communities and custom homes on acreage west of Fulshear. Open cell attic assemblies on production homes and full hybrid systems on custom builds. Barndominium new construction throughout unincorporated Fort Bend County. Active builder programs for subdivisions in Katy ISD and Lamar CISD footprints.
One of the highest-volume new construction markets in Greater Houston. Production homes in master-planned communities and custom homes on acreage west of Fulshear. Open cell attic assemblies on production homes and full hybrid systems on custom builds. Barndominium new construction throughout unincorporated Fort Bend County. Active builder programs for subdivisions in Katy ISD and Lamar CISD footprints.
The Woodlands & Montgomery County
ZIP: 77380, 77381, 77382, 77354, 77356
The fastest-growing county in Texas for residential construction. Custom homes and production builds throughout The Woodlands village communities and unincorporated Montgomery County. High-performance assemblies are more commonly specified by custom builders in this market than in suburban production markets. Full hybrid systems — closed cell exterior walls, open cell attic — are the most common specification for custom homes in the Woodlands-area market.
The fastest-growing county in Texas for residential construction. Custom homes and production builds throughout The Woodlands village communities and unincorporated Montgomery County. High-performance assemblies are more commonly specified by custom builders in this market than in suburban production markets. Full hybrid systems — closed cell exterior walls, open cell attic — are the most common specification for custom homes in the Woodlands-area market.
Tomball, Cypress & Northwest Houston
ZIP: 77375, 77377, 77429, 77433, 77070
Rapidly developing suburban market with a mix of production and semi-custom construction. Open cell attic assemblies on production homes are the most common application. Barndominium and acreage home new construction in the rural areas north and west of SH-249 toward Waller County. Commercial new construction insulation in the Cypress and Tomball business corridors.
Rapidly developing suburban market with a mix of production and semi-custom construction. Open cell attic assemblies on production homes are the most common application. Barndominium and acreage home new construction in the rural areas north and west of SH-249 toward Waller County. Commercial new construction insulation in the Cypress and Tomball business corridors.
Pearland, Shadow Creek & Brazoria County
ZIP: 77584, 77581, 77578, 77566
Active production builder market with ongoing demand for open cell attic assemblies as an upgrade from blown-in fiberglass on new construction. Flood zone construction throughout Brazoria County drives demand for closed cell in exterior wall and below-grade applications. New custom home construction along the Pearland and Friendswood corridors with full hybrid assembly specifications.
Active production builder market with ongoing demand for open cell attic assemblies as an upgrade from blown-in fiberglass on new construction. Flood zone construction throughout Brazoria County drives demand for closed cell in exterior wall and below-grade applications. New custom home construction along the Pearland and Friendswood corridors with full hybrid assembly specifications.
Houston Heights & Inner Loop Custom
Heights, Montrose, Garden Oaks, Oak Forest, Timbergrove
The inner loop new construction market is dominated by custom and semi-custom builders replacing older housing stock. Full hybrid spray foam systems are the standard specification for serious custom builders in this market — buyers at this price point expect spray foam and ask for it by name. Lot sizes and setbacks make inner loop construction more complex, and builders who coordinate trades effectively win more work in this market.
The inner loop new construction market is dominated by custom and semi-custom builders replacing older housing stock. Full hybrid spray foam systems are the standard specification for serious custom builders in this market — buyers at this price point expect spray foam and ask for it by name. Lot sizes and setbacks make inner loop construction more complex, and builders who coordinate trades effectively win more work in this market.
Sugar Land, Missouri City & Southwest Houston
ZIP: 77478, 77479, 77459, 77489
Established suburban market with active new construction infill and teardown-rebuild projects. Custom builders in Sugar Land and Missouri City increasingly specify full hybrid spray foam systems as a differentiator from production builders who install fiberglass code-minimum. Open cell attic assemblies and closed cell rim joist and crawl space applications on pier-and-beam rebuilds are the most common applications in this market.
Established suburban market with active new construction infill and teardown-rebuild projects. Custom builders in Sugar Land and Missouri City increasingly specify full hybrid spray foam systems as a differentiator from production builders who install fiberglass code-minimum. Open cell attic assemblies and closed cell rim joist and crawl space applications on pier-and-beam rebuilds are the most common applications in this market.
How We Work With Builders
The Phantom Foam
New Construction Process
01
Plan Review & Specification
We review plans, specs, or a description of the home before providing a quote. For new construction, the specification — what product, what thickness, what locations, what assembly strategy — matters as much as the price. We produce a written specification for the builder's records and confirm the assembly meets Climate Zone 2A code requirements. For HERS-rated homes or energy-certified projects, we confirm the specification with your energy rater before installation.
02
Schedule Coordination
We confirm the construction window with your superintendent — framing complete, rough-in cleared, sheathing in place, pre-drywall. We schedule to hit that window without conflicts with adjacent trades. For multi-home builder programs, we batch scheduling across multiple homes to minimize mobilization cost and optimize crew efficiency across the development. Communication with your super throughout — no surprises, no showing up at the wrong phase.
03
Air Seal, Then Foam
On the installation day, we air seal all top plate penetrations, electrical boxes, duct chases, recessed light housings, and plumbing stacks before applying foam. Surfaces adjacent to the application area are masked. Foam is applied by trained crews using professional equipment calibrated to precise chemical temperature and ratio specifications. Installations typically complete in one to two days for standard single-family homes depending on assembly scope.
04
Verify, Document & Deliver
Installed depths are verified before we leave. The site is cleaned completely. Builder packets are delivered: coverage report with installed thicknesses, product data sheets, SDS documents, and photos confirming assembly coverage. Homeowner education packet included. For energy-certified projects, post-installation documentation is formatted for your HERS rater. If the inspection finds any coverage issues, we return to address them before the inspection is complete — that is the workmanship commitment.
Builder Questions
New Construction Spray Foam FAQ for Builders
When in the construction sequence does spray foam get installed?
Spray foam is installed after framing is complete, rough-in inspections are cleared, and sheathing is in place — and before drywall. This is the only window for spray foam in new construction. The specific timing depends on your trade schedule, but typically foam installs 5 to 10 days after framing completion, before drywall is scheduled. We confirm the window is clear before mobilizing — no showing up when electrical or HVAC is still active in the same area. For production builds on tight schedules, we work with your superintendent to schedule within the window without pushing drywall.
How long does a spray foam install take on a new construction home?
A standard single-family home with an open cell attic roofline assembly and closed cell rim joists takes one to two days depending on home size, ceiling height, and assembly scope. Full hybrid systems — closed cell exterior walls plus open cell attic — take two to three days. For production builder programs where multiple homes are being foamed in sequence, we batch scheduling to minimize total mobilization time across the development and provide your superintendent with a predictable schedule for each phase. Interior wall acoustic foam on a full home adds approximately half a day to the schedule.
Does spray foam meet Houston energy code for new construction?
Yes — Phantom Foam specifications for new construction are designed to meet or exceed the IECC Climate Zone 2A requirements that apply to Houston new construction. The standard open cell attic roofline assembly at 9 to 11 inches achieves R-38 to R-44, meeting the Climate Zone 2A minimum of R-38 for unvented attic assemblies. Exterior wall assemblies are specified to meet R-13 minimum at a minimum with full air sealing documentation. For homes pursuing ENERGY STAR or other energy certifications with higher performance targets, we spec to the target and provide the documentation your HERS rater needs to confirm compliance.
What documentation do you provide for builder packets and inspections?
Every new construction project receives a full documentation package: coverage report with installed thicknesses by assembly location, product data sheets for the foam systems installed, SDS documents, project photographs confirming coverage, and thermal barrier confirmation where required. For HERS-rated homes, documentation is formatted to support your energy rater's post-installation verification. For builders with internal quality programs or warranty documentation requirements, we provide whatever specific documentation format your program requires. Documentation is delivered before the project is closed out — it is a standard deliverable, not a request.
Do you offer volume pricing for builders with recurring projects?
Yes. Builders with active subdivisions, recurring custom build schedules, or multi-home programs receive builder-specific pricing and scheduling coordination. Multi-home schedules allow efficient mobilization that reduces per-home cost. For subdivision work, we coordinate with your superintendent team to sequence foam installations against your construction schedule, batch homes by phase when possible, and maintain consistent quality and documentation across all homes in the program. Contact us directly to discuss builder program pricing — the conversation starts with your project volume and schedule, and we build pricing around those specifics.
Can spray foam help a home pass blower door testing?
Yes — and significantly so. Blower door testing measures the air leakage rate of the building envelope, expressed as ACH50 (air changes per hour at 50 pascals of pressure). A spray foam attic assembly with proper air sealing of all top plate penetrations typically reduces a home's ACH50 by 40 to 60 percent compared to the same home with blown-in fiberglass and no air sealing. Homes that need to hit ENERGY STAR or green building program ACH50 targets routinely use spray foam as the air sealing strategy because it is the most reliable way to achieve low ACH50 numbers in production construction. Phantom Foam's air sealing step before foam application is specifically designed to address all the penetration pathways that drive ACH50 readings higher.
What is the difference between spray foam and blown-in fiberglass for new construction?
In Houston new construction, the performance difference between spray foam and blown-in fiberglass is primarily in air sealing, not R-value. You can install R-60 blown-in fiberglass and still have a high ACH50 if the top plates, penetrations, and duct chases are not air sealed. Spray foam air seals the assembly as it insulates — every gap is filled, every penetration is sealed, and the assembly performs as designed throughout the life of the home. Buyers in Houston's new construction market increasingly understand this distinction — they are asking builders specifically about spray foam, and builders who can deliver it and explain it win more sales at the price points where performance matters to buyers.
Builder Partner · Free Spec Review
Let's Build Something
That Actually Performs.
Phantom Foam partners with custom home builders, production builders, and developers across Greater Houston to deliver new construction spray foam that shows up on schedule, installs correctly, and leaves your team with clean documentation for inspections and homeowner closeouts. Send us your plans or call to discuss your build program.
(832) 400-4659