Fast, Reliable Spray Foam Insulation Across Cedar Park
Spray foam insulation in Cedar Park typically costs $2,800-$7,500 for attic applications, with most two-story homes in the $4,200-$6,200 range, and our crews can usually start within 48 hours of your call. We’re familiar with the specific construction patterns here - the DR Horton and Centex builds from 1999-2018 that dominate neighborhoods like Twin Creeks and Buttercup Creek - and we know how their duct-in-attic designs fail when original insulation settles. Dispatch and scheduling run from our Austin office, but our crews serve Cedar Park locally and carry the materials to handle closed-cell, open-cell, and rim-joist work without waiting on out-of-town shipments. Call (737) 259-8352 for a free estimate with a written price before any work starts.
Why Topside Attic Insulation Pflugerville Is Cedar Park’s Preferred Spray Foam Insulation Company
We’ve sealed and insulated more than 9,000 homes since 2016, and a significant share of those have been in Cedar Park’s master-planned communities where the same construction defects repeat block after block. Our reviews from Cedar Park customers consistently mention the blower-door numbers we publish - the before-and-after pressurization readings that show exactly how much conditioned air stopped leaking after we finished. Response time to Cedar Park is typically same-day or next-day for estimates, and we don’t schedule work until you’ve got a written scope, written price, and written warranty in hand.
Our crews know the local housing stock cold. We’ve worked on enough homes off Cypress Creek Road and in the Ranch at Brushy Creek to recognize the framing patterns, the common penetration points at top plates, and where those unsealed rim joists hide in two-story slab plans. That familiarity means we test first and quote second - no guesswork based on attic depth alone.
Our Spray Foam Insulation Services in Cedar Park

Open-Cell Spray Foam
Open-cell spray foam in Cedar Park attics runs $2.80-$3.40 per board foot installed, making it the economical choice for roof-deck applications where you need a vapor-permeable barrier and sound dampening. In the hot-humid transition zone that Cedar Park sits in, open-cell works well on roof decks where the assembly needs to dry to the interior, but we won’t recommend it for rim joists or below-grade contact - the permeability that helps in summer becomes a liability when winter cold drives through. We source our open-cell from Icynene and Demilec, and we test every installation with a blower-door reading so you see the air-leakage reduction in CFM50, not just a depth measurement.

Closed-Cell Spray Foam
Closed-cell spray foam is our standard recommendation for Cedar Park’s settled-attic retrofits, at $4.20-$5.10 per board foot. The 2.0+ per-inch R-value and vapor-blocking properties matter here because we’re often applying it directly to unsealed rim joists and top plates in 2000s-era two-story homes where the original builder never completed the air barrier. In Buttercup Creek and Twin Creeks, we’ve found that spraying closed-cell at the rim joist and garage wall junction - then capping the attic hatch - typically drops blower-door readings by 25-40% before we even touch the field insulation. That’s the “sealed first, then insulated” sequence we follow on every job.

Rim Joist Spray Foam
Rim joist spray foam in Cedar Park is usually a $1,800-$3,200 line item, and it’s the single most overlooked upgrade in the city’s 1999-2018 housing stock. Those slab-on-grade two-story plans have a rim joist at the garage-living wall junction that’s almost never sealed at original construction - we find it wide open on roughly 80% of the homes we inspect in Ranch at Brushy Creek and nearby communities. After February 2021, Cedar Park homeowners felt that leak directly: 140-160°F attic air in summer, and sub-freezing winter drafts that the HVAC can’t overcome. Closed-cell spray foam at the rim joist fixes both. We document the before-and-after with photos and a blower-door split - you’ll see exactly what changed.

Garage Ceiling Spray Foam
Garage ceiling spray foam in Cedar Park runs $2,200-$4,500 depending on whether the ceiling is finished or open-joist, and it’s one of the most effective upgrades for homes where bedrooms sit above the garage. In the summer, an uninsulated garage ceiling separates 150°F attic air from a bedroom floor that’s supposed to stay 75°F - the thermal bypass is severe enough that we’ve measured 8-12°F temperature deltas between those bedrooms and interior rooms on the same floor. Spraying the garage ceiling with closed-cell foam breaks that bridge and, in most Cedar Park homes, also seals the rim joist and top plate penetrations that leak into the garage wall cavity.

Spray Foam Roof Deck
Spray foam roof deck applications in Cedar Park cost $3.50-$5.80 per square foot of deck area, and they’re the right solution when the HVAC ducts run through the attic - which is standard in Twin Creeks and Buttercup Creek two-story plans. By moving the thermal boundary to the roof deck instead of the attic floor, you bring the ducts inside conditioned space, eliminating the 15-25% efficiency loss we typically measure when those ducts sit in 150°F attic air. This is not a cheap upgrade, but in Cedar Park’s climate, the payback math is straightforward: every degree the attic runs above outdoor ambient is a degree your ductwork is fighting.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Before
AfterTrusted Brands We Service in Cedar Park
We stock and install spray foam systems from CertainTeed, Icynene, and Demilec - no proprietary lock-in, no single-source dependency. For Cedar Park homeowners, that means we can match the foam type to the application rather than forcing a product that doesn’t fit. Our crews carry closed-cell and open-cell sets on the truck, so most jobs start the same day we finalize the written scope. We also source fiberglass and mineral wool from Owens Corning, Johns Manville, Knauf, and Rockwool for hybrid assemblies where spray foam handles the air sealing and batts or blown-in complete the thermal layer.
Common Spray Foam Insulation Problems We See in Cedar Park Homes

- Settled blown fiberglass testing at effective R-22 or lower. Original R-30 installations in 1999-2018 tract homes have compacted through 15-20 years of 140-160°F attic cycling. Visual depth checks miss this - we use an R-value probe and infrared imaging to measure what’s actually there.
- Unsealed rim joists and top plates in two-story slab plans. The construction detail at the garage-living wall junction was rarely completed to code in Cedar Park’s production builds. We find continuous air leaks that bypass the attic entirely, pulling conditioned air out at the floor line.
- HVAC ducts degraded by attic heat in Twin Creeks and Buttercup Creek plans. Supply ducts running through unconditioned attic space lose 15-25% of their cooling capacity before the air reaches the second-floor registers. Settled attic insulation makes this worse, but the root problem is the duct location - spray foam at the roof deck is the permanent fix.
- Attic hatches and pull-down stairs left unsealed after original construction. A 1/4-inch gap around a pull-down stair is equivalent to a 6-inch square hole in the ceiling. In Cedar Park’s climate, that’s 24/7 conditioned air loss, and it’s invisible from below.
Pricing for Spray Foam Insulation in Cedar Park, TX
Most spray foam insulation jobs in Cedar Park fall between these ranges:
| Application | Typical Range |
|---|---|
| Open-cell attic/roof deck (per board foot) | $2.80 - $3.40 |
| Closed-cell attic/roof deck (per board foot) | $4.20 - $5.10 |
| Rim joist (typical two-story home) | $1,800 - $3,200 |
| Garage ceiling (finished or open joist) | $2,200 - $4,500 |
| Full roof deck (duct-in-attic two-story) | $4,500 - $7,500 |
| Comprehensive attic (air seal + spray + top-off) | $4,200 - $6,200 |
What moves you within these ranges: attic square footage, whether the existing insulation needs removal, accessibility for the spray rig, and whether we’re also air-sealing top plates and can lights before the foam goes in. Every Cedar Park estimate includes a free blower-door test so we can quote from measured leakage, not assumptions. Written price before any work starts - that’s Haven Standard Clause 1. Call (737) 259-8352 to schedule.
We Also Serve Cities Near Cedar Park

Our Spray Foam Insulation in Cedar Park crews also work in Leander, Round Rock, Pflugerville, and Georgetown - same written-price process, same documented photo record, same blower-door verification on applicable jobs. If you’re in one of these communities and your home matches the 1999-2018 production-build profile we see throughout the north Austin metro, the same failure modes and the same fixes apply.
Serving Cedar Park, TX - Our Local Coverage Area
We’re based in the Cedar Park area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Spray Foam Insulation in Cedar Park

You need the test. In the 2006 two-story we opened in Twin Creeks, the blown fiberglass looked full at the joist tops but probed at effective R-19 - the bottom half had compacted to a dense mat with almost no trapped air. Visual depth is meaningless after 15 years of Cedar Park attic cycling. Call (737) 259-8352 and we’ll run the probe and infrared scan as part of your free estimate.
Because your HVAC ducts run through 150°F attic air, and adding more blown fiberglass doesn’t move the thermal boundary to protect them. A blow-in top-off might get you from R-22 to R-38 at the attic floor, but your second-floor supply ducts are still bleeding 15-25% capacity into the attic. Spray foam at the roof deck brings the ducts inside conditioned space - that’s the fix that actually solves the hot-upstairs problem. We can quote both approaches so you see the difference.
In Cedar Park’s 1999-2018 stock, it’s almost always both, but air sealing is the priority. We find unsealed rim joists and top plates that let sub-freezing air straight into the wall cavities - no amount of attic insulation fixes a leak at the floor line. Our process is sealed first, then insulated: we blower-door test to locate the leaks, seal them with closed-cell spray foam at the rim joist and penetrations, then address the thermal layer. The before-and-after blower-door numbers show you exactly how much we closed up.
Closed-cell for rim joists, garage ceilings, and any surface that needs vapor blocking or structural rigidity; open-cell for roof decks where you want vapor permeability and sound dampening at lower cost. In most Cedar Park retrofits, we use closed-cell at the air-leakage points (rim joist, top plates, attic hatch) and either open-cell or a hybrid assembly at the roof deck or field, depending on your budget and whether the ducts stay in the attic. We don’t guess - we test, then specify.
Yes, measurably. We’ve tracked 6-10°F reductions in bedroom floor temperature above sprayed garage ceilings in Cedar Park homes, and the blower-door improvement from sealing the rim joist and top plate at that junction is typically 15-25% of total home leakage. The garage ceiling is usually the worst thermal bridge in a two-story plan - it’s also one of the most cost-effective spray foam applications we do. Call (737) 259-8352 for an exact quote; estimates are free.
Written by Wes Okafor, Owner at Envelope Insulation Co., serving Cedar Park since 2016 under The Haven Standard.