Fast, Reliable Attic Insulation Across Lewisville
Attic insulation in Lewisville typically costs between $1,800 and $4,200 for a standard 1,800-2,400 sq ft pre-code home, depending on whether we’re topping up settled fiberglass or doing a full removal and replacement. Most jobs in the 75067, 75057, and 75077 zip codes are completed in a single day. Topside Attic Insulation crews dispatch from the Dallas-Fort Worth office, so we can usually reach any Lewisville address the same week you call, often same day during spring and fall when the schedule is lighter. For immediate help or a free second opinion on a written estimate, call (218) 261-7714.
Why Topside Attic Insulation Is Lewisville’s Preferred Attic Insulation Company
We do not sweet-talk our way into attics. We measure them. Our crews know what a 155-degree summer attic over a slab-on-grade 1984 ranch near Lake Lewisville actually does to the ceiling below it, because we have chased heat columns across hundreds of them. Since 2016 our blower-door technician and owner Wes Okafor has worked under a simple rule: sealed first, then insulated, always in that order. If there are gaps at the top plates, the can lights, the wire penetrations, no amount of blown fiberglass can fix the problem.
Our Attic Insulation team runs every applicable Lewisville job with a before-and-after blower-door test, and we hand over those numbers in writing. We measure the building envelope, not the marketing warm fuzzies. We air-seal first, then blow, then run the blower door again. The difference in CFM50, a pressurization reading that shows how much conditioned air is leaking, is your proof. Under Haven Standard Clause 1, every Lewisville attic job starts with a flat written price and a written scope, and ends with a documented photo record. Always. No exceptions.
Our Attic Insulation Services in Lewisville
Most Lewisville homes need one of four approaches. We cover them all.
Blown-In Attic Insulation
This is the default fix for the 1978-1995 brick-veneer tract homes that made up most of Lewisville’s suburban growth. We blow Johns Manville, Knauf, or CertainTeed loose-fill fiberglass to R-38 or above, after air sealing every penetration. Blown fiberglass fills those tight, gable-heavy attics off Round Grove Road and Valley Ridge Boulevard better than batts ever can.
Attic Batt Insulation
Batt work is common when we’re working in isolated additions, or when a homeowner needs a specific cavity left clear for rewiring or a future renovation. We install Knauf and Rockwool batts in Lewisville homes when the space demands precision cuts around trusses, braces, and HVAC supports. Batts are rare as a primary roof recommendation on these older plan houses, because they leave seams at the top plates.
Attic Insulation Top-Up
Settled fiberglass in a 1986 Lewisville attic usually reads 3 to 4 inches. A top-up gets it to code without removing what is salvageable. We verify the existing material is dry and pest-free, then blow new fiberglass to R-38. Most top-ups in the Lake Lewisville and Old Town neighborhoods run $1,100 to $2,300 depending on square footage. This service runs a full day.
Attic Insulation Replacement
When the existing insulation is compacted, rodent-soiled, water-damaged, or loaded with dust from years of unfiltered roof venting, we remove it rather than adding on top. Full removal and replacement in Lewisville runs $2,800 to $6,000, and it is the only way to fix a deeply compromised assembly. We include removal, disposal, air sealing, and fresh blown-in material to R-38 in one written price. We also pair this work with Attic Insulation in Lewisville home energy audits when the homeowner wants a complete envelope diagnosis.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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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.
Trusted Brands We Service in Lewisville
We are not tied to a single manufacturer. We buy what works for the climate and the roof assembly, and those are usually certain brands: Johns Manville and CertainTeed for blown fiberglass, Knauf for batts, and Rockwool for fire-rated or sound-rated assemblies. Our trucks carry inventory sized for typical Lewisville jobs, not a generic loading chart. If a 75067 homeowner has an upstairs bedroom turning into a sauna every July afternoon, we can often be on site within 48 hours with the material in hand.
Common Attic Insulation Problems We See in Lewisville Homes
We walk into the same conditions on block after block. Here is what we see.
- Compacted fiberglass on pre-code homes. A 1984 tract home on Mill Street likely started with R-19 batts. Thirty-five years of heat, occasional roof leaks, and settling has thinned that to 3 inches. It is now performing below R-11. We see this in a majority of pre-2001 Lewisville attics.
- Heat columns around recessed lights. Those canned light fixtures someone installed in 1998 are basically tin chimneys through the ceiling plane. A thermal camera walk on a July afternoon shows them glowing. Each can is a hole. Dozens of holes, even with R-38 on the floor, will keep rooms hot.
- HVAC equipment baking in unconditioned attics. Lewisville homes from the 1980s and early 1990s often have the air handler and flex duct running through the attic. At 145 degrees, the system fights itself. The equipment ages faster, and the rooms below never cool evenly. Sealing and insulating the attic takes the load off the mechanicals.
- February 2021 freeze damage. Winter Storm Uri exposed how little pre-code insulation protects against sustained cold. Pipes in exterior walls and attic-adjacent spaces froze, and without a sealed, insulated attic the heat the furnace produced leaked out fast. Houses that have since been sealed and brought to R-38 held up differently.
Pricing for Attic Insulation in Lewisville, TX
We say the numbers out loud, because Haven Standard Clause 1 says a written price comes before any work starts. In Lewisville, a blown-in attic insulation top-up on a 2,000 sq ft home runs $1,100 to $2,300. Full removal and replacement of damaged or pest-soiled insulation runs $2,800 to $6,000. Adding attic baffles and restoring soffit ventilation during the job adds $300 to $800 depending on soffit run length. Insulation and air sealing combined on a 1985 slab-on-grade ranch in the 75077 area typically falls between $2,400 and $4,500.
We do not quote over the phone sight unseen. We come out, measure, and produce a written flat price. That price holds. If you have a written estimate from another contractor, bring it. We will read it with you and tell you what we see. Free second opinion, no obligation to hire us.
We Also Serve Cities Near Lewisville
Our building-envelope work brings us into Lewisville neighborhoods every week, and we also serve the surrounding communities. We work in Flower Mound, Carrollton, Plano, and Richardson on the same schedule, with the same Written Price Before Any Work Starts rule. If you are in a 1990s development near the Lewisville-Flower Mound line, you are on our map.
Serving Lewisville, TX - Our Local Coverage Area
We’re based in the Lewisville 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 - Attic Insulation in Lewisville
Because Texas did not adopt a statewide energy code until 2001, and Lewisville’s dominant building wave ran from 1978 through 1995. Homes from that era were typically built with R-11 to R-19 attic insulation, less than half of today’s R-38 minimum. That is a larger share of the housing stock here than in Flower Mound or Frisco, which built out later under stricter codes. Top-ups and replacements are the standard fix.
Badly. When the attic hits 145 to 155 degrees in July, the air handler and flex duct running through that space absorb heat. The system works harder to deliver cooler air to the rooms, and the upstairs stays hot while the unit runs constantly. Once the attic floor is air sealed and insulated to R-38, the mechanical equipment sits in a much milder space, and the cooling load drops.
Each recessed can light is a hole punched through the ceiling plane. During a summer afternoon, heat from the attic streams straight down through those holes into your living space. Insulation on the attic floor does not cover the cans, so heat finds a path around it. We air seal each can to the ceiling drywall during prep, using a rated cover, before any insulation is blown. Without that step, the attic will keep leaking heat no matter how much fiberglass goes in. Call (218) 261-7714 to see your attic heat map.
Yes, if it is installed with air sealing. Insulation slows heat transfer in both directions. In summer, it keeps radiant attic heat from cooking the rooms below. In winter, it holds the furnace heat inside instead of letting it escape through the ceiling. February 2021 proved how important that is. Sealed-first, then insulated, is the only configuration that protects both extremes.
It depends on what the homeowner wants from the house. If the air handler and ducts are in the attic, which is typical for 1980s Lewisville slab homes, spray foam on the roofline brings those mechanicals into a semi-conditioned space. That usually cuts energy use noticeably and protects the equipment. It costs more than a blown-in floor job, so we show the blower-door and temperature numbers before you decide. A full encapsulation on a 1,900 sq ft home typically runs $8,000 to $16,000 depending on roof geometry.
Written by Wes Okafor, Owner at Topside Attic Insulation, operating under The Haven Standard since 2016.