Who we work with
Who is New Construction Insulation for?
New construction insulation is installed into open wall, attic, and floor framing before drywall goes up — a fundamentally different install than retrofit dense-pack or blown-in work, which has to work around finished walls and ceilings. Materials are typically batts, blown-in, or spray foam installed to the framing plan, inspected before drywall closes the cavities.
This is a distinct scope from the retrofit services elsewhere on this site, which address existing homes with finished walls and ceilings. If you're a homeowner with an existing house, see the attic, wall, or crawl space insulation pages instead — this page is for builders and general contractors.
Scheduling & crew capacity
How does scheduling work for new construction insulation?
General contractors and builders working on new single-family or multi-unit construction in Longmont, Lafayette, Louisville, or Niwot who need an insulation subcontractor that works on the framing crew's schedule, not a homeowner-retrofit timeline.
Also relevant for additions — Xcel's rebate exclusion list names additions alongside new construction, so an addition scope should be quoted and scheduled the same way as new construction, not as a retrofit.
Per-square-foot pricing
How is new construction insulation priced?
New construction insulation is priced per square foot of conditioned space rather than as a flat retrofit project quote — ask for a per-square-foot bid broken out by assembly (attic, wall, floor) so it's comparable across bids and easy to apply to different unit plans on a multi-unit project.
Because Xcel and Efficiency Works both exclude new construction from their retrofit rebate programs, pricing on this page is not rebate-adjusted the way the homeowner retrofit pages on this site are — the number you're quoted is the number, not a before-and-after-rebate range.
Code compliance
What code does new construction insulation need to meet in Longmont?
The City of Longmont adopted the 2024 International Codes, effective July 1, 2026. Confirm the specific energy-code edition and any local amendments in effect for your permit's review date with the city's building department — code adoption dates and amendments can change project to project depending on when a permit is pulled.
The model 2021 IECC's Climate Zone 5 ceiling-insulation table prescribes R-49 minimum for attics as a general reference point — cross-check this against whatever specific edition governs your permit rather than assuming they're identical.
According to the International Energy Conservation Code, “the 2021 IECC (R402.1.2) sets attic insulation minimums at R-49 to R-60 for Climate Zone 5.”
Process
How does the new construction insulation process work?
Plan review
Crew reviews framing plans and the project schedule to scope material quantities and crew timing around the framing and rough-in trades.
Per-square-foot bid
A written bid broken out by assembly (attic, wall, floor) and priced per square foot of conditioned space, comparable across unit plans on multi-unit projects.
Pre-drywall scheduling
Insulation is scheduled after rough electrical, plumbing, and HVAC inspections pass, and before the drywall trade starts — coordinated directly with your superintendent or project manager.
Installation to plan
Batts, blown-in, or spray foam installed to the framing plan and target R-values, with attention to consistent coverage at rim joists, band joists, and other assemblies inspectors commonly flag.
Pre-drywall inspection support
Crew is available for the local building inspector's pre-drywall insulation inspection, correcting any flagged items before drywall closes the cavities.
Documentation
Photos and coverage documentation provided for your project file, useful for future energy-code compliance records or buyer disclosures.
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Tell Us About Your Home
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We've Got It. Here's What Happens Next.
We've got your info and are routing it to a local pro. When they call, here's what to look for in the quote you receive: (1) R-value target — the model energy code for Climate Zone 5 calls for R-49 to R-60 attic insulation; ask what your contractor is quoting to. (2) Air sealing scope — insulation alone does nothing if air leaks aren't sealed first, and Xcel requires a blower door test to rebate it. (3) Rebate handling — ask which programs your specific address qualifies for. Xcel and Efficiency Works are separate programs with separate paperwork, and not every address qualifies for both. (The federal IRA Section 25C tax credit ended December 31, 2025 — no federal insulation credit applies to 2026 work. Xcel Energy's insulation and air-sealing rebate remains active for its gas and electric customers. Longmont Power & Communications electric customers may separately qualify for an Efficiency Works rebate — check your bill to see which utility serves your address. Boulder County EnergySmart pays a third, income-qualified-only rebate as of January 1, 2026.) (4) Removal scope — older homes often need old insulation removed before new install. If a quote skips all four, get another quote.
Frequently asked
What do Longmont builders and contractors ask about new construction insulation?
Does this project qualify for the Xcel or Efficiency Works rebate?
No. Xcel Energy's insulation and air-sealing rebate explicitly excludes new construction, additions, garages, sheds, and mobile homes. Efficiency Works requires the home be at least 1 year old, which also excludes new construction. Price new-construction insulation as a straight per-square-foot cost, not a rebate-adjusted retrofit figure.
What code edition do I need to meet?
The City of Longmont adopted the 2024 International Codes, effective July 1, 2026. Confirm the specific energy-code edition and any local amendments in effect for your permit's review date directly with the city's building department — that's the authoritative answer for your specific project, not a general figure quoted on this page.
Can you handle a multi-unit or production-schedule project?
That's a crew-capacity and scheduling conversation specific to your project's unit count and timeline — bring your schedule to the initial scope call and we'll be straight about what fits.
Do you also handle additions?
Yes — Xcel's exclusion list groups additions with new construction, so additions are quoted and scheduled the same way: per square foot, on your project's trade sequence, not as a retrofit.
How do you price compared to a retrofit homeowner job?
Per square foot of conditioned space, broken out by assembly (attic, wall, floor), rather than a single project quote. That format is standard for comparing new-construction bids and applying pricing consistently across repeat floor plans.