What we do
What insulation services does Denver Colorado Insulation cover?
Eight core jobs, one principle: tell you what your home actually needs. The right material depends on which decade your home was built and where the heat is actually leaving. Most Denver retrofits use blown-in cellulose; a few don't. Click any service for the full breakdown.
We focus on retrofit insulation upgrades for existing Denver homes. New construction is handled differently and is typically routed through general contractors.
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 5B, which covers the Denver metro area.”
Attic Insulation
Your attic is robbing you. Most pre-1990 Denver attics run R-11 against today's R-49 — that's heat walking out the roof every winter.
Wall Insulation
Pre-1980 Denver walls are usually hollow. Dense-pack cellulose adds R-13 to R-21 without removing drywall — siding patched, paint matched.
Crawl Space
Cold floors, musty smell, high winter bills — all the same problem. Encapsulation fixes comfort, moisture, and radon in one retrofit.
Blown-In Insulation
The workhorse Denver retrofit. Cellulose finishes a 1,500 sq ft attic in a half-day, fills gaps batts can't, and qualifies for the full Xcel rebate stack.
Spray Foam
Costs 2-3x what blown-in costs, and most homes don't need it. Where it earns its price: rim joists, vaulted ceilings, and rooms that refused to warm up.
Energy Audit
Most insulation quotes are missing the math that matters. An audit tells you exactly where the heat is going — and which upgrade pays back fastest.
Air Sealing
Insulation alone does nothing if air leaks aren't sealed first. At Denver's altitude, sealing the attic plane and rim joists is the highest-leverage hour of work most homes can buy.
Insulation Removal
Pre-1990 attic? Old vermiculite, settled cellulose, or rodent damage means new insulation goes on a bad foundation. Clear it first — once.
The math behind why
Why do Denver homeowners insulate?
Three reasons, in order of impact. Every winter you wait, you're heating the attic through the ceiling.
You're losing 18-25% of your heating bill through an under-insulated attic.
That's not marketing math — that's the gap between R-11 (typical pre-1990 Denver attic) and R-49 (current code) translated into Xcel's 2026 winter rates. Five winters of waiting is usually more than the project costs once rebates land.
Cold floors, hot upstairs, that one bedroom that's never right — same root cause.
Drafts and uneven temperatures aren't an HVAC problem; they're an envelope problem. Insulation plus air sealing evens out the entire home in a single afternoon, and you feel the difference the first night.
Xcel rebates pay for 25-40% of the project — if the paperwork gets done right.
The 2026 Xcel Insulation and Air Sealing Rebate, the Whole Home Efficiency Bonus (25% on top when 3+ measures bundle), the $600 Combo Bonus when paired with a heat pump, and the income-tiered Xcel IQ Program all stack. The pro on your job submits the paperwork; you get the rebate as an upfront discount on the invoice. Current amounts and program rules live on Xcel Energy's insulation and air sealing rebate program page.
According to the Department of Energy, “adequate insulation and air sealing can reduce heating and cooling costs by 10% to 20% in typical homes.”
How it works
How does the quote process work?
Three steps. No high-pressure follow-up.
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Tell us about your home in 30 seconds
Name, phone, address, what you're seeing. That's it. The more specific you are about which rooms feel wrong, the better the quote you'll get back.
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A local Denver pro picks up your request
We route to a contractor whose specialty matches your home's era and the work it actually needs — not whoever's first in the queue.
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Free in-home estimate — usually same day, sometimes next
The pro shows up, measures, and gives you exact numbers — not a range. If the math doesn't work for your home, they'll tell you straight.
Get a quote
Tell Us About Your Home — Get a Quote in Hours, Not Days
30 seconds to fill out. Free quote, no high-pressure follow-up.
We've Got It. Here's What Happens Next.
We've got your info. A local pro is reviewing it now. Expect a call within a few hours, or by tomorrow at the latest. While you wait, here's what to look for in the quote you receive: (1) R-value target — current Colorado code is R-49 to R-60 for attics, anything less is under-spec. (2) Air sealing scope — insulation alone does nothing if air leaks aren't sealed first. (3) Rebate handling — Xcel rebate paperwork should be handled for you, not by you. (The federal IRA Section 25C credit expired in 2025 and Colorado HEAR closed for the Front Range — Xcel programs are now the active rebate stack.) (4) Removal scope — pre-1990 homes often need old insulation removed before new install. If a quote skips all four, get another quote.
Where we work
Where do you provide insulation services?
Pick your suburb. Read what your neighborhood actually needs. Park Hill bungalows have one set of problems. Centennial 2005-builds have a different set. Wash Park Squares have a third. Each suburb guide below leads with the era, the typical R-value gap, the era-specific pre-work (asbestos, knob-and-tube, settled batts), and the rebate stack that applies to that ZIP. No generic "Denver metro" copy — the math actually changes by neighborhood.
- Lakewood
- Arvada
- Aurora
- Wheat Ridge
- Centennial
- Englewood
- Littleton
- Westminster
- Thornton
- Park Hill
- Washington Park
- Highland
- Golden
- Broomfield
- Northglenn
Major service areas
Frequently asked
What do Denver homeowners ask about insulation?
According to the Colorado Energy Office, “Colorado's Home Electrification and Appliance Rebate (HEAR) Single-Family Program closed for the Front Range on April 28, 2026, with Xcel Energy programs continuing as the primary residential rebate stack.”
Should I do this if my home was built after 2010?
Probably not yet. Post-2010 Denver homes were built to recent code with R-30 to R-38 attic insulation. If your bills are normal and your comfort is fine, hold the money. The 10-15 year window is when settled batts and unsealed attic-plane penetrations start showing up — that's when post-2010 homes pay back. Until then, hold off. We'll tell you straight when we look at it.
How much does insulation cost in Denver?
Most 1,500-2,500 sq ft Denver attics run $1,500-$5,500 before rebates. Whole-home retrofits run higher. The free in-home estimate gives exact numbers based on your specific home and required pre-work — not a range. After the 2026 Xcel rebate stack (standard rebate plus the Whole Home Efficiency Bonus when measures bundle), net cost typically drops 25-40%; income-qualified households can do substantially better via the Xcel IQ Program.
How long does the work take?
Most attic top-ups finish in a half-day to a day. Whole-home retrofits with wall dense-pack and crawl encapsulation can run two to three days. Pre-1980 homes that need asbestos vermiculite testing or knob-and-tube remediation can add a day before insulation begins. The pro gives you the timeline during the estimate.
Do I qualify for federal or state rebates?
If your home is in Xcel territory and the work brings under-insulated areas up to current code, yes — multiple Xcel programs stack: the 2026 Insulation and Air Sealing Rebate, the Whole Home Efficiency Bonus (25% on top when three or more measures bundle within two years and an Xcel-approved audit is on file), the $600 Combo Bonus when paired with a qualifying heat pump install, and the income-tiered Xcel IQ Program. The federal IRA Section 25C tax credit ended December 31, 2025, and Colorado's HEAR program closed for the Front Range on April 28, 2026 — Xcel programs are now the primary stack. The pro handles the paperwork.
Can I just install insulation myself?
You can. Most Denver homeowners shouldn't. Here's why: blown-in cellulose requires a rented blower machine, two people, and accurate depth verification across the entire attic plane to qualify for Xcel rebates. DIY also forfeits the air-sealing scope (top plates, recessed cans, bath fan housings) that delivers half the comfort improvement. The rebate-rebated math on a pro install is usually better than the DIY math by the time you account for skipped rebates.
Are the quotes really free, with no obligation?
Yes. We don't waste your time. If the math doesn't work for your home, the pro will say so. If you do hire, that's between you and the contractor — including their deposit, scheduling, and warranty terms. We don't take a cut of the install.
What areas of Denver do you serve?
Every Denver-metro suburb on this site has its own page with era-specific guidance. The list: Lakewood, Arvada, Aurora, Wheat Ridge, Centennial, Englewood, Littleton, Westminster, Thornton, Park Hill, Washington Park, Highland, Golden, Broomfield, Northglenn. Plus Denver proper, Highlands Ranch, Boulder, and the rest of the Front Range.