What we do
What insulation services does Denver Colorado Insulation cover?
Eighteen 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 sets a minimum ceiling insulation R-value of R-60 in Climate Zone 5 under Table R402.1.3, and Section R402.2.1 allows R-49 to satisfy that requirement only where the full height of uncompressed R-49 insulation extends over the wall top plate at the eaves.
Attic Insulation
Your attic is robbing you. Most pre-1990 Denver attics run R-11 to R-19 against today's R-60 — 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 Insulation
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 Insulation
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 underperforms badly 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.
Blower Door Testing
Every insulation quote is a guess until someone measures. A blower door puts a number on where your house is actually leaking, before you pay to fix the wrong thing.
Rim Joist Insulation
The band where your floor framing meets the foundation leaks more air per square foot than anywhere else in the house. Smallest area, biggest return.
Cathedral Ceiling Insulation
Vaulted ceilings have no attic above them — no room for extra depth and no second chance. Vented or unvented gets settled before anyone opens the drywall.
Dense-Pack Cellulose Insulation
The wall cavity fix that never touches your drywall. Dense-packed from outside through siding holes, adding R-13 to R-21 where there is currently nothing but air.
Radiant Barrier Installation
Reflects summer heat before it loads your attic. Denver's cooling season is short, so this earns its place after insulation and air sealing — not before.
Duct Sealing and Insulation
Air you already paid to heat, leaking into the attic before it reaches the room. Sealing the runs costs less than adding capacity to cover the loss.
Knob-and-Tube Safe Insulation
Pre-1940 wiring sheds its heat into open air. Bury it in insulation and that heat has nowhere to go. Assess first, insulate second, and never let anyone reverse that order.
Rodent-Damaged Insulation Replacement
Contaminated insulation does not recover. It comes out, the entry points get closed, and new material goes into a clean cavity — in that order or not at all.
Vermiculite Insulation Abatement
Zonolite is treated as asbestos-containing until an accredited lab says otherwise. Colorado requires CDPHE-certified abatement. Do not disturb it yourself.
Hybrid Insulation
A thin layer of closed-cell foam against the sheathing, batts filling the rest. The foam does the air and vapor work; the batts buy the R-value at a lower price.
The math behind why
Why do Denver homeowners insulate?
Two reasons, in order of impact. Every winter you wait, you're heating the attic through the ceiling.
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 rebate money is real — the paperwork decides whether you ever see it.
The 2026 Xcel Insulation and Air Sealing Rebate, the Whole Home Efficiency Bonus (25% of the rebate already paid when 3+ measures bundle), the $600 Combo Bonus when paired with a qualifying heat pump installed and invoiced by December 31, 2026, and the income-qualified Xcel IQ Program all stack. The pro on your job submits the paperwork; Xcel issues the rebate as a check after the application is approved. Current amounts and program rules live on Xcel Energy's insulation and air sealing rebate program page.
According to ENERGY STAR's Seal and Insulate program, “EPA estimates that homeowners can save an average of 15% on heating and cooling costs (or an average of 11% on total energy costs) by air sealing their homes and adding insulation in attics, floors over crawl spaces and basements.”
How it works
How does the quote process work?
Three steps.
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Tell us about your home
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, scheduled directly with the pro
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
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 2021 IECC sets a ceiling minimum of R-60 in Climate Zone 5 (Table R402.1.3); R-49 qualifies only where uncompressed insulation extends full-height over the top plate at the eaves. (2) Air sealing scope — insulation and air sealing work together; sealing the leaks first is what lets the insulation do its job. If a quote skips both, get another quote. The federal IRA Section 25C tax credit ended December 31, 2025, and Colorado's HEAR single-family program is now closed for both Region 1 (the Front Range) and Region 2. Xcel Energy programs remain the primary rebate stack for Denver-area insulation projects in 2026.
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
Background reading
What should I read before getting a quote?
If you're researching before scoping, the Resources hub covers the diagnostic questions homeowners ask before paying for a quote — Denver-specific, plain language, no marketing fog.
Ice Dams in Denver
Ice dams aren't a roof problem — they're an attic-heat-loss problem. What causes them, why heat cables don't fix them, and what does.
Knob-and-Tube + Insulation
Pre-1950 Denver homes are full of knob-and-tube wiring — and code prohibits insulating over it. What it looks like, why it matters, and the right sequence to handle it.
Vermiculite Insulation
Most attic vermiculite installed before 1990 contains asbestos. How to identify it, why you can't DIY-remove it, and what testing and abatement actually cost in Denver.
Frequently asked
What do Denver homeowners ask about insulation?
According to the Colorado Energy Office, “the HEAR single-family program is now closed for both Region 1 (the Front Range) and Region 2 (All Other Counties).”
Should I do this if my home was built after 2010?
It's an ROI question, not a code emergency — but don't assume you're covered. Post-2010 Denver homes typically went up with R-30 to R-38 in the attic, real insulation and still short of the R-60 ceiling minimum in current code. If your bills are normal and your comfort is fine, the payback is slower than on a pre-1990 attic, so there's no rush. The 10-15 year window is when settled batts and unsealed attic-plane penetrations start showing up — that's when these homes pay back fastest. We'll tell you straight when we look at it.
How much does insulation cost in Denver?
No primary source publishes a Denver-specific installed cost per square foot for insulation, so this site doesn't print a figure here. The free in-home estimate gives exact numbers based on your specific home and required pre-work. The 2026 Xcel rebate stack (standard rebate plus the Whole Home Efficiency Bonus when measures bundle) brings the net cost down; how far depends on which measures your home needs and the per-measure caps that apply.
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% of the rebate already paid 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 installed and invoiced by December 31, 2026, and the income-qualified Xcel IQ Program. The federal IRA Section 25C tax credit ended December 31, 2025, and Colorado's HEAR single-family program is closed in both of the state's HEAR regions — Xcel programs are now the primary stack. Xcel pays only on work completed by a participating contractor, so confirm that status with whoever quotes your job.
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). The rebate 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.