Diagnostics
What should I diagnose before scoping a project?
Visible symptoms have specific causes. Before paying for a quote, learn what ice dams, asbestos vermiculite, knob-and-tube wiring, and condensation patterns are actually telling you about the attic.
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.
Attic Mold in Denver
Attic mold in Denver is almost always a moisture problem, not a roof problem. What causes it, how surface mold gets treated, and when you need a licensed specialist instead.
Is My Attic Insulation Failing?
Six telltale signs your attic insulation has failed — and what to do next. Most pre-1990 Denver attics run R-11 against the R-49 code minimum, so failure is closer to baseline than exception.
At-Altitude Performance
How does altitude change the math?
Denver's 5,280-foot elevation and freeze-thaw climate change how insulation, air sealing, and energy savings actually behave. National rules of thumb miss by a meaningful margin in Climate Zone 5B.
Cluster pages publishing soon.
Building Systems
How do attic, crawl space, and ventilation systems interact?
Insulation is one piece of the envelope. Air sealing, ventilation, vapor control, and conditioned-vs-vented decisions all affect each other — and the wrong combination can make a good insulation job underperform.
Cluster pages publishing soon.
Cost & Process
What does the project actually look like start to finish?
Pricing structure, project timeline, contractor selection, and rebate paperwork. Knowing what to expect before the first quote prevents the most common homeowner regrets.
Cluster pages publishing soon.
Sources
What the data says
According to the Department of Energy, “adequate insulation and air sealing can reduce heating and cooling costs by 10% to 20% in typical homes.”
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.”
According to the Building Performance Institute, “BPI-certified energy auditors use blower door testing to measure air infiltration in CFM50, with most pre-1990 homes registering 2-4x the leakage of modern construction.”
Take the next step
Done researching? Get the actual numbers for your home.
Reading guides only gets you so far. The free in-home estimate gives you exact numbers — current R-value, project cost, rebate-adjusted out-of-pocket — based on what the contractor actually sees in your specific attic.
Get a quote
Tell Us About Your Home — Get a Quote in Hours, Not Days
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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.