"When it's time for a new roof, you want it done right the first time — premium materials, proper ventilation, and an owner-operator who stands behind every shingle. That's what Thomsen Roofing has delivered to Boulder homeowners for four decades."
A roof replacement is one of the biggest investments you'll make in your home, and it's one of the few that protects everything underneath it. When your roof has reached the end of its life — whether from age, accumulated storm damage, persistent leaks, or failing shingles — a full replacement done correctly will protect your home for the next 30 years or more. Done poorly, it can cost you far more in repairs, energy loss, and headaches down the road.
At Thomsen Roofing & Restoration Services, a roof replacement isn't a slap-on-the-shingles job. Every replacement starts with a complete evaluation of your home's existing structure, roof decking, attic ventilation, and flashing details. We tear off the old roof down to the deck, inspect and repair the decking where needed, and install a premium, manufacturer-backed roofing system the right way — with proper underlayment, new flashings, new pipe boots, and a properly balanced ventilation system.
Owner Scot Thomsen has been replacing roofs across Boulder, Longmont, Erie, Louisville, and the Front Range since 1985. He's hands-on from the first inspection through the final walkthrough — so the person who quotes your roof is the same person who stands behind it. That's why more than 90% of our business comes from referrals.
Every Thomsen roof replacement is built around the details that determine how long a roof actually lasts — not just the shingles you can see from the street.
We strip the old roof down to the deck rather than layering over it — so we can inspect the decking, catch hidden damage, and build your new roof on a sound foundation.
As a GAF-certified contractor, we install top-tier, manufacturer-backed shingle systems — architectural and designer options built to handle Colorado's sun, snow, wind, and hail.
Every replacement includes a full attic ventilation evaluation. Proper venting keeps your manufacturer warranty valid and is often the difference between a 10-year and a 30-year roof.
We replace all flashings, underlayment, and pipe boots — never reuse them. These are the components that fail first and cause the leaks most roofers' shortcuts leave behind.
We recycle all roofing debris and leave your property spotless, including a magnetic nail sweep — so the only thing left behind is a beautiful new roof.
Every new roof is backed by our workmanship warranty plus the manufacturer warranty on the materials — both spelled out clearly in writing before we start.
Not sure whether you need a repair or a full replacement? Some warning signs are obvious, others are easy to miss until they become expensive. If you're seeing several of these, it's worth a free inspection — and we'll always tell you honestly whether a repair will buy you more good years or whether a replacement is the smarter investment.
When in doubt, get it looked at. A free Thomsen inspection costs you nothing and gives you a clear, honest answer.
Here's what most roofers won't tell you: most manufacturers will not honor their shingle warranties if the attic isn't properly vented. A brand-new roof installed over a poorly ventilated attic can trap heat and moisture, cook your shingles from below, drive up energy bills, and void the very warranty you paid for.
That's why every Thomsen roof replacement includes a full attic ventilation assessment as standard. We evaluate your intake and exhaust, recommend the right balanced system — ridge vents, intake vents, and proper airflow — and install it as part of the job. It's the kind of detail that doesn't show up in a low-bid quote, but it's exactly what makes a roof last.
Clear communication and no surprises — from your first call to the final walkthrough.
We assess your roof, decking, ventilation, and flashing in person — no charge.
An itemized written estimate covering materials, scope, timeline, and warranty.
We strip to the deck, inspect, and repair any damaged decking before installing.
New underlayment, flashings, pipe boots, ventilation, and your new roofing system.
Full debris recycling, nail sweep, final walkthrough, and your warranty in writing.
Most residential roof replacements in the Boulder area take one to a few days, depending on the size and complexity of the roof, the material, and the weather. We give you a realistic timeline in your written proposal and communicate clearly throughout. Larger or steeper roofs, or jobs that turn up decking repairs, may run a bit longer.
We don't recommend it, and we don't do it. Layering a new roof over an old one hides decking damage, adds weight, traps heat, shortens the life of the new shingles, and can void manufacturer warranties. A complete tear-off lets us inspect and repair the deck and build your new roof on a sound, properly prepared foundation — the way it should be done.
It depends on the size, slope, decking condition, material choice, and ventilation needs — which is why we don't quote roofs over the phone. Every Thomsen estimate is free, in person, and includes a thorough inspection. You'll get a clear, itemized written estimate so you know exactly what you're paying for. Be cautious of any contractor who quotes a price without actually seeing your roof.
As a GAF-certified contractor, we install premium architectural and designer asphalt shingle systems backed by manufacturer warranties. We also offer standing-seam metal roofing as a premium, long-lasting option that stands up beautifully to Colorado weather. We'll walk you through the options and help you choose what fits your home and budget.
Yes. Every new Thomsen roof includes our workmanship warranty plus the manufacturer warranty on the materials we install. Because we always replace flashings and pipe boots and always handle ventilation properly, your manufacturer warranty stays valid — which is the coverage that matters most over the long haul. We provide all of it in writing.
Absolutely. If your roof needs replacing due to hail or storm damage, we document the damage thoroughly and work directly with your insurance company through the claim. See our Hail & Insurance Restoration page for details on how we guide you through the process from inspection to completed installation.
Free estimates • Licensed & Insured • GAF Certified • Workmanship Warranty • Serving Boulder Since 1985
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