Window Replacement in Denver, CO
Failing windows rarely fail all at once. They slip — a draft here, a foggy pane there, a room that never quite warms — until one winter you realize you've been paying to heat the outdoors for years. The Roofing & Siding Company replaces windows for homes across Denver and the Front Range with Pella and ProVia units chosen and fitted for exactly this climate. A window replacement is one of the rare upgrades that pays you back every single month, in comfort and lower bills, while making the house quieter and sharper from the curb at the same time. The one catch is that a window is only ever as good as its installation. Book a free estimate and we'll show you where yours stand.
Everything handled
What's included
- Full-frame and insert replacement, measured to the sixteenth
- Pella and ProVia certified installation
- Energy-efficient dual and triple pane glass packages
- Proper flashing, insulation, and air sealing at every opening
- Haul-away and disposal of your old windows
Straight talk
Worth knowing first
Install quality beats glass specs
The best window leaks if the opening is flashed wrong. Certified installation is why the energy numbers actually show up on your bill.
Full-frame versus insert matters
Inserts are cheaper but keep your old frames. We will tell you honestly which your home needs.
Egress rules apply
Bedroom windows have legal minimum openings. We check code before we order, not after.
Simple process
How it works
Free estimate
We inspect, measure, photograph, and give you a detailed written quote. No pressure, no games.
Materials & schedule
Pick your products and colors with honest guidance, then get real dates you can plan around.
Done right
Certified installation, daily communication, full cleanup, and a walkthrough before we call it finished.
Pay over time
Financing up to $100,000 through Upgrade
Terms from 1 to 15 years, with 0% interest promotional options for qualified applicants. Checking your options takes a minute and does not affect your credit score.
Repair or Replace: Reading Your Windows
Not every window problem means replacement, and the deciding factor is usually where the failure lives — in the glass seal, the frame, or just the hardware:
Fogging between the panes means the sealed glass unit has failed; on older windows, replacement is usually the better value than reglazing.
Rotting or warped frames can't be brought back to airtight — that's a replacement.
Sticking or broken hardware on an otherwise sound, efficient window may just need a repair.
Single-pane or early dual-pane windows are almost always worth replacing outright for the energy gain alone.
The Two Ways to Replace a Window
There are two fundamentally different ways to replace a window, and which one your home needs shapes both the cost and the result. An insert, or pocket, replacement fits a new window into your existing frame and keeps the surrounding trim intact — it's faster, less invasive, and more affordable, and it's the right call when your old frames are still solid. A full-frame replacement takes everything out down to the rough opening, replacing frame, sill, and all, which becomes necessary when there's rot or water damage or you're changing a window's size or style. It costs more, but it's the only way to fix problems hiding in the frame itself. We assess which each opening actually requires rather than defaulting to whichever is easier to sell.
Why Choose The Roofing & Siding Company for Window Replacement
The difference between a window that performs and one that disappoints is mostly in the opening it sits in, and The Roofing & Siding Company has been fitting them precisely across Denver and the Front Range. As a Pella Certified Contractor installing both Pella and ProVia, we flash, insulate, and air-seal every opening to manufacturer spec — which is what makes the energy ratings actually show up on your bill. We're licensed, fully insured, BBB accredited, and a Team Dave Logan member, working from our shop at 6145 Broadway in Denver and serving Boulder, Littleton, Arvada, Golden, and the surrounding Front Range.
What to Expect During Your Window Project
A window project is less disruptive than most home improvements, and knowing the rhythm makes it easier:
Measuring and ordering come first: windows are custom-built to your openings, so there's a lead time between the estimate and installation day.
Each opening is brief: a window comes out and the new one is weathertight the same day, so your home is never left open overnight.
Plan for interior access: we need clear space inside at each window, so pulling blinds, drapes, and nearby furnishings ahead of time helps.
Expect some dust and noise: it's manageable, and we protect floors and furnishings and clean up as we go.
A whole home takes days, not weeks: most projects wrap in a few days once the windows arrive.
Getting the Glass Right for Colorado
Once you've settled the frame and the install method, the glass package is where a window gets genuinely tuned to the climate — and Colorado's climate asks for specific things. The wrong glass leaves comfort and savings on the table; the right glass is what makes the whole investment pay off.
The combination of panes, coatings, and gas fills is what turns a window from a hole in the wall into an insulator. Here's what matters most.
Low-E Coatings and Gas Fills
Low-E coatings reflect heat back where you want it — inside in winter, outside in summer — while blocking the UV that fades your interior. The sealed space between panes is filled with argon or krypton, gases that insulate far better than plain air. Together they drive down the window's U-factor, the number that measures heat loss. For Front Range homes, a quality Low-E and gas-filled package is the single biggest factor in how comfortable and efficient your new windows will actually be.
Double-Pane vs. Triple-Pane
Double-pane with a strong Low-E package is the right choice for most homes and openings. Triple-pane adds a third layer of glass and another insulating gas chamber, which meaningfully improves both insulation and sound control — but it costs more and adds weight. It earns its place on very cold, north-facing rooms, homes near heavy traffic, or whole-home projects chasing maximum efficiency. We'll point out where it's worth it and where double-pane is the smarter spend.
Cost, Payback, and Financing
Window replacement is priced by the number of openings, the frame and glass you choose, and whether each opening needs an insert or a full-frame replacement. We won't invent an energy-savings figure, but the payback comes from three places at once: lower bills, greater comfort, and added home value. You'll get an itemized written estimate before we order anything, and financing is available up to $100,000 through Upgrade, with terms from 1 to 15 years and a pre-approval check that won't affect your credit score.
The Problems a Replacement Expertly Solves
Beyond the energy numbers, replacement fixes the daily annoyances of old windows:
Cold spots and drafts: a properly sealed new window ends the chilly zone that no amount of weatherstripping ever fixed.
Interior condensation: warm-edge spacers and better glass sharply reduce the winter fog and frost on the glass.
Street noise: multi-pane, well-sealed units noticeably quiet a busy road or flight path.
Fussy operation: windows that open, tilt in for easy cleaning, and latch the way they should, every time.
Common Window Situations We Handle
Whole-Home Replacements
Doing every window at once gives you a consistent look, a single coordinated project, and usually the best per-window pricing. It's the most efficient path when most of your windows are the same age and reaching the end together.
One or Two Problem Windows
Sometimes only a couple of windows have failed — a fogged unit, a rotted frame, a picture window that leaks. We'll replace just those, matched as closely as possible to the rest, without pushing you toward a whole-home job you don't need.
New Openings and Resizing
Want a larger window, a new one where there wasn't one, or a different shape? Those are full-frame projects that change the opening itself, and we handle the framing, flashing, and finish so the new window looks original to the house.
Window Replacement
Frequently asked questions
How much can new windows save on energy bills?
Replacing single-pane or failed dual-pane windows typically cuts noticeable heating and cooling loss. The exact number depends on your home, and we will not invent one, but drafty rooms become livable rooms.
How long does window replacement take?
Most whole-home projects finish in one to three days once windows arrive. Each opening is weathertight the same day it is opened.
Pella or ProVia, which should I choose?
Both are excellent. Pella offers huge style range and wood interiors, ProVia is known for heavy-duty vinyl and entry doors. We carry both so the recommendation fits your home, not our inventory.
Finding a good contractor
shouldn't be hard
Living with a damaged roof or failing siding is stressful enough. But often, the 'fix' feels worse than the problem. The last thing you need is a pushy salesman trying to rip you off or a disorganized crew that you're forced to babysit because they won't communicate.
That's why we focus on making this process easy for you. Our professional team will provide the high-quality results you expect while keeping you informed every step of the way. Homeowners rate us 5 stars because we treat you and your property with the care you deserve.
Light in. Drafts out.
Precision-set, sealed, and squared.
Elite means vetted
A James Hardie
Alliance Elite Contractor
Factory-trained, quality-audited, and backed by the #1 name in fiber cement siding. When James Hardie puts their badge on our work, you can put your trust in it.
Explore James Hardie Siding