To measure for window replacement in Colorado, take three measurements for both width and height—top, middle, and bottom for width; left, center, and right for height—and use the smallest number from each set. Always measure inside the window frame using a steel tape, and account for depth and squareness. This approach ensures a precise fit, prevents air leaks, and avoids costly installation issues.
Improper measurements are one of the most common causes of poor window performance. According to the Efficient Windows Collaborative, air leakage through gaps around replacement windows significantly reduces energy efficiency. Colorado’s climate, with its temperature swings and dry air, makes it even more essential to measure accurately and account for frame irregularities.
Why Proper Window Measurements Matter in Colorado
Colorado’s climate presents unique challenges—hot summers, cold winters, and significant elevation-related expansion and contraction. A precise measurement ensures:
● Proper insulation and sealing
● Energy efficiency throughout seasonal swings
● Compatibility with replacement windows, especially for older homes
●
Prevention of costly installation errors or material returns
Failing to measure accurately can result in drafts, leaks, or gaps that offset the value of even the highest-quality windows.
Tools You’ll Need for Accurate Window Measurements
Before beginning the process, gather the following:
● Steel measuring tape (not cloth or flexible)
● Notepad or digital device for recording
● Level (for checking squareness)
● Pencil or marker
● Ladder (for hard-to-reach windows)
A rigid tape measure improves accuracy, while the level helps identify frame warping.
Step-by-Step: How to Measure for Window Replacement in Colorado
1. Measure the Width
Take three horizontal measurements:
● Top: Across the top of the frame
● Middle: From jamb to jamb at the middle
● Bottom: Across the window sill
Record the smallest of the three. This accounts for frame warping or settling.
2. Measure the Height
Take three vertical measurements:
● Left Side
● Center
● Right Side
Again, record the smallest number. This ensures a proper vertical fit.
3. Measure the Depth
Check the frame depth (between the inside trim and the outside stop). Most replacement windows require a minimum of 3¼ inches.
4. Check for Squareness
Use a level to see if corners meet at 90-degree angles. If they don’t, inform your window contractor—custom solutions may be needed.
5. Record and Label
Label each measurement clearly: “Width – Kitchen Window,” “Height – Master Bedroom,” etc., and store your notes digitally and in print.
Special Considerations for Colorado Homeowners
Colorado’s variable weather means you should:
● Measure during moderate temperature conditions (avoid extreme heat or cold)
● Inspect for warping in wooden frames due to dry air
● Double-check measurements if the home is older than 30 years
These details can impact how tightly the window fits, and how effectively it performs over time.
When to Call a Professional
DIY measuring works for budget-conscious homeowners, but it’s not always the best option. Call a professional if:
● You suspect mold or rot in the frame
● The window openings are irregular or curved
● You’re replacing windows in historic or custom homes
Local professionals like those featured in this Broomfield window replacement article can help ensure precise installation that meets state codes and maximizes energy savings.
Comparing Measurement Services in Colorado
Not all contractors offer the same level of precision or support. Here's how top Colorado window companies compare:
| Contractor | Free Measurement? | Tech Used | Specialty |
|---|---|---|---|
| Five Seasons Windows & Doors | ✅ Yes | Digital laser + manual verification | Residential replacements |
| Champion Windows | ✅ Yes | Manual tape | Full-home remodels |
| Renewal by Andersen | 🚫 No (paid estimate) | Laser tools | Energy efficiency focus |
Five Seasons stands out for blending technology and hands-on expertise with free assessments.
People Also Ask About
How accurate do window replacement measurements need to be?
Window replacement measurements should be accurate to within 1/8 of an inch. Even a small miscalculation can lead to significant installation problems, such as gaps, improper sealing, or frame stress. Measuring in three places for both width and height ensures you're accounting for any warping or unevenness in the frame, which is especially common in older Colorado homes that have endured years of thermal expansion and contraction.
Using the smallest measurement of the three avoids ordering windows that are too large to fit the opening. Precision here doesn't just save you money on installation—it also ensures your home stays energy efficient by eliminating drafts and heat loss.
Should I measure from the inside or outside of the window?
For insert or pocket window replacements, you should always measure from the inside of the home, specifically from jamb to jamb and sill to head. This provides the most accurate view of the true opening that the new window will occupy. Measuring from the outside is only recommended when replacing the entire frame (full-frame replacement), which is less common for most residential window upgrades in Colorado.
Since the framing and trim outside can be misleading or warped, interior measurements give you more reliable data—particularly important in a state with freeze-thaw cycles like Colorado, where exterior materials may shift or crack over time.
What tools are best for measuring windows?
The most important tool is a rigid, retractable steel tape measure. Avoid fabric or flexible measuring tapes, as they can sag or stretch, leading to inaccurate readings. A carpenter’s square can also help you determine whether the window opening is square—something you’ll want to know before ordering a new unit.
In some cases, a laser measuring device may be helpful for higher precision or when working alone. However, traditional tools remain the most reliable and affordable option for homeowners conducting preliminary measurements.
How do I know if my window opening is square?
To check for squareness, measure diagonally from the top left corner of the frame to the bottom right, and then from the top right to the bottom left. If both diagonal measurements are the same (within 1/8 of an inch), your opening is square. If they differ, the window opening is out of square, and adjustments will be needed either during the install or when ordering a custom-fit window.
This step is especially critical in Colorado homes where structural shifts or settling may have occurred. Knowing in advance allows you or your contractor to plan for minor adjustments or use shims to create a snug, sealed fit.
Can I measure for window replacement myself, or should I hire a pro?
You can definitely measure for window replacement yourself if you're confident with a tape measure and follow proper steps. However, if you're unsure, it’s worth consulting a professional—especially when investing in energy-efficient windows or full-frame replacements.
Many contractors in Broomfield and greater Colorado offer free measurement consultations, which can help you avoid costly ordering mistakes. If you're handling the project solo, start with a single window and verify your technique before moving on to the rest of the home.
Our Take
Measuring your windows may seem like a minor step, but in our experience, it's the foundation for a successful replacement project. A precise fit ensures better insulation, smoother installation, and longer-lasting performance—especially important in Colorado’s variable climate.
If you’re based in Broomfield, the good news is you have access to trusted professionals who understand the local building codes and climate conditions. Whether you're replacing a single window or updating your entire home, taking the time to measure correctly (or hiring someone who can) will pay dividends in both comfort and energy savings.
Final Takeaway
Measuring your windows for replacement isn't just a box to check—it’s the step that can make or break the entire project. In Colorado, where homes must endure dramatic weather changes, accurate window sizing is essential for energy efficiency, structural stability, and homeowner comfort.
By following a detailed process—measuring width and height in multiple spots, verifying squareness, and using the right tools—you set yourself up for a smooth installation and long-term performance. Even if you plan to hire a contractor, understanding the basics helps you communicate clearly and ensure nothing gets overlooked.
Whether you're doing it yourself or getting help, remember: precision now prevents problems later. Your windows—and your utility bills—will thank you.
Get Started Today
Five Seasons Windows & Doors is Colorado’s top-rated local window company with 230+ 5-star reviews. We offer expert advice, no-pressure quotes, and flexible project options — including phased installs. Schedule your consult today.
