Measure With
Confidence.
Or Let Us Handle It.
Professional measuring is part of the Roadrunner experience. Our team evaluates more than width and height — we look at mounting depth, trim, obstructions, operating clearance and the product you're selecting to help ensure the right fit.
Ordering one of our basic DIY-friendly products online? Use the guide below to help you get started.
Schedule a Professional Consultation →For custom projects, professional measuring is always recommended.
1. Before You Pick Up the Tape Measure
A few simple tips will help ensure accurate measurements.
Use an Accurate Measuring Tool
Use a quality steel tape measure or a reliable laser measuring device. Measurements should be precise and recorded carefully.
Width × Height
Always record measurements as width first, then height.
Measure Every Window
Even windows that appear identical can have slightly different dimensions.
Don't Make Deductions
Record the actual opening measurements. Do not automatically subtract from your measurements. Product-specific manufacturing allowances can vary.
2. Inside Mount or Outside Mount?
The mount you choose can change the look of your window and the amount of light control.
The treatment installs inside the window opening.
Why choose it:- Clean, built-in appearance
- Keeps trim visible
- Treatment sits closer to the glass
- Requires adequate mounting depth
The treatment installs over the opening, typically on the trim or wall.
Why choose it:- Useful when inside mounting depth is limited
- Can provide greater coverage
- Can help reduce light around the edges
- Can visually make a window appear larger
Not sure which mount is right for your window?
Don't guess. We'll help you choose the best option during your consultation.
Schedule a Consultation →3. Measuring Basic Blinds & Shades
These general guidelines apply to many of the blinds and shades available in our online store.
WIDTH
Measure the inside width at the top, middle and bottom.
Record all three measurements.
HEIGHT
Measure the inside height at the left, center and right.
Record all three measurements.
Do not make your own deductions. Follow the ordering instructions for the specific product you're purchasing.
Measure the area you want the finished treatment to cover.
WIDTH
Determine the desired width, including how much extra coverage
you want on each side.
HEIGHT
Measure from the intended mounting location at the top to where
you want the treatment to end.
Every product is a little different.
Required mounting depth, clearances and manufacturing deductions can vary by product and operating system. Follow the ordering instructions provided with the specific RWF online product you're purchasing.
4. There's More to Measuring Than Width × Height
When Roadrunner measures, we look at the details that can make or break the final fit.
That's why a professional measure can prevent an expensive mistake before your product is ever ordered.
5. Some Windows Shouldn't Be DIY
For the best results, let Roadrunner measure these.
Shutters
Frame selection, depth, trim, sill conditions and obstructions can all affect fit.
Motorized Treatments
Motor clearance, power source, battery access and installation conditions need to be considered.
Exterior Screens
Exterior mounting surfaces and installation conditions require professional evaluation.
Arches & Specialty Shapes
Multiple dimensions and the exact shape of the opening matter.
Oversized Windows
Small measurement differences become more significant across large openings.
Drapery
Rod width, projection and finished length all affect the final design.
Let our team handle it.
We'll make sure everything is measured correctly so your window treatments look beautiful and perform as expected.
Schedule My Measure →6. Measurement Worksheet
Use this worksheet to keep track of your measurements.
| Room | Window # | Width | Height | Mount (Inside / Outside) |
Product | Notes |
|---|---|---|---|---|---|---|
Print Your Worksheet
Print a copy to use while measuring your windows.
Why Measure Twice When We Can Measure It Right?
From product selection and measuring to professional installation, Roadrunner can take care of the details from start to finish.
You choose the look. We'll help make sure it fits.
Schedule a Consultation →