Motorhome RV windows

Differentiating RV Window Sizes

Step-By-Step Instructions for How to Measure RV Windows

Taking the time to properly measure for a new RV window will help ensure a proper fit and easy installation. To make this process as easy as possible, we’ve provided a list of necessary tools and step-by-step instructions below.

Download measuring guide

Tools Needed

Step 1: Remove the old window.

Remove the screws around the perimeter of the window frame
Remove the trim ring
Slide a thin putty knife under the exterior window flange

Step 2: Measure the rough opening.

Window measurement illustration
Parallelogram / trapezoid-shaped window illustration

Step 3: Measure the sidewall thickness.

Sidewall thickness

Step 4: Measure the corner radius.

Corner radius template
Hold the radius template up to a corner in the rough opening for the window

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