Step-by-step guide shows how to measure RV window glass correctly before ordering a DIY repair kit.
Why Accurate Measurement Matters
RV windows are not standard sizes. Even windows on the same RV can vary slightly. Measuring correctly ensures your DIY repair kit fits properly, seals correctly, and installs without stress on the glass.
Incorrect measurements are the most common cause of problems. Taking a few extra minutes to measure carefully will save time, money, and frustration.
Tools You Will Need
- Metal tape measure (preferred for accuracy)
- Notepad or phone to record measurements
- Straight edge (optional but helpful)
- Good lighting
Pro Measurement Tips
• Use a metal tape measure and measure in at least two locations for width and height.
• Always take the smaller measurement for ordering purposes.
• Record measurements to the nearest 1/16 inch.
• When possible, remove the window for easier measurement access.
Step-by-Step: How to Measure Your RV Window Glass
Step 1 – Measure the Glass, Not the Frame
Always measure the glass itself, not the aluminum window frame. The frame size is different from the glass size and will result in an incorrect kit.
If necessary, remove the window to access the glass for accurate measurement.
normally just opening up a Slider Window is the best option.
Step 2 – Measure the Glass Width
Measure straight across the glass from left edge to right edge.
Record the measurement to the nearest 1/16 inch.
Do not round up or down. Normally you will have either 7/16" or 1/2" thick.
Step 3 – Measure the Glass Height
Measure from the top edge of the glass to the bottom edge.
Measure in more than one location to confirm the size is consistent.
Step 4 – Measure the Glass Thickness
Measure the total thickness of the glass unit. Normally you will have either 7/16" or 1/2" thick window unit.
Many RV windows are dual pane (sealed units), which are thicker than single-pane glass. Thickness is critical for proper fit.
Helpful Tip:
Write your measurements in this format:
Width × Height × Thickness
Example:
32 3/8" × 18 1/4" × 1/2"
Common Measurement Mistakes to Avoid
- Measuring the window frame instead of the glass
- Rounding measurements
- Assuming all RV windows are the same size
- Forgetting to measure glass thickness
- Measuring only once instead of confirming
Always measure twice to be sure.
What Happens After You Measure
1. Choose the correct DIY RV window repair kit in the shop.
2. Enter your measurements during checkout
3. If needed, email us your Year, Make, Model, and measurements before ordering.
4. Your kit is custom prepared.
5. We ship securely anywhere in the USA.
Ready to Order Your DIY RV Window Repair Kit?
If you have your measurements, you’re ready to order your kit.
If you’re unsure about anything, it’s better to ask before ordering so we can help you get it right the first time.
Slider window measurement this window is actually a 7?16" thick window.