RV Measuring Guide
How to properly measure your RV for a perfect-fitting storage cover
You've invested in a recreational vehicle and want to ensure it stays in pristine condition for years to come. One of the best ways to protect your RV, especially during storage periods, is with a high-quality RV cover. But to get the maximum protection, you need a cover that fits perfectly—and that starts with accurate measurements.
Why You Need a Properly Fitting RV Cover
Maximum Protection
A properly fitting cover protects your RV from dirt, dust, sap, bird droppings, rain, snow, UV rays, and wind damage. The breathable fabric prevents condensation while still providing water resistance.
Extended Cover Lifespan
A cover that's too small may tear during installation or removal. One that's too large will billow in the wind, causing fabric wear from constant rubbing against your RV's surface. The right fit ensures your cover lasts longer.
Don't Rely on Manufacturer Specifications
While your RV's manual may list dimensions, we strongly recommend taking your own measurements. Actual dimensions can differ from specifications, especially when accounting for accessories like ladders, spare tires, and bumpers that affect cover fit.
Measurement Basics
All measurements should be taken in feet and inches (e.g., 28' 6"). Here's how to measure the three key dimensions:
LENGTH
Measure from the furthest points front to rear. Include bumpers, spare tire, and ladder. Exclude hitches and tongues.
HEIGHT
Measure from the top of the roofline down to the outside frame. Do not stop at the wheel well. Exclude roof accessories, A/C units, vents, and ground clearance.
WIDTH
Stand facing the front of your RV and measure from side to side at the widest point. Exclude mirrors and awnings.
Important Sizing Note
If your length measurement is at the higher end of a cover's length range, there's no need to size up. RV covers include extra fabric to ensure complete coverage and to accommodate roof accessories.
Example: If your RV measures 31', and the available ranges are 28'1"–31' or 31'1"–34', choose the smaller size (28'1"–31'). Only if your RV measures 31'1" or longer should you select the larger size.
Measuring Guide by RV Type
Class A Motorhome
Length
Measure from the furthest points front to rear. For Class A motorhomes, measure to the bunk area or the very front of the bumper, whichever extends furthest. Include bumpers, spare tire, and ladder.
Height
Measure from the top of the roof down to the outside frame. Exclude ground clearance, A/C units, vents, and any roof-mounted accessories.
Class B Van
Length
Measure from the furthest points front to rear. Include bumpers, spare tire, and ladder.
Height
Measure from the top of the roof down to the outside frame. For Class B vans, include bubble height (measured from the very top of the van to the natural roofline). Exclude ground clearance, A/C units, and vents.
Class C Motorhome
Length
Measure from the furthest points front to rear. Include bumpers, spare tire, and ladder. For Class C motorhomes, be sure to measure to the cab-over section or the very front of the bumper, whichever extends furthest.
Height
Measure from the top of the roof down to the outside frame. Exclude ground clearance, A/C units, vents, and any roof-mounted accessories.
Fifth Wheel Trailer
Length
Measure from the rear (including bumper, spare tire, and ladder) to the furthest point on the nose of the trailer coach. Always exclude the hitch and tongue.
Height
Measure from the top of the roofline down to the outside frame. Never stop at the top of the wheel well! Exclude ground clearance, A/C units, vents, and any roof-mounted accessories.
Travel Trailer
Length
Measure from the furthest points front to rear, including bumpers, spare tire, and ladder. Always exclude the hitch and tongue.
Height
Measure from the top of the roofline to the outside frame, remembering not to stop at the top of wheel well. Exclude ground clearance, A/C units, vents, and any roof-mounted accessories.
Truck Camper
Length
Measure from the furthest points of the camper, including bumpers and ladder. For a camper with a rounded nose, measure from the furthest point forward on the nose.
- If total length is under 216", you need Truck Camper 8' to 10'
- If total length is under 238", you need Truck Camper 10' to 12'
Height
Measure from the top of the roofline to the outside frame. Exclude ground clearance, A/C units, vents, and any roof-mounted accessories.
Folding Popup Camper
Length
Measure from the furthest points front to rear, including the spare tire and ladder. Remember to exclude the hitch and tongue of the camper!
Height
Measure from the top of roofline to the outside frame. Exclude ground clearance, A/C units, vents, and any roof-mounted accessories.
Note: If there is an air conditioner, and your height measurement (excluding the A/C unit) is within 4 inches of the higher end of the length range given, we recommend that you choose the next size up.
TearDrop Camper
Length
Measure from the furthest points front to rear, including bumpers, spare tire, and ladder. With these campers, exclude the hitch and tongue.
Height
Measure from the top of the roofline to the outside frame, remembering not to stop at the top of wheel well. Exclude ground clearance, A/C units, vents, and any roof-mounted accessories.
Ready to Order Your RV Cover?
With these instructions, you're now prepared to accurately measure your recreational vehicle and select the perfect cover. Remember that taking precise measurements yourself leads to:
- Choosing the right size the first time
- Extending the lifetime of your cover by reducing wear and tear
- Providing maximum protection from environmental elements
- Preserving your RV's value for years to come
Need Help With Your Measurements?
Our customer service team is ready to assist you with any questions about measuring your RV or selecting the right cover.
Call Us:
1-800-528-4466
Email:
support@unitedcovers.com
Frequently Asked Questions
Why should I measure my RV instead of using manufacturer specifications?
Manufacturer dimensions may not account for external accessories such as ladders, spare tires, or bumpers that affect cover fit. Taking your own measurements ensures you get the most accurate size.
Should I size up if my RV falls on the border of two cover sizes?
No, most covers include extra fabric, so choose the smaller size if your RV falls on the border. For example, if your RV is 31' and the ranges are 28'1"–31' or 31'1"–34', select the 28'1"–31' size.
Can I use a generic tarp instead of an RV cover?
No, a generic tarp does not provide breathability, which can lead to moisture buildup and mold. RV covers are specifically designed with breathable fabric that prevents condensation while still providing water resistance.
Will my cover protect against UV damage?
Yes, a high-quality RV cover will have UV-resistant properties to protect your vehicle from sun damage, which can fade paint and deteriorate rubber seals over time.
How do I secure the cover properly?
Use the included cinch straps and tie-downs to secure the cover at multiple points around your RV. This prevents wind from getting underneath and causing billowing, which can damage both the cover and your RV.
How long do RV covers last?
With proper care, a high-quality RV cover can last 3-5 years. Factors affecting longevity include climate conditions, frequency of use, and how well the cover is maintained.
How should I clean my RV cover?
Use mild soap and water to clean your cover, and allow it to air dry completely before storing. Never use harsh chemicals or put the cover in a washing machine, as this can damage the protective coatings.