Last Updated on July 27, 2026 by Daniel Globe
A travel trailer cover can reduce exposure to sun, rain, snow, dirt, tree debris, and bird droppings while the trailer is stored. The cover must match the trailer and be secured correctly. A loose cover can billow and rub the finish, while an undersized cover can strain seams or leave part of the trailer exposed.
Quick Answer
Measure the trailer body at its longest point, record the width and height, and note every fixed protrusion. Do not assume the advertised RV length is the cover size. Because brands treat hitches, ladders, spare tires, and rooftop equipment differently, compare your measurements with the exact cover maker’s sizing diagram before ordering.
Key Takeaways
- Measure the trailer yourself instead of relying only on the model name or published overall length.
- Check the cover maker’s rules before deciding whether to include the hitch, ladder, spare tire, air conditioner, vents, or antennas.
- Measure with slide-outs, awnings, steps, and stabilizers in their normal stored positions unless the cover instructions specifically say otherwise.
- Choose a breathable, water-resistant cover with vents, reinforced corners, and a secure strap system suited to your storage climate.
- Clean and dry the trailer, pad sharp edges, and tighten straps only as directed to reduce abrasion and tearing.
At a Glance
| Time Required | About 20 to 30 minutes |
| Difficulty | Easy with a helper; moderate if working alone |
| Tools Needed | 25-foot or longer tape measure, stable step ladder, notepad or phone, pencil, and ideally a helper |
| Cost | $0 if you already own the tools |
Tools and Materials Needed for Measuring
Measuring Tools and Materials
Use a reliable tape measure that is long enough to span the trailer without joining several short measurements. A 25-foot tape works for many trailers, but a longer tape is more convenient for larger units. A rigid tape is useful for straight dimensions, while a flexible tape can help around rounded front caps.
- A 25-foot or longer tape measure
- A stable step ladder with an adequate load rating
- A notepad, phone, or tablet for recording dimensions
- A pencil, removable painter’s tape, or washable chalk for marking reference points
- A helper to hold the tape and confirm the reading
Recording Measurements
Record every dimension in both feet and inches, and keep the exact inch measurement for comparison with a sizing chart. Note whether a measurement includes a rear ladder, spare tire, bumper, front storage box, roof accessory, or other projection. Photos of the tape at each endpoint can help you check the numbers later.
Additional Tips for Accurate Measurements
Park on a firm, level surface. Retract slide-outs, awnings, entry steps, and stabilizers into their normal storage positions unless the cover manufacturer gives different instructions. Close roof vents and remove loose items that will not stay on the trailer during storage.
Warning: Use a ladder only on a stable, level surface. Keep your body centered, maintain three points of contact while climbing, and never stand on the top step or cap. Do not climb onto the RV roof merely to measure it. OSHA’s portable-ladder requirements provide a useful safety reference.
How to Measure a Travel Trailer for a Cover
Before measuring, open the sizing page for the exact cover brand or product line you plan to buy. The instructions are not universal. For example, Covercraft’s ADCO guide says to include bumpers, a spare tire, and a ladder in the length but exclude the hitch. Classic Accessories uses its own body-length and height rules and notes that its covers already allow for certain accessories.
Step 1: Identify the Trailer and Cover Type
Confirm that you are shopping for a travel trailer cover rather than a fifth-wheel, toy hauler, teardrop, folding trailer, truck camper, or motorhome cover. Each body shape uses a different pattern. Save the product’s measurement diagram and size chart before taking measurements.
Step 2: Put the Trailer in Storage Position
Retract the slide-outs and awning, fold the steps, close vents, and secure antennas or accessories according to their manuals. Measure the trailer as it will sit under the cover. A cover should not be stretched over an extended slide or awning unless its manufacturer specifically approves that setup.
Step 3: Measure the Length
Measure in a straight horizontal line from the farthest fixed point at the front of the trailer body to the farthest fixed point at the rear. Do not follow the curve of the roof or sidewall with the tape. Record the body length and list protrusions separately.
- Hitch and tongue: Most travel trailer storage covers do not cover the A-frame hitch or tongue, but verify the product instructions.
- Rear bumper: Include it when it is part of the cover maker’s stated length method.
- Spare tire and ladder: Include them only when the sizing guide tells you to measure to the farthest point. Some brands build extra room into the pattern.
- Front storage box or permanently mounted equipment: Record how far it projects and confirm whether the cover is designed to enclose it.
Step 4: Measure the Height
Height is the most brand-dependent dimension. Some manufacturers ask for roofline-to-ground height. Others ask for sidewall height from the bottom of the body or mid-wheel area to the roofline, excluding ground clearance. Do not automatically add the air conditioner, vents, solar panels, or antennas because many covers already include rooftop allowance. Follow the exact diagram for the cover you are considering.
Step 5: Measure the Width
Measure straight across the widest part of the stored trailer body, usually from sidewall to sidewall. Keep slide-outs and awnings retracted. Record fixed side projections, such as permanently mounted equipment, if they extend beyond the normal body width. Do not assume that all universal covers use the same width.
Step 6: Record Protrusions and Sharp Edges
Make a separate list of the rear ladder, spare tire, rain gutters, roof vents, air conditioner, antennas, solar equipment, awning hardware, steps, mirrors, and sharp corners. This list helps with both sizing and installation because exposed edges may need padding.
Step 7: Compare the Measurements With the Size Chart
Match your dimensions to the manufacturer’s stated size range, not merely to the trailer’s model number. If the measured length exceeds a listed range, even slightly, do not force the smaller cover. Use the next approved size or contact the manufacturer. Also check the cover’s listed width and height so a larger length does not create excessive loose fabric elsewhere.
Step 8: Measure Again
Repeat the length, height, and width measurements. If two readings differ, check the endpoints and take a third reading. A helper should read the tape from the opposite end so both people agree on the number.
Pro Tip: Keep a note labeled “cover measurements” with the date, trailer configuration, exact product line, and whether each accessory was included. This prevents confusion when comparing several brands with different sizing rules.
Common Mistakes to Avoid When Measuring
| Mistake | Why It Causes Problems | Better Approach |
|---|---|---|
| Using the advertised RV length | The published length may include the tongue and hitch or use a model-name number that is not an exterior dimension. | Measure the trailer yourself using the cover maker’s endpoints. |
| Applying one brand’s rules to another brand | Manufacturers differ on ladders, spare tires, rooftop equipment, ground clearance, and hitch length. | Use the diagram for the exact product line. |
| Measuring with slides or awnings extended | The result may be wider than the cover’s stored-trailer pattern and can produce a poor fit. | Retract them unless the cover is expressly designed for extended storage. |
| Adding every rooftop accessory to the height | Some patterns already include allowance for air conditioners, vents, and antennas. | Measure height exactly as the manufacturer defines it. |
| Ignoring a rear ladder or spare tire | When the product requires farthest-point length, the cover may be too short. | Record protrusions and check whether they belong in the stated length. |
| Choosing a much larger cover “to be safe” | Excess fabric can flap, rub the finish, and place extra stress on seams and straps. | Choose the smallest approved size range that fully contains all required measurements. |
Wheelbase is not normally used to size a travel trailer cover. Ground clearance may matter only as part of a manufacturer’s height definition. Recording extra dimensions is useful, but the final choice should be based on the sizing chart rather than a homemade formula.
Choosing the Right Type of Cover for Your Travel Trailer
Fit is only one part of the decision. The fabric, ventilation, seams, straps, access panels, and climate rating also affect how well the cover performs. Many fabric RV covers are water-resistant or water-repellent rather than fully waterproof. Classic Accessories, for example, states that its RV covers are not waterproof.
Match the Cover to the Storage Climate
- Strong sun and heat: Look for high UV resistance, a light-colored or reflective roof panel, and fabric rated for intense sun.
- Rain and humidity: Choose water-resistant fabric with built-in vents so trapped moisture and condensation can escape.
- Snow and freezing weather: Use a cover approved for winter conditions and follow the RV and cover manufacturers’ guidance for snow accumulation.
- Wind: Choose front and rear cinching, underbody straps, vents, reinforced corners, and a size that limits loose fabric. Inspect the cover after strong wind.
- Indoor storage: A lighter dust cover may be enough if the trailer is fully sheltered and dry.
Breathability matters because moisture supports mold growth. The U.S. Environmental Protection Agency explains that moisture control is the key to mold control. A cover can reduce direct exposure, but it cannot repair roof leaks or make a damp trailer dry. Fix leaks and dry the RV before covering it.
Custom-Fit Covers: A Precise Fit for Optimal Protection
A true custom or pattern-specific cover is made from detailed measurements or a known RV pattern. It can reduce excess fabric and may place access panels, vents, and reinforcements more accurately. Custom work usually costs more and may require the trailer’s year, make, model, centerline length, and photos.
Universal-Fit Covers: A Sized Solution
Most universal travel trailer covers are not one literal size. They come in several length ranges with standard width and height allowances. They are easier to find and often cost less, but they depend on correct cinching and strap adjustment. A universal cover that is too large can flap; one that is too small can stretch over corners and accessories.
Choosing the Right Cover for Your Travel Trailer
Compare at least these features before buying:
- Approved trailer type and measurement method
- Length, width, and height range
- Climate and UV rating
- Water resistance and breathability
- Air vents that reduce condensation and wind lofting
- Reinforced roof, corners, and stress points
- Front and rear cinching systems
- Underbody straps and weighted toss straps
- Zippered door access in the correct location
- Included gutter, ladder, or corner protectors
- Warranty exclusions, especially for wind or abrasion
Note: A travel trailer cover is not a pest barrier. Rodents and insects can still enter through gaps in the trailer. Seal openings, remove food, and use separate pest-prevention steps that are safe for the RV.
Installing the Cover on Your Travel Trailer
Read the cover’s instructions before installation. The following sequence matches common manufacturer guidance, but the product manual controls.
- Clean and dry the trailer. Dirt trapped under moving fabric can be abrasive. Make sure the roof and exterior are dry.
- Retract and secure equipment. Close windows and roof vents, retract slide-outs and awnings, fold steps, and secure antennas as directed.
- Pad sharp points. Protect rain-gutter spouts, ladder ends, steps, corners, and other abrasive edges with the supplied caps or soft padding.
- Identify the front and inside. Lay the cover on a clean surface, untangle the straps, and find the front label before lifting it.
- Use a helper. Work from the front or rear as the manual directs. Keep the cover away from the ground and sharp parts as much as possible.
- Lower the sides evenly. Center the roof panel, then bring the side panels down without dragging them across rough edges.
- Cinch the front and rear. Remove excess slack using only the built-in adjustment system.
- Connect the underbody straps. Tighten them moderately. Do not over-tighten or add ropes and straps unless the manufacturer permits them.
- Inspect the fit. Check corners, roof accessories, access panels, hems, and every buckle. No section should be stretched tight or left to flap freely.
Covercraft’s RV cover installation guidance recommends cleaning the RV, padding sharp edges, and keeping bottom straps moderately tight rather than over-tightening them.
Warning: A storage cover is not designed for towing. Remove it before moving the trailer. Do not occupy the RV or operate fuel-burning equipment while the full cover is installed, and never block required appliance vents.
Maintaining and Caring for Your Travel Trailer Cover
Inspect the cover during storage, especially after high winds, heavy rain, or snow. Correct loose straps, trapped fabric, shifted padding, and pooled debris before they cause abrasion or tearing. Also check the RV underneath at reasonable intervals for leaks, condensation, pests, and finish damage.
How to Clean the Cover
Follow the care label for your specific fabric. Covercraft’s current RV-cover care guide recommends rinsing loose debris, spot-cleaning with mild natural soap and lukewarm water, rinsing thoroughly, and allowing the cover to air-dry completely. It warns against strong detergent, bleach, abrasive cleaners, and machine drying.
Inspect and Repair Early
Look for thin fabric, loose stitching, torn strap anchors, damaged buckles, and wear at gutters or corners. Follow the manufacturer’s repair and warranty instructions. Continuing to use a torn or poorly secured cover can enlarge the damage and expose the trailer.
Store the Cover Completely Dry
Remove dirt and let the cover air-dry on both sides before folding it. Store it in its bag or in a clean, dry, ventilated place away from sharp tools, chemicals, rodents, and direct sunlight. Never pack a damp cover into a sealed container.
Before purchasing, compare your recorded measurements with the official sizing chart for the exact cover. The correct chart matters more than a general rule because manufacturers define trailer length and height differently.
Frequently Asked Questions
What is a travel trailer cover?
A travel trailer cover is a fitted fabric enclosure used while the trailer is stored. It helps reduce exposure to UV light, rain, snow, dust, leaves, bird droppings, and other debris. It does not replace roof maintenance, leak repair, ventilation, or pest control.
Why is it important to measure a travel trailer for a cover?
Correct measurements help you select a size that reaches the intended areas without stretching or leaving excessive fabric. A poor fit can expose part of the trailer, strain seams, flap in wind, and rub the exterior finish.
How do you measure a travel trailer for a cover?
Place the trailer in its stored configuration, then measure the body length, width, and height using the endpoints shown in the cover maker’s diagram. Record bumpers, ladders, spare tires, roof accessories, and other protrusions separately. Compare the exact dimensions with the product’s size chart.
Do you include the hitch when measuring for a travel trailer cover?
Usually not. Many travel trailer covers are designed for the trailer body and exclude the A-frame hitch and tongue. However, use the instructions for the exact product because a specialty cover may use different endpoints.
Do you include the air conditioner and roof vents in the height?
Not automatically. Many covers are patterned with allowance for common rooftop accessories, so adding them again can lead to the wrong size. Follow the manufacturer’s height definition and note any unusually tall or nonstandard roof equipment.
Should slide-outs be open when measuring?
Measure with slide-outs retracted unless the cover is specifically designed and approved for storage with them extended. Standard travel trailer covers are normally sized around the stored body shape.
What size should you choose if the trailer falls between cover sizes?
Do not force a cover whose maximum length is shorter than the required measurement. Select the next manufacturer-approved range, then confirm that its width and height will not create excessive loose fabric. Contact the cover maker when the trailer is close to a size boundary.
What materials are commonly used for travel trailer covers?
Common covers use polypropylene, woven or ripstop polyester, and other layered synthetic fabrics. Construction varies by climate rating. Focus on UV resistance, water resistance, breathability, reinforced stress points, and the manufacturer’s care instructions rather than material name alone.
Can you tow a travel trailer with the storage cover installed?
No. Full travel trailer covers are intended for storage, not highway travel. Wind pressure can damage the cover and trailer, block lights, and create a serious road hazard. Remove and store the cover before moving the trailer.
Where can you purchase a travel trailer cover?
Travel trailer covers are sold by cover manufacturers, RV dealerships, RV parts retailers, and online stores. Buy by verified measurements and product specifications rather than model name alone, and review the warranty and return policy before ordering.
Sources
- Covercraft: How to Measure Your RV Cover — ADCO measurement endpoints and size-selection guidance.
- Classic Accessories: How to Measure RVs — brand-specific travel trailer measurement rules.
- Covercraft: RV Cover Installation Instructions — cleaning, edge protection, positioning, and strap guidance.
- Covercraft: How Do I Clean My RV Cover? — current cleaning and air-drying instructions.
- U.S. Environmental Protection Agency: Moisture Control and Mold — why controlling moisture helps limit mold growth.
- Occupational Safety and Health Administration: Ladders — stable setup, safe climbing, and top-step restrictions.