Every camper roof has the same weak spots. Here's why more sealant won't keep them dry.
You've probably never spent long on your roof, and that's normal. The trouble is that the roof is where rain sits the longest, and it gets in at the same few places whatever the roof is made of. Here's where that happens, why the usual fixes only buy time, and a straight answer to the worries we hear most about covering it.
By Anders from the warehouse.
Last updated October 10, 2026.
Summary: Water gets in where the roof is sealed: the seams at the front and back, the joint where the roof meets the wall, and around every vent, the antenna and the A/C. Sealant shrinks and cracks with time, and a new layer on top doesn't reach wood that's already wet underneath. A tarp and a full-body cover each bring problems of their own. A cover for just the roof keeps the rain off those seams, and the worries owners raise about covers are answered further down.
The cover itself: black 210D Oxford, waterproof and sun-resistant, nine lengths from 18 to 44 ft, all 10 ft wide, from $199 for one. The edge hangs 12 to 16 inches down the sides, one person puts it on, shipping to the US is free and takes 5 to 10 business days, and you get 90 days to send it back or get a refund.
1. Water gets in where the roof is sealed, not where you'd think to look.
Rubber, fiberglass or aluminum, the weak spots are the same. There are the seams at the front and back, and the long joint where the roof meets the wall. Then there's every hole cut through the roof: the vents, the antenna, the A/C unit. Each of those places is kept watertight by sealant, and sealant wears out with the years. Over time it shrinks, cracks and pulls away from the edge it was meant to seal, and that gap is the way in.
2. You won't see the damage from the ground. You'll find it from the inside.
Under a rubber roof sits wood decking, and wood that stays wet starts to rot. What makes it costly is how quietly it happens. Water that slips past a cracked seam doesn't have to drip on day one, so it soaks into the wood instead, sometimes for a whole season. It often shows up inside first: a stain on the ceiling, a corner that smells damp, or a spot on the roof that gives a little under your foot. By the time you notice any of that, the wood under the membrane has been wet for a while.
3. Why another tube of sealant only buys time.
So the usual answer is another bead of sealant on top, and on a seam that has only just started to crack, that's sound upkeep. Keep doing it. Once water is in the structure, though, a fresh layer on the outside doesn't reach the wet wood underneath. It covers the crack but not the damage under it, and every season of patching is one more season the real repair waits while the wood gets worse. What the seams need is less water standing on them in the first place.
4. A tarp or a full-body cover trades one problem for another.
A plastic tarp is cheap and goes on fast, but it moves in the wind, and a tarp that moves rubs against the rig all season while it holds moisture underneath. A full-body cover is the opposite bet. Because it wraps everything, it's heavy to get into place alone, and all winter it lies against the paint and the decals on every side. Ask the owner of one how many winters it actually went on.
5. Cover just the roof, and leave the rest of the rig alone.
This cover takes only the roof, because that's where the rain sits. The black 210D Oxford fabric is waterproof and made to take the sun, so water runs off instead of standing at the seams. The edge hangs 12 to 16 inches down the sides, which keeps the joint between roof and wall under fabric too. It fits over rooftop A/C units, roof vents and skylights, and since nothing hangs lower than that edge, the door, the windows and the hatches stay clear. One person puts it on: unfold it on the roof, latch the webbing straps under the edge of the body on all four sides, and pull the two reinforced straps across the top.
Your length, your price, before you click anything
Every size is 10 ft (3 m) wide, so the only thing to measure is the length: the body, hitch not included, rounded up to the next size when you land between two. One cover costs what its row says. On the product page the bundle box opens on a 2-pack, so with one RV, switch it to 1 pack and you pay the row.
Nothing here is shorter than 18 ft or wider than 10 ft. A smaller rig, or a wider one, needs a different cover, and we'd rather lose the sale than your trust.
The worries we hear most, answered straight
Won't it trap moisture and grow mold under there?
It can if it goes on wet, so don't put it on wet. The fabric is waterproof, which means little air moves under it. Wait for a dry day, and lay something under it that keeps a gap; a pair of pool noodles down the center line does it. A spacer that lifts the cover off the roof is in the works, with no date and no price yet.
Won't it rub the roof and the paint when the wind blows?
A full cover rubs because it hangs loose down every side. This one covers the roof and only the top 12 to 16 inches of the walls, and it's strapped on all four sides with two more straps across the top, so the wind can't get under it and lift it. The straps are woven webbing, not elastic, so they don't stretch out.
Won't it be shredded after a season or two?
We can't tell you how many winters it lasts, because we haven't measured that, and a number nobody measured is worse than no number. What we can give you is time to find out: 90 days to put it on, leave it through the first storms, and send it back or get your money back if it isn't holding up.
Isn't it a two-person job?
One person does it. The bundle goes up on the roof, you pull it out from the middle toward both ends, and then you walk around the rig and latch the straps one by one. After the season it folds down to an armful. Doing the whole job from a ladder, without stepping onto the roof, is the one thing we can't promise.
Can I still get into the rig?
Yes. The cover stops 12 to 16 inches below the edge of the roof, so the door, the windows and the hatches stay clear all winter, and you can go in and check on things whenever you like.
Will it fit over my A/C?
Yes. It fits over rooftop A/C units, roof vents and skylights. With a lot of gear up there, or a very tall A/C unit, go one size up.
My rig is built to sit outside. Why cover it?
The walls are, because rain runs straight off them. Up on the roof, water lies still right on top of the seams, and those seams stay tight only as long as the sealant around them does. A cover doesn't make the rig any tougher. It just takes the standing water off the one surface that has to fight it all winter.
My dealer said covers do more harm than good.
Ask what harm they mean. The reason dealers tend to give is a cover that shifts in the wind and rubs the finish and the roof. That's what a loose cover does, and it's why this one is strapped on all four sides with two more straps across the top. If you'd rather see it for yourself than take our word or theirs, that's what the 90 days are for.
Is it worth the money?
It's priced by length, from $199 for 18 and 21 ft up to $389 for 44 ft, and the table above shows the price for one cover. Hold that up against a repair to the wood under your roof, and then decide.
Will it carry snow?
It's made to stay on from fall to spring, and if heavy wet snow builds up, you shovel it off, just like you would without a cover. A number for how much snow the fabric holds doesn't exist on our side, so you won't find one here.
Does it fit a fifth wheel?
Measure the main flat part of the roof and pick your length from that. Whether the cover also reaches over the raised front above the hitch, we don't have the maker's answer, so we don't claim it.
What about solar panels?
The cover goes over them, so they're covered while it's on. If your batteries depend on the panels through the winter, this cover works against you, and we'd rather say so.
How long does shipping take?
Free to the US, and 5 to 10 business days to your door.
So what do the people who do cover the roof do differently?
They stop waiting for the perfect cover and buy the one they'll actually put on. Length off the table, bundle box set to 1 pack, and the 90 days treated as a test drive rather than a warranty: on goes the cover before the first real rain, and the day it turns out the A/C or the straps make it wrong for their rig, back it goes.
The box holds one cover in the length you picked: black 210D Oxford that sheds rain and takes the sun, 10 ft across, woven webbing straps on all four sides with hooks for the edge of the body, and two reinforced straps for the top. When the season ends it folds small enough to carry under one arm. It ships free to the US in 5 to 10 business days, and it comes with the one thing we can actually promise: 90 days to return it or get your money back.
I'll be honest:
this cover isn't for every rig. Shorter than 18 ft or wider than 10 ft, and none of the nine sizes fit, so keep your money. Parked somewhere damp with no way to leave a gap under the cover, and you're better off waiting for the spacer. And if you want the sides and the wheels wrapped too, buy a full-body cover from someone who makes one.
There are also two things about it we don't know: the raised front of a fifth wheel, and how much snow it holds. We don't have the maker's answer on either of them, and an honest gap beats a confident guess.
Last, the price. It's set by length, from $199 at 18 and 21 ft to $389 at 44 ft, and the table above is the price for one cover. The bundle box on the product page opens on a 2-pack, so if you own one rig, click it down to 1.
That's why you can try it risk-free.
Read your length off the table, or open the product page and pick it there. Then let the 90 days do the deciding. Wrong size, wrong roof, wrong idea, whatever the reason, tell us within 90 days and either the cover comes back to us or the money goes back to you. Shipping to the US costs you nothing.