Quick answer: We could not verify a credible, current price range for a full RV roof replacement, so this guide gives none. Cost depends on roof size, membrane type, whether the wood underneath is wet or rotted, how many vents, air conditioners and other roof items must be removed and resealed, and the shop’s labor rate and region. The biggest swing is hidden water damage. Get itemized written quotes, and have the roof checked for moisture before you compare prices.
This is a decision guide, not a price list. Parts prices shown on Lippert’s catalog pages are retail product prices that change, and they are not a replacement quote, so none are repeated here. If your real problem is a leak you have already found, read RV water damage: signs and repair first.
What are the roof membrane options?
The material mostly decides the warranty, the sealant you must use, and how the roof ages. These are manufacturer claims, not independent tests. We did not find a neutral comparison, and each maker positions its own product against the others.
| Membrane | What the maker pages say | What to ask about |
|---|---|---|
| EPDM (rubber) | Dicor sells an EPDM membrane (EPDM Plus); read its current warranty document for terms. Thetford says EPDM came into RVs in the 1980s as a cheaper alternative to aluminum and became the choice of most RV makers. It chalks as it ages, usually starting around 12 to 18 months, which Thetford calls natural and not harmful. | Is the quoted warranty for aftermarket installs? Which adhesive and sealant does the maker require? |
| TPO | Dicor sells a TPO membrane (DiFlex II). Lippert’s Alpha SuperFlex is described as an olefin-based membrane that does not chalk or fade. Lippert’s warning: silicone will not adhere, so use its sealants only. | Is the sealant compatible with this exact membrane? Is it fleece-backed or not? |
| PVC | Dicor sells a PVC membrane (Tufflex). Get the maker’s warranty document for the exact product before work starts. | Which warranty applies to a shop install? |
| Fiberglass or aluminum roof | Thetford mentions rubber, fiberglass and aluminum roofs exist. We found no maker source on replacing them, so they are not compared here. | Ask the shop for its method and a written scope. |
Sealant matching matters. Lippert says silicone will not adhere to its membrane and sells its membrane, tape and sealants as a system. Follow the membrane maker’s installation guide.
What drives the cost of an RV roof replacement?
- Roof size. Longer and wider roofs need more membrane, adhesive and labor.
- Membrane type and brand. EPDM, TPO and PVC, fleece-backed or not, differ by maker.
- Condition underneath. If water has reached the wood, the repair grows from a new surface to carpentry. EPA says porous materials that get moldy may have to be thrown away, and to fix water problems quickly.
- Roof penetrations. Vents, skylights, air conditioners, antennas and solar mounts must be disturbed and resealed.
- Prep. Removing old sealant, tape and failed membrane takes time.
- Shop labor rate and region. We found no credible national figure, so assume this varies.
- Add-ons. New sealant on seams and trim, vents and covers replaced at the same time.
- Wait time and travel. Mobile service versus bringing the RV in.
Repair, reseal or replace? A decision list
- Is the membrane itself intact, with only streaks, chalk or mildew spots?
- Yes: that is cosmetic. Thetford says chalking is natural and not harmful, and that mildew spotting does not harm the roof’s integrity. Cleaning three to four times a year is Thetford’s advice for EPDM.
- Are the problems at sealant lines, vents or seams, with a sound membrane?
- Probably a reseal. Venture RV’s maintenance schedule lists roof sealant, sidewall sealants, roof vents and roof seams and joints as inspection items, and suggests an authorized service center inspect seams and joints. It recommends maintenance twice a year, spring and fall.
- Is there a torn, punctured or lifted area?
- A patch may work. Lippert sells patch kits and says to use its sealants only with its membrane. Ask a shop whether the tear is isolated.
- Has water entered the roof structure, or does the roof feel soft or flex underfoot?
- Stay off it and have a shop inspect before you spend on new membrane. Replacement without fixing a wet substrate hides the damage.
- Is the membrane failing across much of the roof?
- Replacement quotes make sense. Compare scope, not only price.
Questions to ask before approving a roof quote
- Is the quote itemized: membrane, adhesive, sealant, tape, labor, disposal?
- Which membrane and brand, and does its warranty apply to this install?
- Does the price include a moisture check and replacement of damaged wood?
- Which sealants and primers will be used, and are they approved for this membrane?
- What is included for vents, air conditioners and trim?
- Who handles a leak after the job, and for how long?
Will warranty or insurance help pay?
Usually not for age-related roof failure. Venture RV’s limited warranty excludes weather, wear and tear, and failure to do routine maintenance, and names sealing as an example. Thor’s warranty guide says warranties do not cover accidents, collisions, natural disasters, theft or vandalism, and that RV insurance handles those. Hail or a falling branch is a question for your insurer, not a warranty. See our extended warranty guide. A leak that reaches the ceiling or walls can also reach appliances: water heater compartments and the gas fridge area are places to look.
When should I call a professional?
- The roof is soft, bowed or flexes when you step on it. Do not walk on it.
- You find stains or mold inside after rain. EPA says if mold covers more than about 10 square feet or water damage is large, treat it as a bigger job.
- The membrane type is unknown or the repair needs a specific sealant system.
- You cannot safely work at roof height.
FAQ
How long does an RV roof last?
The maker pages we reviewed describe products and warranties, not lifespans, and warranty terms vary by product and by whether it was a factory or aftermarket install. A warranty term is not a promise of service life.
Is chalking or black streaking a sign the roof has failed?
Not by itself. Thetford says EPDM chalking is a natural process, usually starting around 12 to 18 months and varying by climate, and that mildew spotting does not harm roof integrity.
Can I use any sealant on my membrane?
No. Lippert says silicone will not adhere to its membrane and to use Lippert-supplied sealants. Check the membrane maker’s instructions before you buy sealant.
Is a roof replacement covered by RV insurance?
That depends on your policy and the cause of damage. Thor’s guide says insurance, not warranty, is the usual route for accidents and natural disasters. Ask your insurer before work starts.
What is the average RV roof replacement cost?
We could not confirm a credible national figure from a reliable source, so this guide does not give one. Ask two or three shops for itemized quotes for your rig.
Sources
- Lippert: RV Roof Repair and Sealants: product categories (sealants, lap sealant, coatings, adhesives, kits, membranes, tape), kits and membranes sold separately
- Lippert: SuperFlex RV Roof Kit (26 ft and above): kit contents, membrane sold separately, do not use silicone, use Lippert-supplied sealants
- Lippert: RV Roof Membranes: SuperFlex described as an olefin-based membrane, install with the maker’s adhesives and sealants
- Thetford: Rubber Roof Care and Protection: EPDM history in RVs, chalking and mildew facts, cleaning frequency
- Venture RV Owner’s Manual with One-Year Limited Warranty: maintenance schedule items, warranty exclusions for weather and sealing neglect
- Thor Industries: RV Warranty Guide: warranties do not cover accidents, collisions, natural disasters, theft or vandalism; insurance handles those
- US EPA: Mold Cleanup in Your Home: act quickly on moisture, fix leaks, porous materials may need to be discarded
Last reviewed: 2026-10-18
