RV roof replacement is one of the larger repair investments an owner will make — and also one of the most variable. A travel trailer roof and a Class A motorhome roof are different jobs with very different price tags, and the condition of the decking underneath the membrane changes the cost dramatically. San Diego RV Center has been replacing RV roofs since 1990, and the questions we hear most often in 2026 are: what’s it going to cost, and what’s driving that number?
Here’s what San Diego-area owners are actually paying this year, broken down by material, rig size, and scope of damage.
Average Cost by Roof Type
Roof replacement costs vary significantly by material. The three most common RV roof membranes each have different material and installation costs:
EPDM (rubber membrane): Installed cost runs $7 to $13 per square foot. For a typical 30-foot motorhome with roughly 300 square feet of roof, that’s $2,100 to $3,900 for the membrane and installation alone — before decking, before resealing all penetrations, and before removing the old membrane. According to Angi’s 2026 roofing data, EPDM is the most cost-effective rubber membrane option for larger surface areas.
TPO (thermoplastic polyolefin): TPO runs $8 to $14 per square foot installed. It’s more resistant to UV degradation than EPDM — relevant in Southern California, where UV load is significantly higher than national averages. San Diego’s sun accelerates membrane breakdown, and TPO’s UV resistance often makes it worth the modest price premium for owners who plan to keep the rig.
Fiberglass and aluminum: Fiberglass roof panels are common on Class A coaches and tend to be the most expensive — material costs are higher, and installation requires more labor. Aluminum roofs, found on older units and some fifth-wheels, are typically more affordable to reseal than to fully replace, depending on condition.
What Drives the Final Number Up
The membrane itself is rarely the biggest variable. What changes a $4,000 quote to a $9,000 quote is usually what’s underneath it.
Water infiltration that’s been ongoing for months or years softens the plywood or luan decking below the membrane. In San Diego, the culprit is almost always a sealant failure around a vent flange, antenna mount, or AC unit — the kind of gap our roof sealing guide covers. Soft or delaminated decking has to come out and be replaced before a new membrane goes down — which adds $500 to $3,000 depending on how far the damage extends. Our roof delamination repair article explains what that process looks like.
Other cost drivers: the number of penetrations that need to be sealed and retrimmed (vents, skylights, AC units, antennas), whether any interior ceiling panels have to come down to dry out the structure, and whether any wall-to-roof joint sealing is needed. Stripping the old membrane adds $500 to $1,500 to most estimates.
Cost Differences by Rig Type
Size drives cost directly — more square footage means more material and more labor. But rig type also matters for the complexity of the installation:
Travel trailers (20–30 ft): Full membrane replacement typically runs $2,500 to $5,500 with standard decking. More compact roof, fewer penetrations, shorter labor time.
Fifth-wheels (30–40 ft): The elevated front section adds complexity. Full replacement runs $4,000 to $8,000 depending on the material and decking condition.
Class A motorhomes (32–42 ft): The largest roofs, and often the most penetrations (multiple AC units, solar, antennas, vents). Full replacement on a Class A runs $6,000 to $15,000+ for high-end materials with decking repair included. According to Roofing Cop, Class A motorhomes at the upper end of the size range with fiberglass roofs can reach $12,000 to $18,000 for full replacement when significant decking damage is present.
Repair vs Full Replacement: Where’s the Line?
Not every roof problem requires full replacement. A roof that’s in otherwise sound condition with a localized failure — a single failed vent seal, a cracked section of EPDM near the AC unit — is often a repair job, not a replacement. Our roof repair services cover targeted repairs from a few hundred dollars up to partial panel replacements.
The threshold for recommending full replacement is typically: membrane that’s past its service life across most of the roof, multiple concurrent failure points, or decking damage that extends beyond a localized area. If your roof is 10 to 15 years old, a full inspection before committing to another targeted repair makes sense — patching a failing membrane is a short-term fix on a structure that will keep failing.
Does Insurance Cover Roof Replacement in San Diego?
It depends on the cause. A replacement triggered by storm damage, a falling tree limb, or hail is typically covered under comprehensive RV insurance. A replacement that’s the result of deferred maintenance and gradual membrane deterioration is not — that’s a wear-and-tear exclusion.
California law gives policyholders specific protections in the claims process. Our article on filing an RV insurance claim for roof damage covers the full process, including documentation requirements and California’s 40-day adjuster response requirement. If there’s any possibility a covered event contributed to the damage, document it thoroughly before getting repairs underway.
What to Expect From a San Diego Estimate
A legitimate estimate for RV roof replacement should itemize: membrane material and labor, old membrane removal, sealant and trim for all penetrations, and a line for contingency decking repair. Any estimate that doesn’t address the decking question is incomplete — the condition of what’s underneath doesn’t get confirmed until the old membrane comes off.
San Diego RV Center provides written estimates that include a decking assessment and separate line items so you can see exactly what the cost covers. We’ve been serving El Cajon and all of San Diego County since 1990. Contact us for a roof assessment — we’ll tell you whether you’re looking at a repair or a full replacement before you commit to either.
Cost-Saving Mistakes That Usually Cost More
The two most common: waiting too long, and using the cheapest shop on the first call. Water infiltration that reaches the decking doubles or triples the repair scope — an owner who addressed a sealing failure at $300 two years ago and waited now needs $6,000 in decking and membrane work. Deferred roof maintenance is the highest-cost decision in RV ownership.
On the shop side: RV roof work requires familiarity with the specific membrane system, penetration sealing sequence, and decking attachment methods for your rig type. A general roofing contractor working on an EPDM RV roof for the first time will miss things that a shop with 30+ years of RV-specific experience catches as a matter of routine. Our general repair services include technicians trained on every major membrane system in production today.
Frequently Asked Questions About RV Roof Replacement Costs
What’s the average cost to replace an RV roof in San Diego?
For a typical 30-foot travel trailer or fifth-wheel in sound structural condition: $3,000 to $6,000. For a Class A motorhome with multiple penetrations: $6,000 to $12,000+. Decking damage in either case adds $500 to $3,000 depending on extent.
How long does an RV roof replacement take?
A straightforward membrane swap on a travel trailer takes one to two shop days. A full Class A replacement with decking work takes three to five days. We’ll give you a more specific timeline after the initial inspection confirms what’s underneath the membrane.
Is EPDM or TPO better for San Diego’s climate?
Both work well, but TPO’s UV resistance is a meaningful advantage given Southern California’s solar intensity. EPDM is the more economical choice and performs reliably if maintained. For a rig that’s parked outdoors most of the year in San Diego, TPO is worth considering.
Can I get a price estimate before bringing the rig in?
Call us at (619) 561-3531 with your rig’s make, model, year, and length — we can give you a range estimate over the phone. A precise number requires seeing the roof condition in person, since decking assessment changes the scope.
Get a Straight Answer on Your Roof Replacement Cost
San Diego RV Center provides itemized estimates that separate membrane, labor, and decking costs so you know exactly what you’re paying for. We’ve been doing this since 1990 — no surprises after the job starts.
Schedule a Roof Assessment or call us at (619) 561-3531.