# RV Panel Replacement for Aluminum, Filon, and Laminated Walls > RV panel work at our Westminster shop generally runs $1,200 to $9,000 or more, driven mostly by how much trim has to come off and how far the paint blend reaches. A single aluminum siding sheet on a trailer sits near the bottom of that range. A laminated sidewall section on a motorhome, with structural adhesive, core work, and a full side blend, sits near the top. | | | | --- | --- | | Business | OCRV Center | | Service area | Westminster, Orange County, Southern California | | Facility | 23281 La Palma Ave, Yorba Linda, CA 92887 | | Phone | (949) 799-3387 | | Email | info@ocrvcenter.com | | Typical range | $1,200 to $9,000+ | | Source | https://ocrv.online/services/panel-replacement/ | RV panel replacement is one of those jobs where the damaged area is the small part of the bill. Removing a sheet means pulling the corner and seam molding that traps its edges, drilling out rivets, cutting butyl tape loose, and getting the new panel in flat before anything gets rebedded. Owners in Westminster are often surprised that fixing a two foot gouge means trim comes off across an entire side. This page explains why, and what it costs. ## How RV Wall Panels Are Actually Attached There are three attachment systems on modern RVs and they behave very differently. Aluminum siding on stick-and-tin trailers is screwed or riveted to the studs with the sheet edges trapped under seam and corner molding, and the whole assembly relies on butyl tape under the trim to keep water out. Filon and laminated wall sections are bonded to the wall as a single vacuum-pressed sandwich. Commercial and utility panels are often screwed with sealing washers into a steel or aluminum frame. Knowing which one you have determines the entire job plan. A riveted aluminum sheet can be removed on its own if you take the molding off, and the panel below it stays put. A laminated wall section is structural. Cutting it means you are cutting a load path, and the replacement has to be bonded back with the correct structural adhesive and clamped or vacuumed to a flat plane while it cures, or the wall will read wavy in daylight forever. The fasteners tell their own story too. Screws with butyl sealing washers are meant to be removed and replaced, and every one of them should get new sealant on reinstall. Rivets are one-time fasteners that get drilled out and set fresh. Structural adhesive is not reversible at all. That difference is why an adhesive-bonded panel costs more to swap than a riveted one even when the visible damage is identical. - Rivets and screws with butyl washers on aluminum siding over studs - Structural adhesive on laminated fiberglass and filon sidewall sections - Seam, corner, and belt molding that traps and seals the panel edges - Butyl tape under every piece of trim and behind every flange - Interior paneling and cabinetry that sometimes has to come out for access - Screws with sealing washers on commercial and utility bodies ## Aluminum Siding Sheet Replacement Done Sheet by Sheet Aluminum siding is installed in vertical or horizontal sheets that run the height or length of a wall, with the edges tucked under molding. The good news is that the smallest repairable unit is one sheet, so a gouge, tear, or crease that lives inside a single sheet does not require touching the neighbor. The bad news is that you cannot get one sheet out without releasing the trim that holds it, and that trim usually runs the full length of the side. The sequence is straightforward but not quick. Remove exterior lights, vents, and any accessory bolted through the wall in the work area. Pull the seam and corner molding, cutting old butyl loose as you go without gouging the sheets you are keeping. Drill out the rivets along the studs. Slide the damaged sheet out, inspect the framing and insulation behind it for water damage, then dry fit the replacement and set new rivets on fresh layout. Behind-the-sheet inspection is the part that changes estimates. If the studs are dark and soft, or the insulation is packed down and damp, you have a water intrusion history that has to be dealt with before the new panel goes on. We stop and call you at that point with photos rather than covering it up, because a new sheet over rotted framing looks perfect for about one rainy season. ## Filon and Laminated Sidewall Sections Filon is a fiberglass reinforced panel that comes in smooth or pebbled finish and is bonded to a foam or luan core as part of a laminated wall. It is not a skin you peel off. The wall was built as a sandwich in a press at the factory, and repairing it means cutting a section of the sandwich out, building the core back to the exact same thickness, and bonding a new skin section in with structural adhesive under even clamping pressure. Thickness discipline matters more here than anywhere else in the job. If the new core is a sixteenth of an inch proud or shy of the original, that step telegraphs through the skin and shows in reflection along the whole side. We shim, we clamp, and we check with a long straightedge before the adhesive kicks. On larger sections we build a caul board and clamp across the full patch so the panel cures against a flat reference rather than against whatever the wall wanted to do. There is also a seam question. On aluminum you have natural breaks at every molding line. On a laminated wall the exterior is one continuous surface, so the repair edge is wherever we cut it. That means the finish work has to hide a joint that has no natural home, and the blend usually runs from the repair out to the nearest real break such as a slide opening, a body line, or the corner. ## Trim Removal and Rebedding the Seams Every piece of molding you remove is a piece of molding that has to be rebedded correctly. Old butyl tape does not get reused. It gets scraped off both surfaces, the substrate gets cleaned with solvent, and a new run of butyl goes down before the trim is set and the screws are driven to an even snug rather than crushed. Overdriven screws squeeze the butyl out from under the flange and leave you with a dry spot that will find water. Corners are the highest risk area on the whole vehicle. A corner molding has to seal two planes and a transition, and it is exactly where wind-driven rain and pressure washing find their way in. We use butyl under the flange for the mechanical seal and a compatible non-hardening exterior sealant along the top edge as the weather bead, and we do not mix sealant chemistries that fight each other. This is also why one damaged sheet can mean trim comes off across a whole side. If the seam molding runs continuously from the front cap to the rear cap, there is no way to release the middle of it without disturbing the ends. Once it is disturbed, the honest move is to rebed the entire run rather than patch back the section you touched and hope the rest is still sealed. - Old butyl scraped off both mating surfaces, never reused - Solvent clean and dry before new tape goes down - Fresh butyl under every flange, set with even screw torque - Non-hardening exterior sealant as the weather bead on top edges - Compatible sealant chemistry so the new bead bonds to what is there - Full molding runs rebedded rather than patched mid-run ## Matching a Siding Profile That Is No Longer Made Aluminum siding comes in profiles: flat, lightly ribbed, deeply corrugated, and a range of proprietary embossed patterns that specific builders used for a few model years and then dropped. When your profile is discontinued, you have three honest options and we will price all three rather than pretending the first one always works. Option one is sourcing surplus stock from a supplier who still has coil in that pattern, which happens more often than owners expect. Option two is replacing a larger area with a currently available profile that reads correctly on its own, usually a full side or a full section between two natural breaks, so the eye never sees two patterns meeting in the middle. This costs more in material and paint than a single sheet but it produces a result that looks intentional instead of patched. Option three, on smooth siding only, is a filon or aluminum overlay panel bonded and trimmed to a body line. What we will not do is put a mismatched profile next to your original and call it done. A ribbed sheet beside a flat sheet catches light differently at every hour of the day, and it is the first thing a buyer notices at resale. If the profile is gone, we would rather have the harder conversation about a larger scope at the estimate stage than hand you a repair you will regret. - Identify the exact rib pitch and depth with a profile gauge, not by photo - Check surplus coil stock in the original pattern before widening scope - Expand the replacement to a natural break if the profile has to change - Consider a bonded overlay panel on smooth siding where it fits the design - Avoid meeting two different profiles in the middle of a visible wall ## Paint Blending and What the Final Bill Includes New siding arrives either in mill finish or in a stock color that will not match a sun-aged wall, so paint is not optional on most panel jobs. We take a color reading, spray a test card, and confirm the match against the actual panel in daylight before committing. Then we plan where the blend ends, which on aluminum is usually a molding line and on a laminated wall is usually a body line, a slide opening, or the cap seam. Blend size is the single biggest swing factor in the price after the panel itself. A single sheet between two molding runs is a contained refinish. A laminated section in the middle of a smooth wall may need half the side to make the transition invisible, and full side work brings masking, adjacent panel prep, and more paint hours with it. Body and paint labor is $210 per hour and paint supplies bill at $55 per paint hour. The estimate itemizes panel material, molding and butyl, rivets and fasteners, labor by operation, paint hours, and paint supplies separately. Parts carry 100 percent markup at or under $100 and 35 percent over $100, sales tax of 7.75 percent applies to parts and materials but not labor, and any job above $2,000 takes a 50 percent deposit so material can be ordered. Call our office at (949) 799-3387 to start. ## Frequently asked questions ### Can you replace just the damaged part of a panel? On aluminum siding, the smallest practical unit is one full sheet, because the sheet edges are trapped under molding and a mid-sheet splice would leave a visible horizontal or vertical seam where none belongs. On a laminated fiberglass wall you can cut and bond a section rather than the whole wall, since there is no natural break to work to anyway, but the core has to be rebuilt to the exact original thickness and the skin bonded under even clamping pressure. Either way the visible damage size is a poor predictor of the job size. What matters is where the nearest honest boundary sits. ### My siding pattern is discontinued. What are my options? Three, and we price all of them. First, we try to source surplus coil in the original profile, which succeeds more often than owners expect. Second, if the pattern is truly gone, we replace a larger area bounded by natural breaks with a currently available profile, so you never see two different patterns meeting mid-wall. Third, on smooth siding only, a bonded overlay panel trimmed to a body line can work. We will not install a ribbed sheet beside a flat one and call it finished, because that mismatch catches light at every hour of the day and it is the first thing a buyer notices at resale. ### Why does trim have to come off the whole side for one panel? Because the seam and corner molding that traps your panel edges usually runs continuously from the front cap to the rear cap. There is no way to release the middle of a continuous run without disturbing the fasteners and the butyl at both ends. Once that seal is disturbed, patching it back and hoping the rest still holds is how leaks start six months later. The honest move is to scrape the old butyl off both surfaces, clean, and rebed the full run with fresh tape and even screw torque. It adds labor, and it is the difference between a repair that seals and one that looks sealed. ### What is filon and how is it different from aluminum siding? Filon is a fiberglass reinforced plastic panel, available smooth or pebbled, that is bonded to a foam or luan core in a factory press to form a laminated sidewall. Aluminum siding is a thin metal skin hung mechanically on studs with rivets or screws and sealed by trim. The practical difference is reversibility. Aluminum comes off with a drill and a scraper and goes back with new rivets. A filon wall is a bonded sandwich, so repair means cutting a section, rebuilding the core to exact thickness, and bonding a new skin with structural adhesive under clamping pressure. That is why laminated work sits at the higher end of the price range. ### How long does panel replacement take? Usually one to four weeks. A single aluminum sheet with an available profile, contained blend, and no water damage behind it can move through in about a week. Timelines stretch when the siding profile has to be tracked down, when a laminated wall needs clamped adhesive cure that cannot be rushed, or when we open the wall and find soft framing that has to be repaired before the new panel goes on. We give you a written sequence at approval and call you with photos rather than quietly extending the schedule if the scope changes once trim is off. ### Will the new panel leak? Not if the rebedding is done properly, and that is most of the labor on this job. Every piece of molding gets old butyl scraped off both mating surfaces, a solvent clean, fresh butyl tape under the flange, and screws driven to an even snug rather than crushed, because overdriven screws squeeze butyl out and leave dry spots. Top edges get a compatible non-hardening exterior sealant as the weather bead. Corners get extra attention since they seal two planes plus a transition. We also water test the repaired area before the unit leaves, so a problem shows up in our bay rather than in a storm. ### Can I keep my original decals or graphics? Not on the replaced panel. Vinyl graphics do not survive removal from a damaged sheet in reusable condition, and older vinyl that has been baked by Southern California sun for years becomes brittle enough that it cracks as soon as it lifts. What we can do is photograph and measure the existing layout, then reproduce the graphic on the new panel and blend the edges so the pattern lines up across the seam. On older units where the surrounding vinyl has faded, we will show you a sample so you can decide whether to redo a larger area or accept a visible difference in gloss. ### How much of the price is paint rather than the panel? Often more than half on a laminated wall, and a meaningful share even on a single aluminum sheet. New siding shows up in mill finish or a stock color that will not match a sun-aged wall, so refinishing is nearly always part of the job. The swing factor is blend size. A sheet contained between two molding runs is a small refinish area. A section in the middle of a smooth laminated wall may need half the side to hide the transition. Body and paint labor bills at $210 per hour, and paint supplies add $55 per paint hour, both itemized on your estimate. --- OCRV Center performs all work in shop at 23281 La Palma Ave, Yorba Linda, CA 92887. Serving Westminster and Orange County. Call (949) 799-3387 or email info@ocrvcenter.com. Posted labor rates are published at https://ocrv.online/prices/.