Why Your RV Estimate Tripled After Teardown

What the First Estimate Is Actually Measuring

The first estimate on a collision job is written from what a person can see. Sometimes that person is standing next to the coach with a flashlight, and sometimes it is an adjuster looking at six photographs taken in a parking lot at dusk. Either way the document describes surface evidence: a cracked fiberglass panel, a scuffed corner, a bent awning rail, a window that took the hit. Nobody is guessing at what sits behind that skin, because nothing behind the skin has been opened yet. That number is a starting point for the claim, not the end of it.

A laminated sidewall is not a panel. It is a bonded sandwich: gelcoat and fiberglass on the outside, adhesive, a core of block foam or Azdel, an interior substrate of luan or composite board, and an aluminum stud cage carrying the whole assembly. The bond between those layers is what gives the wall its stiffness, and the wall spreads load across its full height. When something strikes it, the impact does not stop at the point of contact. Force travels through the adhesive line and separates layers well outside the dent you can photograph.

So the visible damage on a laminated coach is a symptom rather than a scope. Experienced estimators know this and say so on the first visit. The honest version of that conversation sounds like a range instead of a promise: here is what we can see, here is what we usually find behind this kind of hit, and here is what teardown will settle. California requires a written estimate and your authorization before work begins, so nothing gets opened and billed without your signature on a document you have read first.

What Comes Out of the Wall During Teardown

Teardown means pulling trim, moldings, the window, the interior panel, and sometimes cabinetry until the bond line is visible and the aluminum can be inspected. It is measurement, not demolition. A technician taps along the wall listening for hollow response, reads a moisture meter through the substrate, and lays a straightedge across the skin to find where the surface stops being flat. Everything that comes off gets photographed in place before it is removed, because those images are the evidence a supplement is later approved on.

What shows up varies by hit, but the pattern repeats. Bond line separation running two or three feet past the impact point. Block foam crushed until it has lost its compressive strength, so it will no longer hold a fastener or carry load. Luan that reads wet on a meter and comes apart in the hand. An aluminum stud bent behind an intact skin. A cracked cap flange sitting under a trim strip that looked perfect from ten feet away. A window frame that no longer sits flat in its opening and will not seal again.

Then there is what lives inside the cavity. Twelve volt runs, thermostat wire, speaker leads, and often a PEX line or a drain routed between studs. A screw driven blind during a fast repair finds one of those eventually. Once the wall is open, prior work surfaces too: mismatched adhesive, a patch of butyl where a factory seal used to be, staining that clearly predates the loss. Older damage gets separated out and does not go on the claim, which is a conversation better had at teardown than at final invoice.

Why Car Repair Math Does Not Transfer

Automotive collision work runs on published information. A unibody car has factory dimension charts, designated sectioning points where the manufacturer states a rail may be cut and joined, and estimating guides that assign a labor time to nearly every operation. Two shops on opposite coasts pull the same figure for the same bumper on the same model year, and the adjuster has that database open as well. Disagreements end up being about scope, not about how many hours it takes to blend a quarter panel.

None of that exists for a 40-foot coach. The chassis comes from one manufacturer, the house from another, and the house was assembled on a line where a run of 300 units may include three floor plan changes. There are no published sectioning points for a laminated sidewall, no factory dimension chart for the house structure, and no database time for cutting in a six foot laminate section and bonding it back to the stud cage. Labor is written from measurement, experience, and what the wall looks like once it is open.

That is why scope discovery happens in the bay instead of in a database, and it is why the estimate moves. It also explains a common friction point. An adjuster who writes forty automobile claims a week is used to a file that is settled on day one. Photographs of exposed structure, moisture readings, and a line by line explanation of every operation are what move that conversation, because they replace a general opinion about RVs with a specific record of one specific wall.

How a Supplement Actually Moves

A supplement is a formal amendment to the approved estimate. The shop photographs exposed damage as it is uncovered, writes the added operations line by line with the hours and parts each one needs, and submits the package to the adjuster handling the file. Nothing on that list should be a lump sum. If a stud is being replaced, the supplement shows the stud, the fasteners, the adhesive, the labor to cut it in, and the refinish time that the repair itself creates on the surrounding panel.

The adjuster reviews the submission, and on a larger loss will often schedule a reinspection to look at the open wall in person. That visit is worth accommodating, because an adjuster standing in front of crushed core rarely argues with a photograph of it. Between submission and approval the job sits. Shops do not perform unapproved work and then bill for it, and California requires authorization before added work begins, so a paused unit in the bay is the system operating correctly rather than a stall by the shop.

One supplement on a laminated body repair is normal. A second one happens when the first layer of repair exposes a second layer of damage, most often when a front cap comes off or a floor is opened. What should not happen is a supplement with no photographs behind it. Ask for the documentation package at the time it is submitted and keep your own copy. It is your claim file, and it is the same set of images the carrier is using to make a decision.

The Arithmetic on a Job That Grows

Here is a realistic version with numbers on it. The first estimate, written from photographs of a struck rear corner, runs about 4,200 dollars: roughly 20 hours of body and paint at 210 dollars per hour, plus a short parts line for trim and a corner molding. The owner authorizes teardown. The wall comes open and the damage extends six feet forward of the impact, through a stud, and into a window opening that will not seal again unless the frame is pulled and reset.

The rewritten scope carries 34 body hours and 14 paint hours, 48 hours total at 210 dollars, which is 10,080 dollars. Two hours of electrical at 260 dollars covers a chafed twelve volt run found in the cavity, adding 520 dollars. Parts follow the markup schedule: a laminate skin section and core at 780 dollars takes 35 percent because it is over 100 dollars and bills at 1,053 dollars, a window seal kit at 140 dollars bills at 189 dollars, and 95 dollars of clips and butyl doubles to 190 dollars.

Materials follow the hours. Paint supplies at 55 dollars times 14 paint hours is 770 dollars, body supplies at 5 dollars times 34 body hours is 170 dollars, and hazmat disposal is 45 dollars flat. Parts and materials together come to 2,417 dollars, and sales tax at 7.75 percent applies to that figure and not to labor, adding about 187 dollars. The job lands near 13,200 dollars. Nothing in there is padding. The first number described a corner and the second number describes a wall.

Deposits move with the job. A repair over 2,000 dollars takes 50 percent up front, so the original 4,200 dollar version carried about 2,100 dollars. Once the approved scope passes 10,000 dollars, an additional 25 percent comes due when the parts arrive, and any special order part carries a 100 percent deposit at the time it is ordered because it cannot be sent back. Card payments over 1,000 dollars carry a 3.5 percent surcharge, which on a job this size is worth knowing before you choose how to pay.

What the Owner Controls

Authorize teardown early. The longest delay on these jobs is usually the week spent debating a number that cannot be known until the wall is open. Teardown converts an argument into evidence. If part of the claim is later denied, or the unit turns out to be a total loss, the teardown work still produced the documentation that the valuation gets built on, so it is not wasted labor even in the outcome nobody was hoping for when the coach arrived.

Expect one supplement and treat it as routine rather than as a broken promise. Ask for photographs with every submission, keep your own copy of each package, and log the date it went to the carrier along with the name of the person who received it. When approval drags, that log is what turns a vague complaint into a specific question about a specific submission on a specific date, and specific questions are the ones that tend to get answered.

Understand that a growing estimate does not touch your deductible. It is set by your policy, applied once to the loss, and it does not scale with the repair total. What a larger number can change is whether the carrier begins comparing repair cost against the value of the unit, which is a separate conversation with its own math. Collision estimates at our shop carry no charge, insurance walk-ins are welcome, and you choose the repair facility. Steering to a preferred shop is not a requirement in California.