How to prove moisture damage to your motorhome, set deadlines correctly, and exceed the materiality threshold.
Moisture in the bodywork is the most common and costly defect in motorhomes. Those who react too late or document incorrectly risk losing their claims, even though the damage is obvious. Rogert & Ulbrich assesses whether a defect exists, secures evidence, and enforces cancellation of the contract or price reduction.
Why moisture in a motorhome is a problem in itself
A motorhome is not simply a car with a body attached, but rather a combination of a chassis and a living unit made of bonded sandwich panels. This construction relies on the watertightness of numerous joints: roof hatches, windows, service hatches, pipe penetrations, and seams between the walls, roof, and floor. Each of these points is a potential entry point for water.
This makes the defect legally significant. Moisture often only becomes apparent months or years after purchase, even though the cause existed from the beginning. Typical manifestations:
- Visible tracesDark discolorations at wall connections, waves or bulges in the interior cladding, detached decorative foils, mildew stains.
- OdorA musty smell after opening the door, which returns even after airing it out. This indicates moisture in the insulation.
- Soft spots: Sagging floors, especially in the area of the shower tray, entrance and rear garage.
- Consequential damagesCorrosion at fixings, mold growth, delamination of the sandwich panels, i.e. the separation of the layers.
- Hidden causesA leak in the roof can cause damage that only becomes apparent several meters away in the ground.
If you notice signs of dampness, don't wait until next season. The damage will worsen, and with each passing week, it will become more difficult to trace it back to the time of purchase.
Defect or wear and tear: classification according to § 434 BGB
A defect exists under § 434 of the German Civil Code (BGB) if the item does not meet the subjective, objective, or assembly requirements. For a motorhome, this means that the vehicle body must be watertight, even if this is not explicitly stipulated in the purchase contract. Watertightness is part of the usual quality that a buyer can expect.
The decisive factor is the point in time when the risk passes, which is usually the handover. The defect must have already existed at this point, even if only as an inherent flaw. Therefore, a faulty adhesive bond from the outset constitutes a defect at the time of handover, even if the water damage only occurs later.
The opposing side will typically raise these objections:
- Aging of the sealsSealants do indeed age. However, this does not mean that every instance of moisture damage constitutes wear and tear, especially not in a new or recently built vehicle.
- Lack of maintenanceIf the manufacturer requires regular leak tests, failure to do so can be used as an argument by the opposing party. However, it does not automatically lead to the loss of warranty rights if the cause lies in the design or workmanship.
- own faultThe causes claimed to be a stone chip, an impact, or improper modifications. Documenting the damage with an expert's report is helpful in this situation.
- Typical conditionThe objection that low humidity is normal in motorhomes does not hold water if the measured value and the damage pattern exceed what a buyer should expect.
Have the cause determined before discussing wear and tear. A faulty adhesive bond and an aged seal are legally two completely different matters.
Evidence: Leakage test, measurement and expert opinion
In cases of moisture damage, proof is the core of the process. The crucial factor is not the presence of moisture, but rather that its cause can be proven and linked to the time of handover.
In practice, solid evidence is built up as follows:
- Leakage testA test performed in a specialist workshop with a written report. The moisture content is measured at defined measuring points. The interpretation of the measured values depends on the specifications of the respective manufacturer, which is why the report should specify the measuring points and the underlying specifications.
- Photo documentation: Photographs of the damage sites with a recognizable date, supplemented by overview photographs for localization.
- Expert opinionAn expert report on the cause is the key piece of evidence. It should specify the point of entry, the cause, the age of the damage, and the estimated repair costs. The latter are crucial for determining the materiality threshold.
- history: Service booklet, maintenance records, previous leak tests and all workshop invoices.
- Preliminary correspondenceAdvertisement, sales conversation and written assurances regarding the condition of the vehicle.
When purchasing consumer goods, a rule regarding the burden of proof also helps you. If a defect appears within one year of delivery, it is presumed under § 477 of the German Civil Code (BGB) that it was already present at the time of delivery. After this period, the burden of proof lies with you, which makes an expert opinion practically indispensable.
Commission an expert opinion only after legal consultation, so that the assignment asks the right questions and the costs remain reimbursable.
Setting a deadline for subsequent performance and when it is unnecessary
In principle, withdrawal from a contract requires that you have previously given the seller a reasonable period for subsequent performance in accordance with Section 439 of the German Civil Code (BGB). This sequence is frequently skipped in practice, which renders the withdrawal ineffective.
Here's how to set a reliable deadline:
- Specifically identify the deficiencyDescribe the appearance and location, not just the word "moisture". If the cause is known, state it.
- demand subsequent performanceDemand that the defect be remedied without specifying a particular method. The choice between repair and replacement is yours, not the seller's.
- Specify a reasonable deadlineA specific date is better than a week. The appropriateness depends on the effort involved; more time should be allowed for construction work than for sealing.
- Verifiable deliveryIn writing and with proof of receipt, not by telephone.
Setting a deadline is unnecessary in exceptional cases, such as a serious and definitive refusal to provide subsequent performance or if subsequent performance has failed. In the case of an insolvent retailer who can neither repair nor replace the goods, impossibility of performance is likely. This should be documented and explained to the other party.
Only declare your withdrawal from the contract once the deadline has been properly set or can be proven to have been unnecessary. You can find further articles on vehicle defects in our section. Automotive.
Materiality threshold, limitation period and exclusion of warranty
Three formal hurdles will determine whether the resignation ultimately succeeds.
- SignificanceAccording to Section 323 Paragraph 5 Sentence 2 of the German Civil Code (BGB), rescission of the contract is excluded in the case of an insignificant breach of duty. Case law bases this on the ratio of the costs of remedying the defect to the purchase price. In the case of moisture damage and structural damage to a motorhome, this threshold is regularly exceeded because work on sandwich panels is complex. This is quantified in the expert report.
- statute of limitationsClaims for defects expire two years after delivery, according to Section 438 Paragraph 1 No. 3 of the German Civil Code (BGB). When purchasing used vehicles, this period can be reduced to one year for consumers under the conditions of Section 476 Paragraph 2 of the BGB, but only by express and separate agreement. In cases of fraudulent concealment, the standard limitation period applies according to Section 438 Paragraph 3 of the BGB.
- Warranty disclaimerA complete exclusion of warranty is not legally valid when purchasing from a retailer in relation to consumers. While it is generally possible in private sales, it is not applicable under § 444 of the German Civil Code (BGB) if the seller is responsible for the defect. fraudulently concealed or has provided a warranty. This should be checked, especially in cases of known moisture damage.
In addition, there is the compensation for use. According to § 346 of the German Civil Code (BGB), in the event of cancellation, the benefits derived from the vehicle must be returned, for which, in the case of motorhomes, the mileage is not necessarily the determining factor. This significantly alters the financial outcome and should be calculated before declaring cancellation.
Have the materiality, statute of limitations, and compensation for use assessed together before making a decision. We have discussed experiences with disputes over defects in dealer purchases in the article. Buying a used car from a dealer compiled.
Warranty, leakproof guarantee and the role of the manufacturer
In addition to your statutory rights against the seller, motorhomes often come with a separate manufacturer's warranty, frequently referred to as a water tightness warranty, lasting several years. This warranty is an independent performance promise and not a statutory guarantee. It exists alongside your statutory rights but does not replace them.
It is practically important for two reasons. Firstly, it is directed against the manufacturer, who remains reachable even if the retailer is insolvent. Secondly, it has its own requirements that must be met.
- Inspection intervalsWarranty conditions regularly require proof of leak tests at specific intervals. If this proof is missing, the warranty may be void.
- ScopeWarranties often only cover the watertightness of the structure, not consequential damage to furniture and equipment. The specific terms and conditions define this distinction.
- Reporting obligationsDamages often have to be reported within certain time limits and in a prescribed manner.
- Relationship to the warrantyA warranty claim does not exclude your statutory rights against the seller. Both can be pursued simultaneously.
Please submit the warranty terms and conditions along with the purchase agreement for review, as these terms are crucial. We will address any questions regarding claims processing through insurers in the relevant section. Insurance law.
Rogert & Ulbrich – Your lawyers for moisture damage to motorhomes
Rogert & Ulbrich represents consumers nationwide in matters of sales law and vehicle defects. Attorneys Dr. Marco Rogert and Tobias Ulbrich and their team are familiar with the body construction of motorhome manufacturers, the argumentation patterns of dealers and manufacturers, and the requirements that courts place on proof in cases of moisture damage.
We examine whether a defect exists, structure the evidence gathering process through leak tests and expert reports, and set a legally sound deadline for rectification. We assess the materiality of the defect, the statute of limitations, and compensation for use before you declare your withdrawal from the contract, and simultaneously pursue warranty claims against the manufacturer. If an out-of-court settlement cannot be reached, we will also represent you in court proceedings.
Is your motorhome showing signs of dampness and the dealer is blaming it on wear and tear? Contact us for a free consultation and have your claims reviewed before deadlines expire.
