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A musty smell or a dark stain in a corner cupboard of your Challenger rarely points to a fresh leak.

A musty smell or a dark stain in a corner cupboard of your Challenger rarely points to a fresh leak, but usually to damp that has been seeping into the wall or roof for weeks to months. Have a professional moisture reading done to find the extent and the source. On Challenger models, the sealant seams around roof hatches, roof edges, and the corners of the body are especially prone to hairline cracks. Depending on the severity, a local repair may be possible, but if damp has penetrated the furniture or floor, selling to a buyer is often financially more attractive than expensive remediation.
Challenger motorhomes are known for their sturdy polyester roof and aluminium sandwich walls, but no brand escapes ageing sealant seams. Especially after five to seven years without periodic maintenance, micro-cracks in the sealant can let water through that only becomes visible once the damage is already present. The sooner you have a moisture reading taken, the lower the repair costs and the greater the chance you can keep the motorhome without heavy loss of value.
Water damage in a Challenger often starts innocently: a small damp patch near a window, a musty smell or discolouration on the ceiling. But moisture spreads quickly and can seriously affect the wooden structure of your motorhome. That is why a quick diagnosis is crucial.
Challenger motorhomes have a number of typical points of attention when it comes to watertightness:
A thorough explanation about motorhome roof leaks and moisture damage can be found in our knowledge base. There you can read how to carry out a first check yourself and when to call in a professional.
A moisture measurement with a professional meter will give clarity about the extent of the problem. A specialist can also look into hollow spaces with an endoscope. Based on that, you will know whether it is a local leak or structural damage. Bear in mind that the visible damage is often smaller than the actual extent: moisture penetrates wood and insulation and may only become visible after months.
A small leak around a roof hatch or window rubber can often still be repaired easily. But if moisture has already got into the walls or roof, costs can quickly escalate. For a professional repair of a larger leak, you can easily expect to pay several thousand euros, depending on the extent and the hourly rate. Moreover, after a repair there is always a risk of hidden damage or new leaks.
If the repair costs are no longer proportionate to the value of your Challenger, selling is a sensible choice. A motorhome with water damage loses a lot of market value. Buyers are wary of moisture problems, and rightly so. By selling your Challenger in its current condition, you avoid high repair costs and months of hassle.
Frequently asked questions
Have your Challenger valued for free and discover what it is still worth in its current condition. We buy motorhomes with water damage, without obligation.