How To Do An RV Roof Leak Repair That Will Last And Won’t Cost A Fortune For many people who own an RV and enjoy RV camping trips, their vehicle is their pride and joy. You love the feeling of packing everything in and hitting the road and you want to make sure your RV stays in good condition.We’ll outline common causes of roof leaks, their sources, average repair costs for a 10 ft. x 10 ft. area, and more in our roof repair cost breakdown. common roof leak Causes The average cost for a professional roof repair is $630, but it varies depending on a number of factors, including the cause of the leak, the roofing material, and more.RV roof repair is a bit of an anomoly in terms of how it is typically approached. What I mean by that is often times the last thing people think about when maintaining their RV is the roof, despite the fact that the roof is one of the most exposed areas on your vehicle.When the vinyl or metal flashing that seals the edge of a skylight to the roofing material tears or is pulled away from the skylight, a leak will appear and costs $300-$500 to repair. Valley roof flashing, which is used anywhere on a roof where slopes create a valley where water drains off, runs $15-$25 per linear foot to repair.Average cost to repair a roof is about $650 (patch moderate leak repair replacing 100 sq.ft. of asphalt roof and resealing it). Find here detailed information about repair roof costs.However, for homes that experience extensive leaking to the point where their roof is failing to keep out water and is evidently damaged beyond repair, replacing the entire roof might be necessary. In these situations, re-roofing will be a better long-term investment than continual repairs to the existing roof.According to RoofingCalc, the average cost most consumers reported paying for a roof repair was between $350 to $1,000, or about $675 for a typical roof repair project. As expected, some repairs can cost much lower than the average, requiring only a simple application of caulk or roof cement to seal the source of a leak.