08/18/2026
We get a lot of questions about the “spray on roofs” and what our opinion is on them. First thing we say is; If it was that good of a product, they would put them on in the factory, but they don’t. So, you must ask yourself “why?”.
Some that have gotten it done have frequently reported drawbacks regarding high-cost repairs and application flaws, this includes two of our customers, and one is seeking an attorney over his application. So, let’s dive in……
Spraying a thick, permanent layer over moldings, skylights, and vents makes routine part replacements or repairs labor-intensive.
When underlying moldings or side trims shrink or get damaged over time, cutting through or working around the hardened monolithic coating is extremely difficult and will cost more in a repair than a normal roof. Additionally, as the body and front cap flex, the screws could become loose, back out and fail. When this happens, the screw cover molding will need to be removed to tighten, thus again causing damage to the roof coating. Need to replace your rain gutters? Forget it. Back wall needs work? What a nightmare cutting that roof off your moldings and back wall.
Inexperienced or sloppy applicators can fail to bond the material properly to fiberglass end caps or metal components, leading to edge lifting (happens often). Spraying a heavy layer over soft spots, sagging vacuum-bonded roofs, or wet wood without fixing the structural substrate first can compound leaks rather than fix them.
The main reason we believe they don’t do these roofs in the factory is because of the weight it adds; Half a pound per square foot minimum! Some people may not think that’s a lot of weight, but it is when it’s on your roof.
Finally, let’s talk about the cracks these roofs are now experiencing after traveling. An RV going down the road is equivalent to an 8.0 earthquake. The shaking, bouncing, twisting, etc., it goes through has been causing cracks in the hardened roof. Again, this no longer gives you the leak proof you were promised.
If you are a high mileage traveler, skip the trend and go with an RV roof you can trust.
A few picture examples of a water leak - First picture is water trapped under the spray on roof from the AC, which rotted the wood underneath. The second picture is how much they continued to spray on to try and fix the problem before the roof had to be cut off.