Newer built RVs will have either EPDM rubber roofing material or TPO (thermoplastic olefin) roofing material.

EPDM roofing requires a semi-annual cleaning. (Some manufacturers suggest four times a year.) Use one of the following non-abrasive, non-bleach containing products: Spic-N-Span, Top Job, or RV rubber roof cleaners made by Dicor, Protect-all or B.E.S.T. products.

Along with semi-annual cleanings, you should also treat your rubber roof with a UV blocker that will aid in reducing the dreaded black streak/white chalking problems that occur with roofs that are not maintained properly.

Any resealing required on a EPDM rubber roof can only be accomplished with an approved EPDM sealant. These are available in either a self-leveling form (only use on flat surfaces), or non-leveling form made by Dicor. Do not use silicone or any other sealants not designed for EPDM. They will not adhere, and void any manufacturer’s warrantee.

There are a couple of complete roof coatings available for EPDM roofing, but in my past experience, I felt they did not perform well, or accomplish the results the customer was expecting. If you feel this is your only way out of an expensive total roof replacement, Dicor offers a roof renew kit ($570) that includes complete instructions and a five year warranty if applied correctly.

TPO roofing requires no semi-annual cleaning or treatment, but regular washing will aid in keeping the sides of your RV clean. Any sealants needed on these roofs also must be designated and formulated for EPDM and TPO materials.

Remember, all sealants are only as good as what’s under them. A rule of thumb is two applications, then it usually becomes necessary to remove prior caulking and start over with the correct type of sealant for your camper’s roof.

As always, we are here to answer any questions you have concerning the care of your RV. Next month, we’ll discuss basic propane safety. ‘Til then, keep it safe, keep it fun, keep it maintained.