A little research turned up WeatherBond 110 (WeatherBond Pro, P.O. Box 2022, Mechanicsburg, PA 17055; 800/575-4406), a 45-mil, black EPDM rubber roofing membrane backed with 20-mil butyl adhesive. Designed for smaller roofing jobs, it comes in 4x25-foot rolls that cover one square each. It has a peel-and-stick release liner, slit lengthwise at 4 and 24 inches from one edge to facilitate installation. Single-ply EPDM rubber roofing has many advantages over other roofing options. It remains flexible at extreme temperatures, can be installed quickly, and resists deterioration from exposure to ultraviolet radiation -- a protective coating, like natural stone, is not required as with some torch-down products. Expensive option. The rubber membrane is expensive. The cost, including the EPDM roll, cover strip, primer glue, and sealant is about $160 per square. And you need to figure in some extra for corner covers and pipe boots. But the installation cost fares pretty well compared to a torch-down product, considering the labor and expense of installing a UV coating over the torch-down. The WeatherBond 110 membrane is also available in solid white rubber, but it costs about 16 percent more than the black rubber. White reflects most of the sun's infrared rays, which helps to keep the roof and the space below cool in warmer climates. Currently, the same black cover strips must be used with the white rubber membrane. It's possible to paint the black cover strips, using acrylic latex or oil-based paint but successive coats of paint may be necessary to prevent bleed-through. However, the company plans to have a white cover strip available this fall. Warranty. The 12-year WeatherBond warranty is, to date, the best I've found in the category of residential low-slope roofing products. And, if the performance of single-ply EPDM roofing on commercial installations is any measure, WeatherBond 110 can certainly last much longer than 12 years, if it's properly installed. Granted, the product was a little hard to find for this job. It was available at only one roofing supplier in my area. WeatherBond's area rep assured me that the company is encouraging lumber retailers to stock their product, so its availability may improve. Temperature range. WeatherBond 110 is best installed at temperatures ranging between 40F and 80F. However, there is some latitude. If it's 35F, but it's sunny on the deck, the material may be workable enough. The same holds true if it's 85F but cloudy. The glue on the product gets very aggressive in high temperatures, and special techniques must be used to install it (see "Helpful Hints," below). The manufacturer provides an installation video and instruction booklet, on request, that clearly illustrate these and other procedures.

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