Sprayed in place polyurethane foam (SPF) is a closed-cell roofing material formed by combining two liquid components. When these two materials meet in the mixing gun, they expand 20 to 30 times their volume immediately, forming rigid polyurethane foam. This foam is sprayed on the entire roof to the desired thickness, usually 1-2 inches, to form a seamless monolithic surface including flashing, penetrations and parapet walls. This eliminates seams and cold joints, the primary source of major leaks, and provides a durable waterproof covering that bonds tightly to nearly any properly prepared surface.
SPF serves as insulation with an R-value of 7 per inch as well as creates a water tight roof. It is very important to install a top quality elastomeric rubberized roof coating over the SPF to protect it from the elements. M.E.B. Systems recommends installing Conklin Rapid Roof III®, Benchmark®, or PUMA XL® as per Mfg Specifications. SPF roofs must be maintained by re-coating periodically. The frequency of re-coating depends on the quality of the coating installed over the SPF. An SPF roof coated with a high quality product such as Conklin's PUMA XL®, will perform for 18 years before a re-coat is required. M.E.B. Systems Inc, offers SPF roofing if we feel it will meet the customers needs. It is not suitable for high traffic areas or roofs where good drainage is not possible.