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Maintenance ProceduresExperience has shown that when a polyurethane foam roofing system has been properly selected and installed, the maintenance required under normal circumstances is minor and simple to perform. Also, there is no doubt that a regular inspection and maintenance program that serves to correct minor defects or damage as it occurs can extend the life of the roof. There are now many polyurethane foam roofs approaching 25 years in age that have been properly maintained and are leak-free. Many of these roofs are Silicone / SPF and Acrylic / SPF roof systems. It is important to note that maintenance procedures of any type should be conducted using materials that are similar and compatible with those materials involved in the polyurethane foam roofing system being serviced. The greatest concern deals with caulk sealants and the particular elastomeric protective coating. However, any foam repairs needed should be made with a foam of proper density and fire rating classification. Except in the case of temporary, emergency repairs, the use of asphaltic, bitumen or coal tar mastics and plastic patching materials should be avoided.
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For purposes of this guide, maintenance procedures are divided into three types, as follows: Type I – Minor Repairs - This type of repair is normally conducted during routine or annual inspections or if a small deviation is discovered or caused during roof equipment servicing activities. Type I repairs should be limited to those that do not require use of foam materials. This type of repair can be effected with the use of manufacturer approved building sealant or roof coating and granules, if used originally. The deviations in this category are small cuts, fractures, punctures, penetrations, cracks, gouges, blisters and scuffs limited to 3 inches in diameter. Length varies and does not impose a restriction for this type of repair. Depth may also vary. Type II – Moderate Repairs - On occasion, an inspection will reveal isolated areas of poor quality foam, wet foam, foam blisters, foam delamination or mechanically damaged areas that are too large to be treated as Type I repairs and cannot be corrected by caulking or re-coating. Such areas require removal and replacement of foam and coating. If these areas are limited and not larger than 2 square feet in size, they can be easily repaired. Type III – Major Repairs - In most cases, major repairs, which include extensive foam replacement and recoating work, should not be attempted as a part of maintenance procedures. Rather, an approved applicator, who has proper equipment and skills, should be employed. In terms of long-term preventative maintenance, a properly installed and maintained SPF Roof System normally will not need recoating for more than 10 years.
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| Home • Sprayed Polyurethane Foam • Roof Preservation • Waterproofing • Seamless Flooring • Maintenance • Case Histories • Contact Us |
| 8620 East Oak Street, Mesa Arizona 85207 Office (480)894-9858 • (800)437-5157 • Fax (480)838-0821 (c) Copyright 2001-2006 DAS Products |