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VINYL SIDING DISTORTION LTR CITY OF SALEM, MASSACHUSETTS BUILDING DEPARTMENT , rY' 120 WASHINGTON STREET,3m FLOOR TEL. (978) 745-9595 KIM 3ERLEY DRISCOLL FAX(978) 740-9846 MAYOR THomAs ST.PIERRE DIRECTOR OF PUBLIC PROPERTY/BUILDING COMMISSIONER October 26,2018 Steve and Delinda DellOrfano 62 Moffat Road Salem Ma. 01970 Re:Vinyl Siding Distortion Dear Owners, Enclosed, please find a copy of an article regarding vinyl siding distortion. In the City of Salem this is a fairly common occurrence due to homes being so close to each other. The distortion is usually caused by the sun's rays reflecting off of an abutters window. The usual fix is a full screen being added to the abutters windows. It should be noted that this distortion occurs only under specific conditions having to do with homes orientation to the sun and the proximity of an abutters home. A search of the internet will reveal many more articles about this problem . If you have any questions,please let me know. Since ly, Thomas St.Pierre w• uarainai 1 G -tech ical Company Bulletin #IG15 - 07/04 Vinyl siding Distortion & this temperature is reached the siding may distort. The February 2002 Vinyl Siding Institute memo also indicates Glass Reflections that roofing and pavement reflections can also cause the potential for vinyl distortion. In the Vinyl Siding Institute statement, they recommend that damaged vinyl siding There have been reported instances where solar reflection panels be replaced and homeowners take preventative off of glass products or other materials adjacent to homes measures to eliminate a reoccurrence. Some examples has caused distortion in vinyl siding panels. There are of preventative measures listed include: many variables that can affect the temperatures received from glass reflections and the potential damage caused Install outdoor screens in windows which appear to by this heat build-up to vinyl siding panels. These vari- cause a heat build-up higher than the heat distortion ables include but are not limited to: temperature of the vinyl siding an • Angle of the sun in relation to the window solaarlreflect oning over the window to break the line of installation Use shrubbery to protect area of vinyl siding from solar • Orientation of the window in relation to the sun and reflections or radiation the vinyl siding panel • Outdoor temperature and wind speed A copy of Vinyl Siding Institute's Thermal Distortion State- • Distance of glass to vinyl siding panels ment is attached. • Color of vinyl siding panels • Heat distortion temperature of the vinyl siding The information in this Technical Service Bulletin is subject to the panel disclaimers and other limitations appearing in the DISCLAIMER that • Deflection of the glass accompanies this Bulletin and at www.cardinalcorp.com. • Solar reflectivity of the glass ©Copyright 2004 Cardinal IG Company The Vinyl Siding Institute, in February 2002, issued a state- ment indicating that the typical heat distortion tempera- ture of vinyl siding is between 160°F to 165°F Once V51 Thermal Distortion Statement February 2002 The Vinyl Siding Institute(\/Sl)is aware of rare incidents of thermal distortion of vinyl siding due to reflected light or radiated heat. In such incidents, reflected or radiated heat from various sources combines with ambient tempera- ture and sunlight, to cause visible distortion of vinyl siding panels. The typical heat distortion temperature of rigid vinyl(PVC)siding is 160-165°F. Once this temperature is reached, the siding may distort. While excessive heat buildup leading to thermal distortion cannot always be predicted, being aware of the factors that contribute to it may help to avoid it. Reflected or radiated heat sources have been reported to include windows, glass doors, roofing, and pavement. These sources combined with architectural characteristics such as alcoves that block breezes, overhangs that trap convected heat and inside corners that capture window reflections can result in thermal distortion. Thermal distortion will usually reoccur in the same location unless preventive measures are taken. The VSI recom- mends that damaged siding panels be replaced and that homeowners be advised to take preventive measures to eliminate reoccurrence. Some examples of preventative measures are the following: • Install screen in window causing the problem • Install an awning over the window to break line of light reflection • Use shrubbery to protect area of siding from reflections or radiation Bulletin #IG15 07/04 Page 1 of 1 i