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Barbecue grills and other outdoor cookers cause specific localized damage to vinyl siding:
When placed too close to a wall it's easy for a hot barbecue grill or similar cooker to damage the building siding and if you don't watch out it's possible to set the building on fire.
Beginning here in an article series on vinyl siding buckling we discuss all of the know causes of this defect. Watch out: rippled or loose vinyl siding may be more than just a cosmetic worry, and may indicate structural defects, building movement, leaks, or even heat or fire hazards. Our page top photo shows wrinkled vinyl siding - often caused by heat exposure but in this case the extent, location, pattern and size of the damage made us suspect that there was another cause, as we explain below.
Buckled or Sagged or Rippled Vinyl Siding due to Point-Source Heat Damage - Barbecue Grille or or Heat Source
[Click to enlarge any image]
As we mention also at VINYL SIDING INSTALLATION, heat damaged siding (shown in our photos below) is not a vinyl siding product defect and needs to be distinguished from siding that has buckled from heat from the sun combined with improper nailing.
Heat damaged siding caused by a specific point-source such as a hot barbecue grille or cooker looks like the examples we show in our photographs on this page. We think that it's common to heat up the barbecue grille, then flip up the top and cook-away without noticing that the hot top is closer than ever to the vinyl siding on the building nearby. Home inspectors and other building professionals have come across this particular damage rather often - at least among those working in parts of the world where owners of vinyl-sided homes like to cook outdoors.
What was tricky before these grilled siding cases became more widely known, was the encounter of this damage when the guilty party have left town, taking their cooker along with them. The isolated buckled siding or rippled vinyl was for a time mysterious.
Above: a specific and limited area of sagging rippled vinyl caused by a local heat source, almost certainly a cooker.
Watch out: we sometimes find badly buckled or even burned vinyl building siding where someone placed a barbecue grill too close to the exterior wall (photo above left). And on rare occasions we've found siding that was buckled as if by this problem, but in a location where we couldn't imagine a barbecue taking place (photos below ascribed to unknown conditions, possibly heat leaks).
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Bob Fankhauser <firstname.lastname@example.org>, 503 206 9824 Cell, a retired engineer / professional handyman and Habitat for Humanity volunteer who offered comments, suggestions, additions for vinyl CLTE (Coefficient of Linear Thermal Expansion), CPVC, PVC, cellular PVC, and vinyl (25 Feb 20-16) as well as helpful discussion concerning the wide variation in coefficients of expansion of materials given by various sources.
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