Summer is perfect for BBQ grills, but vinyl siding is not. Vinyl siding is made from organic materials and can melt when exposed to a significant heat source. Therefore, an outdoor BBQ should be placed a minimum of three feet from any vinyl-sided wall.
I recall occasions that a homeowner would phone in about a warranty claim for their vinyl siding warping. Upon inspection, noting that the severely warped area was approximately 3′ wide and 2′ high and 4′ above the deck and patio, it is clear that the cause was a hot BBQ placed too close.
Many times homeowners will pull mobile grills away from a wall to cook, but then move back when done, but the unlit, but still very hot grill can cause similar damage quickly. Recommended is at least 6′ of clearance as measured when the grill top is fully open.
Replacing the ruined section of siding is possible, but not an overly simple task. A siding removal tool, nick named a “zipper” is required to unhook and the re-hook the new panel interlocks. Also, due to weathering, color lots, and discontinued material, matching and blending in may prove difficult.
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Enjoy your outdoor cooking and entertaining, but please be safe and aware while doing so.