Vinyl Siding Warp
Vinyl Siding Warp probable causes - The most likely cause is that the vinyl siding was repainted with a darker color paint than the original color. Dark paint tends to absorb the heat of the sun, transferring it to the substrate. When vinyl siding expands dramatically, it is not able to contract to its original dimensions.
Vinyl Siding Warp solutions - Paint vinyl siding in a shade no darker than the original. Whites, off-whites, pastels, and other very light colors are good choices. Top-quality acrylic latex paint is the best type of paint to use on vinyl siding, because the superior flexibility of the paint film enables it to withstand the stress of expansion and contraction cycles caused by outdoor temperature changes.
Siding that has warped or buckled should be assessed by a siding or home repair contractor to determine the best remedy. The siding may have to be replaced.