What causes vinyl siding to bubble?
In respect to this, why is siding bubbling?
Bubbling or Blistered Siding Bubbling and blistering can happen when siding is exposed to extreme amounts of moisture or heat. You can replace only the affected areas of the siding with new panels.
Keeping this in view, why do nails pop out of siding?
There are a few reasons why nails pop out of siding: Expansion and contraction of the wood; Fill the old nail holes with wood filler. If wood soaks up moisture and then dries out, it can warp or move.
Some paints, in particular those containing urethane, work great on vinyl siding as long as you choose an exterior paint color that's lighter than the color of the vinyl siding itself to prevent flaking paint and warping vinyl. But if you have your heart set on a darker color, you're in luck.