How can I find out why the paint by my skylight peeled?

by Sandi

What would cause paint to peel in a skylight window “ well”? Can’t see signs of water leaks on the wall. It’s just the side walls.

Looking up at skylight.

Painted 2 years ago. Narrow end walls of skylight well have no peeling.

  9 answers
  • Ohiorn Ohiorn on Sep 01, 2018

    Check the skylight itself for leaks, which may be small or may be just part of a seal.

  • Ella Frierson Bond Ella Frierson Bond on Sep 01, 2018

    I would be on moisture.

  • Rebecca Taylor Rebecca Taylor on Sep 01, 2018

    Hello, Most likely condensation on the walls. There isn't proper ventilation, that's my guess. I doubt the skylight is sealed correctly.

  • Frances Arlene Frances Arlene on Sep 02, 2018

    could be heat, or latex paint over oil base paint.crape it off and use a good primer then repaint.

  • 1401470 1401470 on Sep 02, 2018

    Probably it was lack of prep work from time of application. Was the surface clean, was there a primer and so on?

  • S S on Sep 02, 2018

    take a chip(s) of the peeling paint (large as you can get) to a paint store (big box not recommended) . the experts there should be able to examine it and tell you with 90+% certainty why the paint peeled and how to solve the problem. it is difficult to tell from your photo but it does not appear to be moisture.

  • Jlnatty Jlnatty on Sep 02, 2018

    Do you still have the paint can from the paint you used 2 years ago for the skylight well? If so, check whether it was latex based paint or oil based (alkyd) paint. If it's oil based paint and the underlying coat of paint was latex, the oil based paint will fail and peel off. If you're sure there is no leakage from the skylight (have you checked the walls for moisture) then scrape off the paint, sand smooth, prime with Kilz and repaint with a marine (outdoor) paint or a moisture resistant latex paint like the kind used to apply to damp basement walls. You can apply latex paint over oil (alkyd) paint, but not the other way around.

  • Sherri Sherri on Sep 02, 2018

    Could it be changes in temperature? I'd see how it is insulated if it isn't the paint and prep. Good luck.