Pacific northwest homeowner here.
Have lived in this home for 10 years, and our roof is approximately 20 yrs old. They are normal asphalt/composition shingles. The roof looks pretty good overall, IMHO. I am up there every week or two blowing off leaves/debris.
A few weeks ago, I noticed that what I would call “bubbles” are forming UNDER the shingles. We have a tri-level with a pitched roof and vaulted ceilings in certain areas, the bubbles are forming only over the vaulted ceiling of the living room, which faces northeast. (We do have another section of vaulted ceilings, but no bubbling over that section…)
One “bubble” is maybe one-and-a-half feet wide by six inches, one is maybe 6 inches by 6 inches. They are raised approximately 1.5 inches up from the rooftop beneath. If I step on them forcefully, they flatten out, then spring back up when I step off. It feels as though the plywood underneath is solid and has no give.
- What is causing this? Why is it happening now?
- I assume I need to repair it sooner than later? Is this something a handy homeowner could take on, or only a professional? If so, what would a rough cost estimate be?
- Or, would I need to get the who roof redone!?
(PS - I tried taking pictures, but it’s so subtle at this point - unless you’re walking on it - that the bubbles aren’t really very noticeable/visible in a pic…)