What\'s up with this roof?
A picture is worth a thousand words. /w3tcompact/icons/smile.gif (View the attached photo to see what I mean.)
This has developed on my roof over the past couple of years... started as just a small line of shingles being lifted and has progressed to what you see in the photo now. Front of the house doesn't have this problem, just the rear.
I'm not the original owner and hence, don't know for sure what was done originally, but it's a multi-layer roof. The original building plans that I have don't indicate what the plywood was fastened to originally. I understand the shingles were replaced about 7-10 years ago (house is 27 years old).
The roof above the garage that I can gain access to from the inside (stick built) does show that the plywood wasn't staggered, since the seams are lined up. No such problem on that side, but the plywood is fastened to rafters directly.
Seems to me that based on what I can see, the plywood is curling underneath the shingles, since the spots are about 8' apart... it's also easy to assume that the plywood wasn't staggered on this main portion of the house either, because of the way the shingles are lifting.
Anyone have an idea as to what's happening, and why?
Thanks in advance for any thoughts.
A picture is worth a thousand words. /w3tcompact/icons/smile.gif (View the attached photo to see what I mean.)
This has developed on my roof over the past couple of years... started as just a small line of shingles being lifted and has progressed to what you see in the photo now. Front of the house doesn't have this problem, just the rear.
I'm not the original owner and hence, don't know for sure what was done originally, but it's a multi-layer roof. The original building plans that I have don't indicate what the plywood was fastened to originally. I understand the shingles were replaced about 7-10 years ago (house is 27 years old).
The roof above the garage that I can gain access to from the inside (stick built) does show that the plywood wasn't staggered, since the seams are lined up. No such problem on that side, but the plywood is fastened to rafters directly.
Seems to me that based on what I can see, the plywood is curling underneath the shingles, since the spots are about 8' apart... it's also easy to assume that the plywood wasn't staggered on this main portion of the house either, because of the way the shingles are lifting.
Anyone have an idea as to what's happening, and why?
Thanks in advance for any thoughts.