Patrick wrote:
Greetings,


Help! What's wrong with this roof? We are considering buying a house
that is 6 years old. We have through Monday to make our decision. The
house is in perfect condition.. except for the roof. There are no
leaks/moisture spots in the house. There are no leaks visible in the
attic.


PROBLEM: Quite a few shingles are slightly raised. Not buckled, or
warped, just raised slightly --at random-- primarily over the west side

of the roof. One area of the roof appears wavy. Almost all the aluminum

drip caps --where they overlay the other drip caps-- are raised by 1/4
inch. The drip cap ends are raised enough to start making inverted "v"
indentations in the shingles above them.
None of the other roofs in the same neighborhood --the houses were all
built at the same time-- have the same problem. All their shigles are
flat and their drip caps are not raised.


There is a bonus room built in the attic and I am wondering if there
isn't enough ventilation.


Thanks!

(Not the roof expert...)

You could be right about the ventilation issue.
This sounds like the roof deck (plywood?) is
de-laminating and buckling, perhaps from moisture.

If you really like the house, negotiate with the
seller after getting prices from reputable roofers.
Have the roofer include a means of remediating the
venting problem.

Jim