"CraigT" wrote in message
. ..
http://pics.bbzzdd.com/users/Squisher/IMG_6627.JPG


There are no heat sources behind that wall besides a toaster oven that
sits on the counter top and is seldom used. I would think any heat source
from inside would have caused some damage to the cabinet directly above.
This is new housing so the walls are insulated.

I haven't used any chemicals on the deck since the spring of '06.

Looks like a gas or charcoal grill sitting there did the nasty.