what a very weird build-up....
Thanks, thats much better than I ever imagined ( shame about the rusted steel single glazed windows ! )
Its a one off house built in the late 40's. The polystyrene beads were pumped in at some stage in the 80s.
I wonder if the description '...9" solid block on edge...' is wrong ?
Its a block which when layed measures 18" long, 9" high, and a few inches front to back if that makes things any clearer
A really weird buildup is the roof :
Rafters, Chicken wire tacked on top, fiberglass on chicken wire, felt on fiberglass , concrete roof tiles.
Yes, the fiberglass is very squashed
I guess the gap between the rafters and lots of draughts ensures no condensation !
This is on a "one and a half" dormer.
Shouldnt the U value of this be very poor ?
Experience on frosty days shows frost stays on north side of roof all day ( except around dormers ). Beats me whats going on - what do you think ?
Olddog