I'm thinking about putting isocyanurate board insulation on top of a flat
(low pitch) roof that slopes to a gutter . The old roofing would need to be
To get R20, the board would need to be about 2.5" thick and I am concerned
about the mounting height of the gutter. I was wondering if it is common to
put a treated wood edging (e.g. 2.5" high) against the edge of the
insulation and then covered by the roofing/drip edging?
This could support the gutter brackets quite a bit higher than could be done
with the current gutter board.
The building is bermed below grade so the gutter and edge of the roofing is
much lower and more visible than normal, and I'm trying to make the building
look better from this side.
Alternatively, maybe I should leave the gutter low, and just figure on
putting some kind of facade over the gutter?
Anyone know where I could find some example detailing of this kind of