On Sep 22, 12:20*pm, TomYoung wrote:
Hi all:

I'm insulating a flat roof from inside the house, using faced
fiberglass batts.

There's 3 or 4 places in the roof where insulated electrical wiring
(14/2 w/ground) is run across the joists and I'm unsure as to proper
procedure in these spots. *Is it OK to cut the batts in a way that I
can fit them into the spaces such that the insulation completely
surrounds the wire?

TIA.

Tom Young

The roof joists on this flat roof seem to have been ripped to a 9"
width. Previous insulation was 4" batts, leaving a large air gap
between insulation and roof deck. The roof has a continuous vent
around the eves, so there should be plenty of air flow up there.

The batts I bought are listed at 9 1/2" thick, so they completely fill
the joist cavity, ceiling to roof. Is this acceptable? If not, can I
simply remove an inch or so of the batt's thickness, creating a 1" -
2" airspace?

If the answer to my question is "Yes", is there any easy way to reduce
the batt's thickness, other than just snipping away with scissors?

TIA, again.

Tom Young