SDmark
Member
Hi,
I live in a 1953 San Diego home on a slab foundation with lovely open-beam 2x8 tongue-and-groove ceilings.
The low-slope roof was rock and tar, then in 1991, they got rid of the rocks and added a hot-mop tar layer. I'm about to have both layers scraped off, add 3" of PolyISO rigid foam insulation, 7/16" plywood as a new base, then a torch-down or possibly TPO roof.
There are two hanging lamps in the kitchen fed directly through the beams that must have wires running above the ceiling and below the roofing, perhaps grooved above the beam. Plus given this once-in-two-decades opportunity, I'm thinking of adding a circuit or two to the master bedroom for possible electric heat and air conditioning.
The question is, what is the right way to run electrical wiring above a ceiling, below roofing, in particular when there will be the extra weight of insulation lying on it? Just lay Romex flat on the ceiling and slap the insulation on top? Groove the wood? Use metal-clad BX?
For the new circuits, if I just want empty conduit for future use, is PVC the best? I'd have to check with the roofer, but maybe it would be possible to groove the bottom of the insulation to accommodate a conduit run.
Thanks for your thoughts,
Mark
I live in a 1953 San Diego home on a slab foundation with lovely open-beam 2x8 tongue-and-groove ceilings.
The low-slope roof was rock and tar, then in 1991, they got rid of the rocks and added a hot-mop tar layer. I'm about to have both layers scraped off, add 3" of PolyISO rigid foam insulation, 7/16" plywood as a new base, then a torch-down or possibly TPO roof.
There are two hanging lamps in the kitchen fed directly through the beams that must have wires running above the ceiling and below the roofing, perhaps grooved above the beam. Plus given this once-in-two-decades opportunity, I'm thinking of adding a circuit or two to the master bedroom for possible electric heat and air conditioning.
The question is, what is the right way to run electrical wiring above a ceiling, below roofing, in particular when there will be the extra weight of insulation lying on it? Just lay Romex flat on the ceiling and slap the insulation on top? Groove the wood? Use metal-clad BX?
For the new circuits, if I just want empty conduit for future use, is PVC the best? I'd have to check with the roofer, but maybe it would be possible to groove the bottom of the insulation to accommodate a conduit run.
Thanks for your thoughts,
Mark