As part of my kitchen remodel, I'd like to go ahead and vent my OTR microwave outside. It is not an exterior wall, so I will being going straight up, or as straight as I can go depending on rafter locations. The kitchen has a sloped ceiling with no attic above it, so I'm hoping I'll just need to go straight though drywall/insulation/roofing. I know generally how to do it, and I've done some Google research on the process, but I'd like to ask a few things before I start. First is supplies, which I will go ahead an pick up; I'd like to do this on the coming weekend. I believe I'll need a standard aluminum roof vent, 6" round ductwork, some length of 3.25"x10" to attach to the OTR, and a transition piece. Luckily, I did save the piece that came with the OTR that I'll need. The cabinet above the microwave is 30"x15"x30", but because the ceiling is sloped, it does not reach the ceiling. I plan on using the transition inside the cabinet, and then going out of the top of the cabinet with 6". I may need a couple 90 degree elbows to avoid a rafter. Then through the ceiling/roof and into the roof vent.
So, I'm thinking I need: applicable duct work, roof cap, and I assume roofing tar. The roof is asphalt shingle.
For the process, I'm thinking I locate the spot I'd like to go through the ceiling, remove a small cutout of drywall to ensure there's nothing in my way (electrical, etc.). Drill straight through the roof with a small bit. Get on the roof and cutout a 6" hole. slide the 6" duct through the roof and into the kitchen. Install roof vent per manufacturer instructions, using roofing tar to make it water tight. Then it's just a matter of running duct work inside and connecting to the OTR. I'm not sure how or if I'll hide the ductwork. The cabinets will be semi-custom. They're frameless, so I'm making all the fronts, end panels, and some shelving and odd sized cabinetry. I could enclose what's visible in matching wood, but I guess I can make that decision when I see what it looks like. I know it'll be difficult to have a clean exit where the duct goes through the drywall ceiling.
Any comments or suggestions are appreciated. I just need the confidence that I'm doing it right before I start cutting a hole in my roof.
So, I'm thinking I need: applicable duct work, roof cap, and I assume roofing tar. The roof is asphalt shingle.
For the process, I'm thinking I locate the spot I'd like to go through the ceiling, remove a small cutout of drywall to ensure there's nothing in my way (electrical, etc.). Drill straight through the roof with a small bit. Get on the roof and cutout a 6" hole. slide the 6" duct through the roof and into the kitchen. Install roof vent per manufacturer instructions, using roofing tar to make it water tight. Then it's just a matter of running duct work inside and connecting to the OTR. I'm not sure how or if I'll hide the ductwork. The cabinets will be semi-custom. They're frameless, so I'm making all the fronts, end panels, and some shelving and odd sized cabinetry. I could enclose what's visible in matching wood, but I guess I can make that decision when I see what it looks like. I know it'll be difficult to have a clean exit where the duct goes through the drywall ceiling.
Any comments or suggestions are appreciated. I just need the confidence that I'm doing it right before I start cutting a hole in my roof.