Additionally consider cutting a larger hole beyond that of the vent hole so you have room to work on the vent and so you can see exactly what you re doing.
How to install kitchen stove vent thru the roof.
Connect the ductwork with sheet metal screws wrap the connections with aluminum faced duct tape then wrap the attic part of the duct work with an insulated sleeve.
The should cover the top of the vent flange.
Run duct work through the attic then attach the stove vent to a roof cap.
You can buy the proper flashing to install it on a flat roof and a roof cap that has screen around it to prevent insects from entering.
Install the vent and seal the underside of the vent flange with roofing grade sealant caulk.
To vent a range hood through a wall or roof you have to open up a hole in the ceiling using a drill machine.
Screw the ductwork together.
The lower part of the vent flange however will sit on top of the shingles.
Use roofing nails to nail the lower half of the flange in place at the corners.
Yes you can vent a range hood through the roof using a 6 single wall pipe.
Be sure to keep this larger piece and use it as a template in the next step.
Be sure to extend the pipe up at least 2 to 3 above the roof to prevent snow buildup from causing problems.
Leave the drill bit sticking through the roof so you can find the hole.
Cut the hole for the vent.
From up on the roof use a jigsaw or reciprocating saw to cut a 4 in.
Start in the attic and drill a hole through the roof in the desired vent location.
Try to keep it close to the fan location.
Apply asphalt roof cement to the bottom of the vent and slide in the vent under the shingles.
Connect the vent hood using screws and anchors to ensure a good tight fit.
This will also help you run an electric cable from the range hood over to the power box.
Seal between the top of the vent flange and at the bottom of the roofing shingles as well.
Caulk around the seams between the vent hood and the ceiling.
The holes are not just for the range hood but also drill one or two more holes for the electric wires too.