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.
Installing a range hood vent through the roof.
Leave the drill bit sticking through the roof so you can find the hole.
Installing a range hood vent through the ceiling is also called venting vertically and this is the method we recommend.
Try to keep it close to the fan location.
Ensure that the spots you mark out on the ceiling are precise.
The trickiest part of installing a range hood is determining how to run the ventilation ducts.
Depending on the location of your range you will need to decide if it is easier to vent through an outside wall versus up through the roof.
Be sure to extend the pipe up at least 2 to 3 above the roof to prevent snow buildup from causing problems.
Apply asphalt roof cement to the bottom of the vent and slide in the vent under the shingles.
You should start by drilling a hole through the roof and make sure it goes through where you want your vent to go.
How to install a range hood through the ceiling step 1.
Use this tutorial if you determine that venting through the roof is the best route.
From up on the roof use a jigsaw or reciprocating saw to cut a 4 in.
Use roofing nails to nail the lower half of the flange in place at the corners.
Range hood installation can involve drilling a new vent hole through a wall which can require new wiring and ductwork while replacing old ones can be a simpler process.
It is easier to install equipment when you disassemble its parts.
If you are adding a new range hood over your stove and plan to vent it out through the roof you will need to get an adequately sized duct that will run all the way up through the ceiling into the attic and all the way up through the rooftop where it will be connected to your roof top vent.
Installing a new roof vent will require either hiring a roofing contractor or doing it yourself provided you are handy and can exercise proper safety precautions while on the roof.
The should cover the top of the vent flange.
Measure the range hood to determine where the vent comes out on the range hood and mark it on the wall.
The lower part of the vent flange however will sit on top of the shingles.
Start in the attic and drill a hole through the roof in the desired vent location.
Some range hoods have internal blowers that recirculate the air in the kitchen without external venting.
This guide reviews how to install a range hood and remove an old one.
Mark out spots on the ceiling.