Venting Kitchen Exhaust Fan Through Roof

Vent through the roof run duct work through the attic then attach the stove vent to a roof cap.

Venting kitchen exhaust fan through roof.

Be sure to extend the pipe up at least 2 to 3 above the roof to prevent snow buildup from causing problems. Here you see a very good roof top exhaust hood made by ventilation maximum in quebec where they tend to make roof vents taller to avoid being buried in the snow. On the outside you will see the wind baffle that prevents snow from blowing in. 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.

Use a proper roof top exhaust hood if you must go through the roof. In either case do not vent into the wall or the attic. If you want to replace the range hood and exhaust fan above your stove and vent it to the outside and the stove is against an interior wall you have several options. But the rule of thumb is to route it the shortest and straightest path to daylight.

Yes you can vent a range hood through the roof using a 6 single wall pipe. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. That is five feet upwards along the slope of the roof and away from the bottom edge.