Too Cold To Install Bath Vent In Roof

This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.

Too cold to install bath vent in roof.

A michael maines answers and gives advice on the question about bath fan venting for cold climates. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. The house is too high to see if that box has any kind of fitting on the roof but it doesn t look like it from the attic.

Vent your bath and kitchen exhaust fans through the roof through a special roof hood. We explain how to install bathroom exhaust fans or vents the vent ducting. How to install a bathroom vent fan. Here in the north we vent the bathroom exhaust through a bulkhead to the exterior wall the exhaust ducting is insulated and has a slight slope to the exterior wall to allow any condensation to escape we also install a 5 6 length of plywood at the eaves so the exhaust can t get into the attic space.

The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof. The common solutions to this ice problem are to use a higher powered fan use a larger diameter shorter duct run and wrap the pipe with better duct insulation. See below for a shopping list and tools subscribe.