Kitchen Exhaust Flue

Its taken ages, but the flue for the kitchen exhaust fan is now in place. The cowling used has dampers in the top to stop back-flow of air into the house when its not in use (an energy requirement for our house). Unfortunately, the cowling is rectangular in shape, which means that I could not get an off-the-shelf sealing system for it.

Its an ugly looking cowling, but fortuantely its nestled out of sight in the internal valley of our roof. This also avoids having to put a penetration through the visible slate section of the roof.

The photo shows the first seal - silicon around the perimeter. Tomorrow I will finish it off with acrylic-coated lead flashing left over from the verandah hips I did recently.