The lower half of the flange sits on top of the shingles.
Fitting extractor fan roof vent.
Http www fixmyroof co uk roof vents this video shows how easy it is these days to install and fit roof ventilation with dedicated roof tile vents as a dire.
I have my fan vented out through the roof but near the inside of the roof in my attic the vent leaks a bit and condensation gets on the wood and a bit down in the insulation around where the vent goes out.
Slide the vent under the shingles so they cover the top half of the vent flange.
Ceiling mounted fans typically use ducts hidden in the walls ceiling or attic to reach a safe exit point on the roof or a wall.
Steam in your bathroom and kitchen can also lead to damp if your ventilation is poor.
I can feel some water around the metal wrapping of the vent where there is an opening.
Ventilation in your roof space if you have a standard pitched roof the simplest way to ventilate it is to fit plastic vents in the soffit board.
In these cases fitting an extractor fan is an effective way to reduce condensation.
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Apply a bead of asphalt roof cement on the bottom of the vent.