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Roof Ventilation

Discussion in 'Roofing and Guttering' started by padstar, 2 Sep 2020.

  1. padstar


    1 Dec 2019
    Thanks Received:
    United Kingdom
    I am not sure how i am going to insulate my roof yet but am edging towards the idea of PIR within/over the rafters. With this in mind and having the roof re tile works booked in for a few weeks time i have been considering ventilation to the loft.

    It is not being used as a habitable room but it is a large usable space so will be used for a bit more than just storage. As a result i want a bit of ventilation in there to both ventilate behind the insulation and roof if i go down that route and to keep the area "fresh".

    I am thinking of a system similar to this -> Link along the eaves perimeter but am slightly confused about venting the upper level. Looking around it appears that 1 vent is recommend per 25-30m2 of floor area. I have approximately 100m2 so that would be 3-4 vents. This is only 1 per elevation which doesn't seem like much. Is this ratio correct.

    I am also looking to make the vents as "invisible" as possible but cant imagine what many of the options will look like in real life. Is there a system that sits under a tile but lifts it slightly for the ventilation peice? Any suggestions?

    I will also require 1 that i can connect a bathroom extract to as well.

    Any help much appreciated.
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