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Hi woody, correct, both sides are needed. What would be the best option to do that retrospectively? Read more: https://www.diynot.com/diy/threads/ventilation-for-cold-flat-roof.533378/#ixzz65YNsvK1x

Hi woody, correct, both sides are needed. What would be the best option to do that retrospectively?

on one side I have guttering, but not the opposing side. Does over fascia vents work for a flat roof (FibreGlass) ? Does it cost a lot more work to retrofit?

many thanks, Notch7. Is it watertight? will rainwater sip in when strong wind? I dont understand "Please make sure you have downlighters protruding through into the void", what does that mean? Read more: https://www.diynot.com/diy/threads/ventilation-for-cold-flat-roof.533378/#ixzz65NSdLH3u

I mean for the solution your flat roof ventilation.

Hi Tallrobw, what is your solution? I am facing the same issue now with the building inspector.

Hi nematoad, did you get anywhere? I'm now faced with the same issue and (obviously) looking for solutions! At the moment I'm considering extending the roof over a box consisting of vented sofits and fascia boards. Read more...

I am facing with the situation in converting part of my new garage into my office. I need to vent the 50mm gap above the ceiling insulation on a cold deck flat roof. I only know that during the last building regulation inspection. Roof is flat fibreglass so no over fascia vents like you would...