Hi, I'm planning on installing a lean to door canopy above my front door. The length would be 1650mm and 500mm deep (approx). The roof would be clad with 12 Marley ludlow roof tiles on membrane paper on top of OSB. The underside will be clad in upvc shiplap cladding. Will it be necessary for me to ventilate the roof space, either at the wall abutment, the eaves or both?
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