How do I ventilate the roofspace if I have no fascia or soffit?

Over fascia ventilator strips can be adapted to a variety of different situations. As its name implies, the ventilator is designed to fix on top of the fascia board, tilting the tiles to their correct plane. However, where there is no fascia the ventilator can be fixed, for example, directly onto corbelled masonry. Over fascia ventilators can also be used in internal box gutter situations, junctions between sloping and flat roofs and even at monopitch ridge junctions.