Product code: B031101
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OF1 provides ventilation equivalent to a continuous 10mm opening (10,000mm2) and is used to ventilate pitched roofs of 15?> and the roof void is uninhabited loft or attic space.
- Efficient, very unobtrusive and easy to fit
- Superior strength construction ? will carry the weight of the bottom row of tiles
- 3.5mm ? 4mm wide ventilation slots comply with BS 5250: 2011
- Durable and totally resistant to decay
- UV stabilised and colourfast