The OF2 1M Over Fascia Vent Timloc is the perfect solution when your pitched or flat roof needs primary ventilation but you're up against constraints on the fascia board. This durable and efficient ventilator offers 25mm of unobstructed air flowthe equivalent to a 25,000 mm continuous openingand comes in convenient 1m lengths for easier installation. Whether your roof has living accommodation within it, or slopes at an angle of less than 15 degrees, this ventilator is the ideal choice. The OF2 1M Over Fascia Vent Timloc is ideal for eaves ventilation, flat roof abutment ventilation, or any kind of roof that features a fascia board with no soffit. With excellent durability and performance, this product is sure to deliver years of worry-free satisfaction!