
Designed to meet the requirements of Building Regulations 1992 B FIRE B1.Complies to BS476 Part 3 1975.Complies with Building Regulations Part L 2002.Can be used with slate or tiled roof.20mm Double Glazed.Sash rotates through 125deg for cleaning.Adjustable ventilation in the frame.Suitable for roof slopes 15-85deg from horizontal.Fitting instructions included.WARNING: Product is heavy and contains glass