Fitting Roof Window Flashing

Start by fitting the sill flashing at the bottom of the frame.

Fitting roof window flashing.

All the same rules of flashing apply except only the measurements of chase depth and drop are required. Secure the flashing as instructed with nails or roof cement. Then move up the sides of the frame. Finally fit the flashing above the frame.

This is a video showing the fitting of a velux roof window with instructions. Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer. When fitting flashing where a flashing product hasn t previously been installed the mortar will generally need to be removed from brickwork particularly when installing flashing between a wall and a roof above windows and doors and other situations involving brickwork. Flashing is installed to surround roof features such as vents chimneys and skylights.