Secure the flashing as instructed with nails or roof cement.
Fitting roof window flashing.
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.
Finally fit the flashing above the frame.
Flashing is installed to surround roof features such as vents chimneys and skylights.
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.
When fitting flashings to flat roofs no overlap onto the roof is required as the roof itself will have it s own upstand flashing built into it.
Moving up on to the roof fit the flashing around the frame according to the manufacturer s instructions.
This is a video showing the fitting of a velux roof window with instructions.