Then move up the sides of the frame.
Fitting roof window flashing.
Moving up on to the roof fit the flashing around the frame according to the manufacturer s instructions.
Flashing is installed to surround roof features such as vents chimneys and skylights.
Start by fitting the sill flashing at the bottom of the frame.
Finally fit the flashing above the frame.
All the same rules of flashing apply except only the measurements of chase depth and drop are required.
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.
Secure the flashing as instructed with nails or roof cement.
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.