How To Do Lead Flashing On A Pitched Roof

Shape the lead flashing.

How to do lead flashing on a pitched roof. First shape the 20mm chase by tapping the lead over the plank and forming a lip. It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling. Any longer than 1 2 metres long and the lead will be harder to shape and more likely to split over time. To fit the lead flashing onto the roof lead dressing tools can be used.

Cut lead sheets to the regulation required length of 1 5mtr on the ground. Having taken the measurements on the roof of the required folds in the lead to fit the job being done using a length of timber mark out the lead along the width of the roll to fold it. You will then need to form the lead into shape on the ground using timber planks and a lead dresser. Now cut a piece of milled lead to around 1 2m long with the measured distance as the width of the lead.

This is made by rolling up a 25mm or less strip of lead into an oval shape just wider than the mortar chase you are fixing then driving it below the surface of bricks to form a wedge. How to fix lead roof flashing the most common method of fixing lead flashing is to make a lead bung or chock. That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. The most common method of fixing lead flashings is to make a lead bung also known as a lead chock.

Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing. This is made by rolling up a 25mm or less strip of lead into an oval shape just wider than the mortar chase you are fixing and then driving it below the surface of the bricks to form a wedge. Recaulk the joints between the roof and the flashing. Cut the lead into 1500mm lengths.

Dress the lead to the required angle with a lead beater. Do this for all 1 5mtr lengths. Fasten loose nails and cover exposed nail heads with roofing cement.