How To Do Lead Flashing On A Pitched Roof

The most common method of fixing lead flashings is to make a lead bung also known as a lead chock.

How to do lead flashing on a pitched roof.

It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling. You will then need to form the lead into shape on the ground using timber planks and a lead dresser. 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. Cut lead sheets to the regulation required length of 1 5mtr on the ground.

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. To install the roof wall flashing above the builder bent the top edge of the flashing into a 90 degree lip about 2 cm in width. To fit the lead flashing onto the roof lead dressing tools can be used.

Shape the lead flashing. How to fix lead roof flashing the most common method of fixing lead flashing is to make a lead bung or chock. Cut the lead into 1500mm lengths. First shape the 20mm chase by tapping the lead over the plank and forming a lip.

Do this for all 1 5mtr lengths. That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. 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.

Then carefully bend the lead to form the pitch of the roof again using the plank. Any longer than 1 2 metres long and the lead will be harder to shape and more likely to split over time. Fasten loose nails and cover exposed nail heads with roofing cement.