How to Install Lead Roof Flashings - Easy fit roof flashing DIY

How to Install Lead Roof Flashings - Step-by-Step Tutorial

1. Prepare the Work Area

   • Identify the area where you need to install the lead roof flashings.
   • Remove the mortar on a brickwork course, ideally at a height of 150 millimeters (6 inches) above the roof. If the area is not exposed to high weather volume, this height can be reduced to 75 millimeters.
   • Use a small angle grinder fitted with a diamond-tipped mortar raking disk to chase out the mortar. Ensure to wear eye protection and a dust mask.

2. Clear the Chase

   • Remove the mortar from the entire run of your flashings.
   • Aim for a depth of around 15 to 20 millimeters to avoid weakening the strength of the bricks.
   • Use an old slotted screwdriver to pick out loose mortar effectively.

3. Measure and Cut the Lead Flashings

   • Measure the chase depth, the drop of the wall flashing, and the overlap onto a flat roof upstand.
   • Cut a section of milled lead around 1.2 meters (4 feet) in length using a timber piece to flatten it.
   • Set the depth of the lead into the chase and position it over a sharp angle to create the desired drop and overlap point.

4. Fix the Lead Flashings

   • Secure the lead flashings by fixing them into the nail holes of the tiles using roofing buttons.
   • Space two straps to every 1.2 meter length of flashing to prevent excess force on the fixings over time.
   • Hammer in fixings into the chase to trap the lead work between the brick faces.

5. Finish the Installation

   • Hammer the lead flashings flat to the wall and tiles gently to ensure a secure fit.
   • Fold over, cut, and tap down the ledge joins that do not coincide with a strap to prevent wind lift.
   • Point up the chase with mortar or seal it with a lead chase sealing product.
   • Gently tap down the lead work with a bowl stop to provide a key for the mortar to bond to.
   • Apply mortar to fill and finish the joint, ensuring it is properly sealed to prevent leaks.
   • Rub patination oil into the lead to maintain its appearance and prevent white streaking or carbonization.

6. Finalize the Installation

   • Check for any loose or leaking mortar and fix it immediately.
   • Ensure the flashings are securely in place and properly sealed for long-term durability.

7. Additional Tips

   • Consider installing sequential overlaps to maintain a neat appearance.
   • Follow the recommended overlap measurements for a secure fit.
   • Use stainless steel strapping for added durability in exposed areas.

By following these steps carefully, you can successfully install lead roof flashings on your own. Remember to prioritize safety measures and take your time to ensure a quality installation.