Calder lead



Lead flashings are an important part of a durable and watertight roof. These must be held in place correctly and traditionally lead wedges have been used. Calder Clips are a great alternative to this, putting far less pressure on the surrounding joint whilst maintaining a secure, strong and reliable hold on the flashing itself, all the while allowing for natural thermal expansion.


When using nails to fix lead into place only copper or stainless steel nails should be used. These ensure security, longevity and compliancy with relevant guidelines.

Calder’s high-quality copper nails are specifically designed and manufactured to meet the requirements of British Standard BS-1202-1&2. This stipulates that nails should have shanks that are annular ring, helical ring or serrated and be no less than 20 mm in length. The stipulated shank diameter for light duty use should be at least 2.65 mm and for heavy duty use at least 3.35 mm.

  • Available in 25 & 30 mm length (1 kg per bag)
  • Available in 3.35 mm Annular Ring Shank


Calder’s decorative lead sheet fixing set includes all items required to construct a durable, high-quality, weatherproof intermediate fixing.

The set includes a Lead Dome, Brass Screw, Brass Cup Washer and Nylon Washer.

  • Available in complete sets 5 x 20 packs


Calder recommends the use of restraint straps to easily hold the free edges of lead flashings in place.

Our restraint straps can be cut to the required length suitable for the application and project requirements. 

They should be at least 50 mm wide and turned over at the edge of the lead by at least 25 mm (except where they are tucked into welted edges). Continuous restraint straps should be at least 75 mm wide and spaced at 300 to 500 mm centres depending on exposure.

  • Available in Copper (0.6 mm) or Stainless Steel (0.5 mm)
  • Fixing Strip available in 20 m x 50 mm coils
  • Fixing Clips available in 600 mm x 50 mm –packs of 25 only