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  • Leadax can be used as a water barrier in (cavity) walls and under casings.
  • At the intersection between chimney bases and roof tiles.
  • At chimney flashings to provide a water barrier.
  • Leadax can be applied to the base of dormers and skylights as a waterproofing layer at the joint between dormer side walls and tiled roofs.
  • As a watertight connection between an outside wall and an extension. Use Leadax masonry clips to attach Leadax to masonry joints.
  • Leadax can be used as valley gutters and waterproofing on the ridges of (tiled) roofs.

Frequently used Leadax applications


Aluminium expanded metal on both sides with a layer of modified polyvinyl butyral, with a removable protective film on either side of the product. Leadax is patented.

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Colours and sizes

Roll lengths of 6 metres (3.85 kg per square metre and thus 75% lighter than 18 pounds or code 4 lead). Comes in lead grey as standard. Available in black, roof tile red and other colours on request.

Leadax prefab

Leadax is ideal for use as a prefab element. It reduces the time required for installation and manufacturing, and there is no risk of construction errors.

Masonray walls

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Cavity walls

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Chimney flashings

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