Behind existing wall flashings

• At survey stage ensure liner can go behind the existing flashing
• Ensure that the existing flashing is sealed/chased to the full length of the wall
• Ensure the existing flashings are in good condition and suitable for use
• Ensure the liner is installed to within 5mm to the area where the existing flashing is sealed/chased to the wall
• Suitably fix the liner to the existing parapet at 500mm centres using the specified fixings
• Re-dress the flashing over the liner