Page 17 - roofing

LEAD PITCHED ROOF

BLM Class A1F Building Paper

• Reinforced bitumen bonded building paper laminate
• Manufactured from wet strength kraft paper conforming to BS1521 Class A
• Protects lead against alkalis from concrete, stone and screed surfaces
• Ideal for use on plywood substrates

Code Description
P025503 1 x 25m

BLM Standard Underlay

• 220g/m2 Non-woven polyester
• Should be laid under all lead sheet over 600mm wide
• Protects lead underside from imperfections in the roof decking
• Allows the lead to breathe

Code Description
P024294 1 x 25m

BLM T-Pren Expansion Joint

• Used where drips and falls cannot be incorporated in to the gutter structure
• Neoprene section takes expansion and contraction
• Manufactured from British standard code 5 lead
• 10 year guarantee

Code Description
P018118 385mm x 3m

ROOFING – ISSUE 1 17