Building Papers - Underlay
Verified by manufacturer 5 months ago
Premium underlays for lead roofing, cladding and weathering applications.
Application
Suitable for smooth plywood decking (underside of decking must be ventilated).
Description
Premium underlays for lead roofing, cladding and weathering applications. Must be fitted over whole substrate area.
Features and benefits:
- Conform to BS EN 1521/ A1F.
- Can prevent chemical attack from smooth concrete, stone or oak surfaces.
General information
Color | Brown |
Material | Paper |
Shape | Oval |
Length | 1000 mm |
Height | 200 mm |
Uniclass | |
CAWS | H71/110 Lead sheet fully supported roof covering H71/130 Lead sheet fully supported wall covering H71/150 Lead sheet fully supported covering to dormers H71/160 Lead-covered roofing panels H71/170 Lead-covered cladding panels H71/180 Lead-wrapped panels H71/20 Weathering to H71/250 Weathering to H71/27 Soakers for mitred hips to slate/ plain tile roofs H71/30 Apron flashings H71/310 Ridge/ hip rolls to lead roofs H71/315 Ridge/ hip rolls to slate roofs H71/35 Cover flashings H71/41 Soakers and step flashings H71/410 Apron flashings H71/420 Cover flashings H71/430 Cover flashings H71/440 Soakers and step flashings H71/45 Step and cover flashings H71/450 Step and cover flashings H71/452 Single-step and cover flashings H71/454 Single-step flashings H71/456 Step flashings with secret gutter H71/458 Step and cover flashing with secret gutter H71/460 Change of roof pitch flashings H71/470 Flashings H71/472 Chimney flashings to slate/ plain tile roofs H71/474 Chimney flashings to single lap tile roofs H71/476 Chimney damp-proof course H71/478 Chimney damp-proof course H71/490 Vertical tiling/ Slating bottom edge flashings H71/492 Vertical tiling/ Slating top edge flashings H71/494 Vertical tiling/ Slating side abutment step flashings H71/496 Vertical tiling/ Slating angle soakers H71/497 Lead damp-proof course/ Cavity tray at raking abutments H71/498 Combined lead damp-proof course/ Cavity tray and cover flashing at horizontal abutments H71/5 Lead sheet fully supported covering to dormers H71/50 Flashings H71/52 Chimney flashings H71/54 Vertical tiling/ Slating bottom edge flashings H71/55 Vertical tiling/ Slating top edge flashings H71/56 Vertical tiling/ Slating side abutment step flashings H71/57 Vertical slating angle soakers H71/645 Sheet underlay |
Specification data - Building papers
Width | 1 m. |
Options | Standard A1F. Guidance for specification option: Waterproof, reinforced building paper for use as an underlay, separation, curing layer and vapour check membrane. Polybit Moistop. Guidance for specification option: Polyethylene coated building paper for use as a damp proof membrane. |
Literature
Underlays Datasheet