The traditional reinforced kraft paper laminate, commonly used in the construction industry, meets the highest grade requirements of BS 1521 materials. Known as Polybit, this variant of the A1F Standard Building Paper is enhanced with a clear polythene coating and provides add...Read More
The traditional reinforced kraft paper laminate, commonly used in the construction industry, meets the highest grade requirements of BS 1521 materials. Known as Polybit, this variant of the A1F Standard Building Paper is enhanced with a clear polythene coating and provides added strength and durability, in turn making it suitable for various demanding conditions.
As BS 1521 does not offer specific guidelines for its usage, Polybit serves as a generic and versatile material that caters to a wide range of applications defined by end-users. Over time, Polybit has found common use as a vapour check, underlay for uninsulated cladding, underlay for flat lead sheets, damp proofing for timber floors, and heavy-duty temporary protection. It is also commonly employed when separation layers, bond breaks, and barriers against draught and dampness are needed.
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