Standard Underlay
BLM Standard Underlay is a non-woven, crimped filament poIyester, needle punched to allow air to circulate freely between the underside of the Lead Sheet and Timber board decking with penny-air gaps, preventing condensation forming and corroding the underside of the Lead Sheet.
Allows Lead to breathe, preventing condensation forming and corroding the underside of the sheet
Protects against imperfections in timber board substrates, allowing the Lead to expand and contract freely during thermal movement
Resistant to high temperatures
Prolongs the life of correctly fitted Lead Sheet
Dimensions:
25m x 1.0m rolls
Other
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