Universal Non Breathable underlay is a 140g/m² membrane that comes packed full of features and benefits designed to promote consistent installation to the British Standard:
Marley Eternit Universal Non Breathable underlay is a high performance, impermeable roof membrane for use in a range of pitched roof constructions, where traditional ventilation methods are preferred.
Complete with an integrated tape system, this underlay provides and effective wind barrier, with unrestricted usage across all UK wind zones (BS 5534)
A three-layer composite comprising of two spunbonded polypropylene fabrics - with a non-breathable polyolefin film - provides an ultra strong, durable and easy-to-install under-tile layer that is suitable for warm or cold roof applications.
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