Our most popluar, highly vapour permeable roofing underlay with 170 g/m²

173 Alfa Rufol UDB-A 165 (roofing underlay)

A-classified (ZVDH), driving rain proof, highly vapour permeable roofing underlay for ventilated and non-ventilated pitched roofs. Suitable as temporary roofing up to 6 weeks (roof pitch > 16°). Available with or without self-adhesive strips.

Product details

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173 Alfa UDB-A 165 sheathing membrane in dark grey or blue

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Item-No.	Measures	Packacking Unit	Price	Quantity
173 5015 SK (002)	1,5 m x 50 m (75 m²) dark grey, with adhesive strips	2 rolls	**
173 5015 SK (010)	1,5 m x 50 m (75 m²) dark grey, with adhesive strips	10 rolls	**
173 5015 SK (024)	1,5 m x 50 m (75 m²) dark grey, with adhesive strips	24 rolls	**

173 5015 BSK (002)	1,5 m x 50 m (75 m²) blue, with adhesive strips	2 rolls	**
173 5015 BSK (010)	1,5 m x 50 m (75 m²) blue, with adhesive strips	10 rolls	**
173 5015 BSK (024)	1,5 m x 50 m (75 m²) blue, with adhesive strips	24 rolls	**

173 5015 (002)	1,5 m x 50 m (75 m²) dark grey	2 rolls	**
173 5015 (010)	1,5 m x 50 m (75 m²) dark grey	10 rolls	**
173 5015 (024)	1,5 m x 50 m (75 m²) dark grey	24 rolls	**

173 5015 B (002)	1,5 m x 50 m (75 m²) blue	2 rolls	**
173 5015 B (010)	1,5 m x 50 m (75 m²) blue	10 rolls	**
173 5015 B (024)	1,5 m x 50 m (75 m²) blue	24 rolls	**

173 5075 (004)	750 mm x 50 m (37,5 m²) dark grey	4 rolls	**
173 5075 (020)	750 mm x 50 m (37,5 m²) dark grey	20 rolls	**
173 5075 (040)	750 mm x 50 m (37,5 m²) dark grey	40 rolls	**

Product description

TU-Berlin certified roofing underlay for pitched roofs

Alfa Rufol UDB-A 165 is the A-classified (ZVDH), driving rain proof, highly diffusion open roofing underlay (sub-membrane, sheathing membrane) for ventilated and non-ventilated pitched roofs. It is applied between the thermal insulation and main battens. Suitable for the direct installation on top of the thermal insulation. Alfa Rufol UDB-A 165 prevents the penetration of humidity (e.g. due to driving snow) and penetration of dirt into the thermal insulation.

The 3-layer structure protects the functional membrane from damages and reduces the slipping risk for the processor.
Easy handling: Auxiliary lines allow exact overlaps.

Also available with two additional self-adhesive strips for easier application.