Corotop Red Strong Roof Underlay


Roof Underlay used on tiled or slated pitched roofs

Corotop Red Strong is a very durable, three-layer highly vapour permeable membrane. Its layers are joined with a thermos bonding method, which guarantees strong connection between them. Usage of this membrane increases the safety during application. It is recommended especially for fully-boarded roofs.

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What the experts have to say

This Certificate relates to Corotop Breathable Membranes for use on tiled or slated pitched roofs. Corotop Breathable Membranes are manufactured by thermally laminating a water vapour permeable film between two layers of non-woven polypropylene. This Certificate certifies compliance with the requirements of the Building Regulations 1997 to 2014.
  • Minimises heat loss

  • The product with unquestionable resistance parameters in its class

  • Protects thermal-insulation against damping

  • Regulate two-way vapour permeability

0.7 mm
Mass per unit area:
180 g/m2
Tensile strength:

Longitudinal 340 N/50mm

Transverse 235 N/50mm


Longitudinal 70 %

Transverse 120 %

Tear resistance:

Longitudinal 255 N

Transverse 355 N

Full Information:
Check out the full datasheet available in the Downloads section!

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