Breathex Roof Underlayment

Notice to the reader.

Breathex roof underlayment.

The preparation of a detailed specification is the responsibility of the design authority. A breatheable underlayment is preferable in all circumstances. A breatheable underlayment is necessary if a vapor impermeable layer spray foam is under the sheathing. In north america we struggle to provide adequate ventilation in roof spaces.

Cedar breather is the solution for preserving the beauty and life of wood roofing. Its unique breathable technology allows inside moisture to escape the roof system helping to prevent premature roof system deterioration. Breather membranes allow water vapor to escape by condensing on the underside of the metal roof dripping back onto the underlayment and draining to the eave. The roofing assembly material information published in the rcabc roofing practices manual and offered below does not represent a complete set of the manufacturer s data or specifications.

Breathex is our new synthetic roofing underlayment that maintains the core principle of breathability. All wood products need to be able to dry in at least one direction and preferably two. While most other underlayments do not breathe breathex does allowing water vapour to escape from a roof.