Warm Roof Structures - Control of Condensation

Duo pitch roof with clear air path
Where underlay/breather membrane is to be installed on top of counterbattens.
OR
Where 50mm air passageway between insulation and underlay/breather membrane occurs below the top face of the rafter.

Read more about the control of condensation requirements for this type of construction and the Decra solution.

Duo pitch roof with clear air path
Where breather membrane is to be installed on top of rafters (i.e in contact with insulation) and underneath 50mm x 50mm counterbattens (or 38mm where Decra 700 breather membrane is used).

Read more about the control of condensation requirements for this type of construction and the Decra solution.