Mercury Building Products recommend the use of an eaves carrier in both open and closed eaves construction when a Vapour Permeable Membrane is used as the roof underlay in a pitched roof application.
VapR-free Eaves Carriers should be positioned to the lower part of the rafters utilising the area provided for the facia board with an overlap of 100 mm. Fixing should occur on each rafter by simply nailing or stapling.
The roof underlay is positioned over the eaves carrier by a minimum of 200 mm but must not overspill into the gutter. Double-sided adhesive tape should be used to seal the eaves carrier and underlay if requiring a completely sealed roof.
Batten out roof and slate or tile as normal.