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| Mercury Building Products
recommend the use of an Underlay Support Tray 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 Underlay Support Trays
are manufactured from polyolefin re-grind material and are available
in light easy to handle rigid 1.5 metre lengths.This unique
product accommodates all roof pitches and is suitable for New
Build and Refurbishment.It prevents ponding and the need for
a tilting fillet behind the facia board providing a clear drainage
point into the gutter. |
| A unique hinge allows the gutter flange to be positioned at
the appropriate angle of the roof. It also enables the gutter
to be easily installed or replaced without the tile assembly
being disturbed. |
| VapR-free Underlay Support Tray
is waterproof and prevents prolonged exposure
of the underlay to U.V. radiation, reducing long term maintenance.
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Installation Guide: |
| VapR-free Underlay Support Tray should be positioned
(rough side up) to the lower part of the rafters at the
eaves with the hinge on the outside of the facia board.
The 50 mm hinge is folded over the facia board and into
the gutter. Alternatively it can be left flat if the gutter
is to be installed at a later date. |
| Each length should have a minimum of 100 mm overlap
and fixing should occur on each rafter by simply nailing
or stapling onto each rafter. The roof underlay is positioned
over the underlay support tray 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. |
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