Redland ST4, Руководство по установке

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13 of 28 ST-BARS-V1 RKA 03-02-2009
29. Ensure that the entire length of the left hand
side flashing is clipped at every batten.
30. Repeat the process for the right hand side
flashing ensuring the entire length is clipped at
every batten.
31. Use the tables to determine the height and
position of the 25mm wide tile support/clip
batten, and whether this is to be fixed to the
rafters or a tiling batten
. This should extend
each side to (and over) the first rafter beyond
the side gutters. The support/clip batten should
support the tiles or slates at the same plain and
angle as those generally on the roof slope, and
enable them to be clipped as required.
If fixed to rafters, the batten must not be less
than 32mm high (packed under if required with
batten timber), and fixed at all crossings with
galvanised nails of length to penetrate the
rafters at least as much as the batten fixings.
If fixed to a tiling batten: Either - fix at 300mm
centres with galvanised nails that nearly fully
penetrate the tiling batten (which must be at
least 25mm thick); Or - fix through battens to
rafters at all crossings with galvanised nails of
length to penetrate the rafters at least as much
as the batten fixings.
32. (See also Diagram – Item “31”): Install the
self-adhesive Sealband foam strip across the
entire width (left to right) of the upper gutter and
heads of the side gutters. Ensure that the gutter
is clean and dry, and then peel off the protective
strip from one 2m strip and stick the foam to the
surface on the roof slope, abutting the upstand.
Measure and cut the required length from the
second 2m strip, then stick as a continuation of
the first strip, ensuring a good butt joint with no
gaps.
The tiles must lap the gutter upstand by at least
the minimum headlap for the tile and pitch and
not less than 100mm.
If the required minimum tile lap cannot be
achieved over the gutter upstand, first install
and properly fix a strip of BS 747 5U Felt over
the upstand and support/clip batten. Add extra
battens if required to ensure that the required
lap is achieved (up-slope from clip batten), and
that the felt does not span more than 40mm
(between upstand and support/clip batten).
This should be held against the upstand by the
Sealband strip (also use suitable waterproof
adhesive if required). A suitable proprietary self-
adhesive roofing tape can be used in
accordance with manufacturer’s instructions
and recommendations, instead of the 5U Felt..
The
full tables show which tiles and batten
gauges will require this “Top Flashing”.