Rough side for tiling according to bs
so it does
6.2.4.2 Sheets and boards
Sheets and boards include the materials listed in 6.1.2.6, except
plasterboards; sheets or boards should be adequately braced to
provide a rigid surface, be free from any springiness and surface
undulations and undergo no subsequent distortion during and after
completion of the tiling. Wherever possible, the boards should be
screwed, not nailed, to the supporting framework.
In general, where the sheet or board has a smooth and a rough side,
the latter should be used for tiling. The surface to receive the tiles
should be clean and free from dust and other forms of
contamination.
but then....
6.2.4.3 Plasterboards
Gypsum plasterboard is generally suitable as a background for tiling,
but as considerable differences occur in usage between housing and
public buildings, consideration should be given to the plasterboard
specification and the fixing system.
Plasterboard should conform to BS EN 520. Plasterboard is generally
unsuitable for frequently wetted areas, see
BS 5385-4 for further
guidance for wet conditions; where there is exposure to moisture,
e.g. splash backs, the plasterboard should either be type H or
pre-primed and the perimeter sealed.
The following precautions should be observed.
a) When fi xing to timber framing or battening, 12.5 mm board
should be used as a minimum thickness, with stiffening noggings
where necessary.
b) Boards should be positively fi xed by either nailing or screwing
over the complete area.
c) Where boards are not fi xed to timber backgrounds, reference
should be made to BS 8212 or the recommendations for the
proprietary system by the manufacturer.
d) The weight of tiling should not exceed 32 kg/m2, generally
equivalent to tiles with a thickness of 12.5 mm or natural stone
tiles with a thickness of 10 mm.
e) Boards should not become damp either during storage or after
installation.
f) Plasterboard wall linings not fi xed by nails or screws should be
allowed to stand for ten days before tiling commences.
g) Where tiling heights exceed 2 400 mm, reference should be
made to the recommendations of the plasterboard
manufacturer.
h) The tiles should be fi xed directly on the paper facing of the
plasterboards in accordance with the adhesive manufacturer’s
instructions.
lets hope he scew-fixed it !! i still have a big box of board nails in the lock-up !!
