Introduction Cembrit offers one of
the UK's broadest range of quality
tested natural roofing slates. These
are selected from the finest quarries
around the world.
Accessories are also available.
Applications Suitable for use on all
types of building with a roof pitch of
over 20
o
.
Authority All Cembrit's natural
slates are annually tested to ensure
they meet the requirements of
BS EN 12326-1: 2004. Test
certificates and accompanying
commercial documents are available
on request from Head Office.
Natural slates
DESCRIPTION
Duquesa and Contessa natural
slates are quarried and the selected
material cut to nominal dimensions.
Only the best material is then split
and mechanically dressed to the
size required. Most slates have a
secondary plane of cleavage or
grain which can be determined
microscopically. This grain should
not be confused with the texture
which can be seen on the surface of
the slate which is influenced by the
direction in which the slate is split
with a chisel, either from the top or
the side. The slates have a normal
texture using the classifications
detailed in BS EN 12326.
Accessories include copper slate
nails and stainless steel nail hooks.
Appearance
Duquesa: grey and blue/black,
Contessa: grey and blue/black.
PERFORMANCE
Weather Natural slates can
withstand the most severe weather
conditions including acid rain, sea
air and salt spray.
Fire Natural slates are
non-combustible as designated AA
by the Building Regulations.
Liquids Cembrit's Spanish slates
exhibited Class 1A standard for
water absorption.
Heat Class T1 for thermal cycle
resistance.
Chemical Class S1 for sulphur
dioxide exposure resistance.
Durability All slates will provide a
durable covering to pitched roofs of
permanent buildings when laid in
accordance with BS 5534: 2003,
BS 8000-6: 1990 and ventilated in
accordance with BS 5250: 2002.
Roofing slates
Cembrit Ltd offer a range of slates: Duquesa
TM
and Contessa sourced in Spain.
Cembrit Ltd
57 Kellner Road
London
SE28 0AX
Tel: +44 (0)20 8301 8900
Fax: +44 (0)20 8301 8901
Email: sales@cembrit.co.uk
Website: www.cembrit.co.uk
rps no: 961
Cembrit Ltd