Burlington Slate Ltd

Burlington Slate Ltd
Cavendish House
Kirkby-in-Furness
Cumbria
LA17 7UN
Tel:  +44 (0)1229 889661
Fax:  +44 (0)1229 889466
Email: 
sales@burlingtonstone.co.uk
Website: 
www.burlingtonstone.co.uk
www.burlingtonslate.co.uk

Contact: Steve Brockbank
Tel: +44 (0)1229 889665

Introduction  Burlington Slate Ltd is 
a family owned company that extracts 
and works slate from quarries in the 
English Lake District.  Extraction is 
by use of diamond wires with cutting 
by laser guided machinery in the 
company's modern workshops. 
Further shaping and finishing is by 
local craftsmen to meet customer 
and project requirements. 
Applications  Roofing slates are 
used for all types of pitched roofs 
with minimum pitches depending on 
location, exposure, slate size and 
lap. They may also be used as wall 
cladding.
Authority  Burlington Slate operates 
a BS EN ISO 9001 quality 
assurance system.
Green issues  The use of diamond 
wire extraction avoids the use of 
blasting, creating less damage and 
intrusion on the environment. 

Roofing slates are manufactured 
using two different types of slate:
Blue Grey slate - a metamorphosed 
sedimentary rock and
Westmorland Green slate - a 
metamorphosed volcanic ash which 
contains chlorides that impart a 
green colouring.
Roofing slates are formed by 
splitting the rock along its natural 
cleavage planes to produce thin 
plates. These are trimmed to shape 
and size.
Burlington roofing slates are 
produced in the following three 
different formats. Slate widths are 
never less than half the length.
patterns - cut to fixed length and width;
sized slates - cut to fixed length but 
with various widths;
randoms - cut to random lengths 
and widths.

Burlington also supplies a range of 
vents and terminals.
The Burlington natural slate vent 
comprises a Burlington slate bonded 
to a colour-matched polypropylene 
tray and is laid as part of a slate 
course. The air path is provided by a 
circular cut-out in the slate protected 
by an ABS grille. Concealed baffles 
deflect snow and rain and water is 
deflected by the tray onto the slates 
below. The system is completed by 
PVC-U extension pieces, throatings 
and pipe adaptors - the latter for use 
with ductwork.
The Burlington slate ridge vent 
allows air movement into and out of 
a loft or batten space or acts as 

Burlington Slate Ltd

terminal fittings for soil vent pipes or 
ventilation systems. It comprises an 
angular slate ridge bonded to an 
ABS vent body to which an 
extension piece or pipe adaptor can 
be attached. Units have angles of 
60

o

 to 135

o

.

The Burlington soaker slate vent is 
designed to ventilate loft and batten 
space and is laid as part of a slate 
course with the grille exposed by 
cut-outs in adjacent slates.
It comprises an ABS plate with a 
square grille bonded to a 
polypropylene tray. Concealed 
baffles deflect snow and rain and 
water is deflected by the tray onto 
the slates below. A PVC-U deflector 
for insertion in the underlay is 
supplied and pipe adaptors are 
available to connect to a standard 
110 mm diameter pipe.

Dimensions (mm)
Sized slates have max. width of 435. 
Slate thickness varies, with larger 
slates tending to be thicker than 
smaller. Westmorland Green 
slates tend to be thicker than 
similarly sized Blue Grey slates.
Burlington natural slate vent: 
570 x 305, 610 x 305
Burlington slate ridge vent: 
length - 460 
Burlington soaker slate vent: 
460 x 500
Density  Both slates have a density 
of 2770 kg/m

3

.

Appearance  Westmorland Green 
has a green colour and Blue Grey
is a bluishgrey; surface is the 
unaltered natural riven slate.

Weather  Slate is impervious to 
frost, wetting and drying cycles and 
extremes of temperature.
Fire  Slate is non-combustible.
Liquids  Slate is impervious to 
water.
Biological  Slate is resistant to and 
will not support the growth of 
mosses, lichens, algae or fungi.
Pollution  Slate resists salt attack 
and atmospheric pollution even in 
extreme conditions e.g. marine and 
industrial environments.
Heat  Thermal conductivity is 
2.0 W/mK.
Durability  Slate will not delaminate.

Reference to British Standards 
5250, 5534, 6399, 8000 and BS EN 
12056-3: 2000 should be made.

All products are 
supplied 
normally crated 
and palleted 
direct from the 
company on its 
own vehicles.

The company 
offers the 
following 
services to 
specifiers:
in-depth project consultation, 
technical advice,
help and advice on meeting national 
Building Regulations,
estimating,
product samples,
full product literature and sample 
cards, and
copies of relevant test results.

Further information is available in 
the following Sections of this edition 
of the RIBA Product Selector and 
from the company:
Stone cladding and lining 

(41)

Stone flooring 

(43)S

Interior furniture and 
fittings in stone 

(73), (74)

Stone in landscaping 

(90.4)

Stone Ye
Brochures: Roofing by Burlington, 
Roof Vents by Burlington and 
Roofing Design Guidance are also 
available on request.