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1
Moss Xiques
Natural Slate
Efficiency & Performance
Eco-Friendly Roofing Solution
Course #: 40107626_101

• Credit(s) earned on completion of
this course will be reported to AIA
CES for AIA members. Certificates of
Completion for both AIA members
and non-AIA members are available
upon request.
• This course is registered with AIA CES
for continuing professional education.
As such, it does not include content
that may be deemed or construed to
be an approval or endorsement by the
AIA of any material of construction or
any method or manner of
handling, using, distributing, or dealing
in any material or product.
____________________________
• Questions related to specific materials,
methods, and services will be
addressed at the conclusion of this
presentation.
AIA CES

Copyright Materials
This presentation is protected by US and International Copyright laws.
Reproduction, distribution, display and use of the presentation without written
permission of the speaker is prohibited.
© CUPA USA Inc. - 2013
CUPA – World Leader in Natural Slate

CUPA, Natural Value Company
• CUPA PIZARRAS is the natural slate division of CUPA, a company with more than 100
years experience in the slate industry, international leader in slate production and in the
development of more energy-efficient building solutions to promote the use of natural
slate.
• Our main objective is to respond successfully to an ever-growing demand for natural
slate
• CUPA PIZARRAS owns 16 quarries, and 22 factories, extracting 140,000 tons of slate each year and
comprises a workforce in excess of 2000.
CUPA, NATURAL SLATE
CUPA’s corporate headquarters, Spain

At the end of this course, participants will be able to:
1. Know how roofing slate is produced… From the quarry
to the roof…
2. Identify slate quality and detect potential problems.
What do you need to ask when using slate in a project?
3. Know about ventilated facade systems with Natural
Slate… CUPACLAD from a technical and practical
point of view.
4. Know the only invisible Thermal Solar Panel with
Natural Slate… Innovation, Performance & Tradition.
Learning Objectives

Vermont Slate Co – US Leader in Natural Slate

1. NATURAL SLATE
NATURE’S ROOFING MATERIAL

- A smooth, fine-grained metamorphic rock that can be split into layers
- Formed under great pressure and heat starting 400-500 million years ago
- Made up of inert materials such as silicates, quartz and mica
- Natural, beautiful, colors and shades vary
- Resistant to heat, cold, sunlight and acid rainfall. Non-porous
- Most slate roofs should last 100 years or more
- Low maintenance costs
- Environmentally friendly
CUPA HEAVY3
Natural Slate - Characteristics

90% of the slate sold in the world is Spanish
France 50%
Belgium 4%
Others 8% (Incl. USA)
Germany 18%
UK 20%
Natural Slate - Demand

Before Quarrying…
• Overburden. Sometimes
hundreds of feet thick.
• Geological surveys are carried
out to find out the best areas.
• Extraction begins only when the
quality of the slate rock has been
verified.
Natural Slate – How it is produced

• Generally slate is surface quarried but occasionally it is mined.
• Firstly, the ‘overburden’ (fragmented, unusable material)
is removed
• The slate is then sawn from the quarry face in large flat slabs using a diamond beaded
steel cable
Quarrying…

• The quarried blocks are then
transported to factory adjacent to the
quarry
• The large slabs are inspected, sorted
and sawn across their natural
‘cleavage’ planes into smaller blocks
Factory Sawing…

• These blocks are then hand split by
skilled craftsmen into slates of the
finished thickness
Factory Sawing…

• The edges of each slate are then
“dressed” to give the traditional
chamfered edge and exact finished
size.
Factory Sawing…

• The slates undergo final inspection and sorting
• They are then counted, bar-coded and labelled
• Finally the finished slates are packed vertically in crates for transportation and
shipment
Final Inspection & Packing…

• Natural slate can have a widely
varying chemical and mineral
composition
• Its composition is determined by
the geology of the quarry.
• Iron pyrites: Stable and unstable
Natural Slate – Composition

Comparison of French - British - European Standards

• CUPA employs quality assurance
procedures under a system approved to
ISO 9001: 2000
• Each quarry has quality approval from the
National Laboratories of its customer
countries
• CUPA has its own laboratories on site
Natural Slate – Quality Control

Each crate of CUPA slate has its own label, which holds all the information an
end user might need to know about the origin of the slate, the slate type, its
dimensions and test results. The bar coding gives further information about
where and when it was processed and even who worked on that particular
batch.
Natural Slate – Traceability

• Unstable Iron Pyrites
• Water absorption too high
• Breaking strength too low
• Pre-existing de-lamination
• Calcium carbonate content
too high
Characteristics of poor quality roofing slate

• Ask for evidence of recent test
certification, preferably to French
Standard P32301, showing date,
name and origin of slate
• Are sufficient stocks available for
duration of project?
• Traceability- Is the slate arriving on
site what you specified?
A check-list for problem-free slate specification

• Cupa Natural Slate, great focus in
sustainability
• Cupa is the only Natural Slate that has
achieved an A+
• Rating for the lowest environmental
impact in the BRE Green Guide to
Specification
BRE Certification

8 to 15mm
gauge
head lap
Holing gauge =
gauge + lap
8 to15mm
20 to
25mm
Bond/side lap
tail
Exposure
The nail hole should
be approx. ¾”-1 ¼”
from the edge of the
slate. Distance from
top depends on slate
length. For ex. 4 ½”
on a slate 16” long
The nail hole should
be made from the
underside of the
slate.
Proper head lap
depends on pitch.
Should be 3” at least.
Fixing Terminology

The position of the
nail holes is
dependent on the
pitch (angle) of the
roof and the site
exposure.
At lower pitches or in
exposed situations
slates must overlap
more to resist wind
driven rain.
Fixing Terminology

2.1. CUPACLAD – VENTILATED FAÇADE
SYSTEMS WITH NATURAL SLATE

New solutions with Natural Slate…

Ventilated façade systems with
natural slate
New solutions with Natural Slate…c

VENTILATED FAÇADE. Main advantages Chimney effect
 Reduction of condensations and humidity; and
elimination of filtration of rainwater.
 Reduction of structural movements and cracks
in the building
 Energy saving and thermal comfort, thanks to
the cooling of the building in the summer, and the
control of thermal dispersion in the winter.
 Increase the durability of the cladding

3 DIFFERENT VENTILATED FAÇADE SYSTEMS
Traditional installation…
- CUPACLAD 301
New solutions…
- CUPACLAD 101: Invisible system
- CUPACLAD 201: Visible system

CUPACLAD 301
- All avaliable slate formats in CUPA range
CUPACLAD 301
-Tradicional way of installation with triple lap. This
makes the facade fully waterproof.
- The fixings can be visible or invisible
- The installation of this system must be performed
by a specialist in slate roofing.

CUPACLAD 301

CUPACLAD 101
- CUPA natural slate 16x8 inches (40x20cm.) and
7,65 mm. nominal thickness.
CUPACLAD 101
- The special screw CUPACLAD 101 in
stainless steel has been especially
designed by CUPA for the installation of
natural slate in façade.
- Vertical and Horizontal battens must
have a treatment against biohazards
(EN335-2), for dampness
- The stale has a rough surface, and was specially
selected for its technical features to provide the best
guarantees for installation in façades
- The slate is installed horizontally with invisible
fixings

CUPACLAD 101

CUPACLAD 201
CUPACLAD 201
- CUPA natural slate 24x12 inches (60x30 cm.) and
6 mm. nominal thickness.
- The special bracket CUPACLAD 201 in
stainless steel has been especially
designed by CUPA for the installation of
natural slate in façade.
- Vertical and Horizontal battens must
have a treatment against biohazards
(EN335-2), for dampness
- The slate has been specially selected for its
technical features to provide the best guarantees for
installation in façades
- The slate is installed horizontally with invisible
fixings

CUPACLAD 201

MAIN ADVANTAGES OF CUPACLAD
- Ecology friendly material
- Modern design
- Durability
- Low maintenance
- Easy and quick installation
- Appealing to architects
- Competitive cost

Enzo’s Market Chattanooga, TN

2.2. THERMOSLATE – THERMAL SOLAR
PANEL WITH NATURAL SLATE

THE BUILDING LIKE A SOLAR COLLECTOR
A solar collector is any device designed to collect the energy radiated by the
sun and convert it into thermal energy.
Solar Architecture – Invisible Solar Integration…

SOLAR COLLECTOR IN NATURAL SLATE (MODEL TSV6.22)
ROOFS MODEL
- Empty weight: 24,5 Kg
- Gross area: 1,48 m2
- Maximun flow : 130 l/ hm2
- Installation: Ventilated

1
2
3
4 5
1. Waterproofing sheet
2. Fixing piece
3. Slate
4. Thermal resin
5. Pipe system
6. Insulation
7. Back sheet
6
7

FRONT SIDE
WATERPROOFING SYSTEM BETWEEN COLLECTORS
TOP SIDE
16 cm

ANOTHER TEST
TEST Testing Lab RESULT
Wind
Tecnalia/ CSTB PASS
Aging/ Climate cycle
Applus/ CSTB PASS
Aging/ Thermal shock Tecnalia/ CSTB PASS
Fire
Afiti/ CSTB PASS

1
2
3
4
5
1. Primary circuit
2. Control system
3. Pump system
4. Exchanger pipe
5. Solar expansion vessel
6. Underfloor heating
7. Solar tank
8. Boiler
5
6
7
8

¿HOW DO I INSTALL THERMOSLATE?
http://www.youtube.com/watch?v=jW1IbX4Caew

FAMILIAR BUILDING. LE POULIGUEN (La Baule -
France)

FAMILIAR BUILDING. VILLAVICIOSA DE ODÓN

FAMILIAR BUILDING. GENT (BELGIQUE)

TSV6.5025.S10
SOLAR COLLECTOR IN NATURAL SLATE (MODEL TSV6.5025)
ROOFS MODEL

COLLECTOR FOR FLOOR AND
VENTILATED FACADE
TS. V6P

COLLECTOR FOR FLOOR AND
VENTILATED FACADE TS. V6P
1
2
3
4
5
6
7
9
10
8
1. Control system
2. Exchanger pipe
3. Primary pump system
4. Solar expansion vessel
5. Primary circuit
6. External exchanger
7. Pool primary pump system
8. Pool filter pump
9. Solar tank
10. Boiler

3. NATURAL SLATE PROJECTS
PORTFOLIO

• The lighthouse building. Copenhaguen
• Architect: Lundggaard og Tranberg
• 8000m2 ventilated cladding with Heavy 3
Natural Slate Projects - Portfolio

The Roman Catholic Church of the Archdiocese of New Orleans-Notre Dame
Shepard Pruden Memorial Library
Private Home

All Private homes

Private Home, Highland Park, Dallas, TXNatural Slate Projects - Portfolio

Wynyard, prestige country park development, County Durham. CUPA 12.

Modern housing development, Ripponden, West Yorkshire. CUPA 12.

Traditional renovation of large farmhouse and barns. CUPA 5.

‘The Riverside’, Durham County Cricket Club, Chester Lee Street, County Durham. CUPA 5.

Prestigious city centre retail, office and housing development, Wales. CUPA 10.

Traditional renovation project, East Sussex. CUPA 12.

Apartment Development, Edinburgh. CUPA Heavy 3.

Museum, Brugge. CUPA 4 Cathedral Almudena, Madrid. CUPA 12
CUPA Natural Slate Project Profile

Heritage renovation, Aaboulevard, Copenhagen.
CUPA Heavy 3.
Chantier de Prestige, Lille, France. CUPA 4.

Please ask about joining me on an informative and very
enjoyable, complementary, three day trip to Spain
where you will visit a quarry and witness the complete
CUPA production process as a guest of
CUPA Natural Slate.

This concludes The American Instituted of Architects
Continuing Education Systems Course

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