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| Stoneflex |
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Installation
Stoneflex panels may be installed as
a complete weather shield on a supporting
framework (aluminium/timber) or steel battens
as well as infill panels.
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Design Consideration
When weather proofing your building two applications
principles are available:
Rainscreen Cladding:
Controlling rain penetration through vertical
elements: Rainscreen is achieved by installing
panels with controlled open joints. The water
will follow this path and a drainage is being
created.
Sealed Cladding
All panel edges and ways for water penetration
are sealed to form a weather barrier.
Sealed Construction
Bond breaker
PVC extrusion
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Spacing
Vertical framing members or battens should be
placed at a maximum of 600mm with spacing of 400mm
in high impact situations. All joints must be supported
by a framing member.
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| A joint gap of not less than
6mm must be maintained between all panel joints.
A combination bond breaker/thermal break tape should
be used on all framing members, whether steel or
wood (Low density PVC foam seal).
All panels should be fully supported at the perimeter.
Horizontal battens at joints should be placed
with spaces between to allow air and moisture
movement. Start fastenings at the middle of the
top edge of the panel and then down the panel,
proceeding left and right of the centre thereafter.
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Fastening |
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| To protect against the formation
of condensation in the cavity, it is recommended
that a minimum 25mm air space is maintained between
the panel and insulating layer. |
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Recommended Fastenings |
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steel framing:
31mm x 8 flat head tek painted carbon steel
climaseal screws
For wood framing:
Use colour matched stainless steel annular
threaded ring nails with low oval heads
sizes 30mm, 38mm long x 3.1mm
All fasteners have a coloured head to match
the aggregate as closely as possible, and
are available from Stoneflex Ltd.
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Vertical Joints |
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| In addition to PVC foam (bond
breaker) required on all battens, where vertical
joint occurs between panels, either use an open
joint of 4mm wide or a 6mm joint sealed with a suitable
sealant.
Sealant should be:
Non
yellowing
Non
hardening
Resistant
to ultra violet degradation
Low
in dirt pick up
Rain
Screen
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| Rain Screen |
Sealed
Construction |
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Most silicones, urethanes
and polysulphides with a minimum 15 year manufacturer
warranty are suitable. |
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Care should be taken to
consult the manufacturer’s literature
about joint design. |
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For best results, it is
recommended that a recognized sealing contractor
be used. |
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Care should be taken to
protect the stone from excess sealant and
to leave finished work in a neat condition. |
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PVC (colour matched) jointing
strips are also available without the use
of a bond breaker. |
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Horizontal Joints |
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| Fine stone coated G.R.P. flashings
are available “Stoneflex Z section”. These
provide a close match to the panels. (Because of
the process a slight shade difference may be apparent). |
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Ventilation |
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| Panels should be ventilated
wherever possible. This is usually accomplished
by inserting a mesh at the base of the panel to
allow passage of air between battens. |
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Vapour Barrier |
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| It is recommended that a vapour
barrier be installed in all insulated buildings,
as near to the inside of the building as practically
possible |
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Infill & Composite Panels |
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| Stoneflex panels are suitable
for bonding to rigid foam insulation – in turn
a suitable internal balancing membrane is applied.
Panels are selvedge when required to allow the composite
panel to be mounted in aluminium, wood , steel or
uPVC glazing systems with the relevant unit being
completely weather-tight. |
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Colour Matching/Panel Sequence |
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| Only natural aggregates are
used in the manufacture of Stoneflex panels. Care
is taken when mining and crushing to select veins
in which the colour remains constant. To match Stoneflex
on an existing building, a sample of the original
Stoneflex should be submitted. It should be noted
that natural stone aggregates, when mined, can vary
from one deposit to another. Stoneflex Ltd makes
every effort to maintain consistency, but it may
not always be possible to match an existing or desired
aggregate exactly. |
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Cutting |
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Stoneflex panels may be sawn, drilled or routed
on site, using the appropriate tools. An abrasive
carborundum disc is the usual method of cutting.
Eye protection should be worn.
When a great deal of cutting is required, a diamond
saw blade may be more practical. Consult Stoneflex
URP Ltd for more information if required. Where
portable cutting is a necessity, the panels should
be cut from the back
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Drilling |
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When drilling Stoneflex, a carbide
tipped masonry drill should be used. Panels can
be drilled from either front or back
When cutting or drilling Stoneflex, ensure all
dust from the operation is removed from the panel
IMMEDIATELY
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