Handling
Rooflights
should always be handled by two people. If rooflights
are to be mechanically handled they must be secured on pallets and deposited at safe positions on the roof. Great care must be taken
with all rooflights
in windy conditions and with PVC rooflights
in very cold conditions.
Storage
All FAIRs should be stacked horizontally,preferably on a continuous,
non-abrasive, flat, dry surface or on timber bearers at least 100mm
wide spaced at intervals not exceeding 1m. Stack height should not
exceed 1000mm.
Fairs of differing lengths should not be placed on the same stack.
Fairs should always be stored indoors where possible. If storage
outdoors cannot be avoided, then a secure storage site should be
provided, well away from foot and vehicle traffic and ongoing construction
work. All Fairs stored outdoors must be covered with a reflective,
opaque, waterproof tarpaulin draped over timbers placed on top of
the stack to avoid direct contact between FAIR and tarpaulin. Secure
the tarpaulin completely against the wind to prevent any water penetration of the stack or
sunlight entering.
Provide ventilation to give air circulation around the stack and
prevent heat build up under the tarpaulin. Direct sunlight is magnified
in passing down through an uncovered stack of PVC Fairs resulting
in distortion. If a stack is penetrated by moisture, this in conjunction
with sunlight will cause discoloration of the material.
Handling
It is particularly hazardous to handle Fairs in windy conditions.
Fairs in excess of 3m long must be carried by more than one person.
They should be carried edge up and must not be dropped, bent, twisted,
picked up by the ends or walked on.
Cutting
Provided the correct information is supplied prior to manufacture,
it should seldom be necessary to cut Fairs on site. Cutting can cause
damage which will seriously affect the insulation properties of the
rooflight. If cutting is necessary use either a hand or power saw
having a blade with 6-8 teeth per cm and cut slowly with the blade
held at a shallow angle, or a power saw fitted with a 40/60 diamond
grit blade, feeding the sheet into the saw at a constant medium speed.
Support the FAIR close to the cut and take care to avoid creating
stress or vibration when cutting. With Marvec particular care must
be taken at low temperatures as PVC becomes less flexible and more
likely to shatter.
Packaging
All Fairs can be supplied wrapped onto wooden pallets to assist site
offloading and handling. Please enquire for full details.
Drilling
Holes must never be punched through rooflight sheets - use a hand
drill or electric drill but always drill at a low speed. GRP and Polycarbonate
Fairs can be drilled with a standard metal drill bit.
PVC Fairs can be drilled with a metal drill bit having a point angle
of 130º or preferably, with a masonry type drill. Support the
FAIR securely immediately under the drill - apply only light pressure
and avoid creating stress or vibration.
Take particular care with Marvec in cold weather.
Hole Size
To accommodate thermal movement, holes for primary fixings for both
Polycarbonate and PVC Fairs should be drilled at least 3mm larger
than the diameter of the shank of the fixing for sheet lengths up
to 3m and a further 1mm per additional metre of rooflight sheet length
thereafter. If this is not done thermal movement will crack the FAIR
at the fixing positions.
Cleaning
Loosen any dried dirt with lukewarm water and wash with a lukewarm
soapy water solution using a soft cloth or sponge to gently remove
dirt.
Repeat this process if necessary, rinse off and dry with a soft cloth.
Never use solvents or alkaline cleaners. Do not scrub with brushes
or sharp instruments as these will mark the surface.
Maintenance
The general condition of a FAIR and the security of fixings and seals
should be checked periodically as part of the overall maintenance
programme for the structure. If a rooflight is damaged, it must be
replaced in accordance with the original specification for the installation
to remain non-fragile.
|
