A successful polycarbonate installation must satisfy load conditions,
remain weathertight at all times and have one fixed point from which
there can be unrestricted thermal movement in length and width.
The
UV protected surface of Marlon ST is covered at manufacture with a
branded film. This should always be on the outside of the installation.
A further plain film is applied to the inner surface.
To install, the films should be peeled back about 50mm to allow clean
sheet insertion into the glazing system and application of end tapes
and closure.
Both films should be left in place for protection of the sheet until
project hand over, particularly when there are following trades and
then they can be removed. If the project is likely to take time to
complete, regularly check that the film does not bond on to the sheet,
particularly in sunny weather.
It is essential to prevent ingress of moisture, dust and insects by
applying the appropriate tapes, closure and sealant.
Sheets must not
be fixed or clamped too tightly as this will prevent thermal expansion
and contraction and will adversely affect the installation.
At the eaves
purlin of the structure and generally when the structure is located
in a windy area, additional fixing is necessary. Cladding buttons
are used for this purpose. Drill a hole through the sheet at the appropriate
position and screw down the cladding button until it can just be turned
by hand. Do not overtighten. Holes for cladding buttons should be
18mm in diameter at the eaves.
The maximum overhang
of the end of the sheet should be 50-60mm. This will ensure proper
run off of rainwater into the gutter.
The
UV protected surface of Marlon ST is covered at manufacture with a
branded film. This should always be on the outside of the installation.
A further plain film is applied to the inner surface. 
