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Megadek a major
development of
the system is to
bring the
product to the
construction
site to minimize
the number of
joints required
on a roof. It’s
have developed
the system to
offer complete
design flexibly
to the client.
The strong
emphasis placed
on innovation,
customer
services and
quality, has
enabled the
product to build
and maintain on
impressive
client
portfolio.
It is economical
to use due to
its great
spanning
capability over
other profiles
and as such it
helps to reduce
steel Purlin
cost.
Furthermore, it
offers much more
superior
protection
against leakage,
particularly in
places with
heavy rainfall,
a typical
characteristic
of the Malaysian
climate.
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Metal Roofing
Solution |
Profile Specification
Recommended Maximum
Support Spacing
LENGTHS
All products are
available from, DURO
Distributors in lengths
up to 21 metres
custom-cut to your
length requirements.
Lengths longer than 21
metres can be supplied,
provided satisfactory
transport and on-site
handling can be
arranged.
TOLERANCES
Length: +0, - 15mm
Cover width: +4mm, -4mm
PACKING
Sheets are packed in
strapped bundles of one
tonne maximum mass
MINIMUM ROOF SLOPE
The normal recommended
minimum roof slope is 1
in 20 (approximately 30)
However, in non-cyclonic
areas where roofs are in
single sheet lengths,
with a run of less than
15 metres, a minimum
roof slope of 1 in 30
(approximately 20) may
be used. For recommended
slope of roofs in
cyclonic areas, please
consult our DURO
Distributor’s Office.
INSTALLATION
Fastening sheets to
supports
MEGADEK is flexible in
that it can be
pierced-fixed to either
steel or timber
supports. This allows
fastener
screws to either pass
through the sheeting or
through the crests or in
the valleys.
Crest or valley fixing
is best used for walling
purposes. However,
maximize on water
tightness, it is best
to place roof screws
through the crest.
Always drive the screws
in the centre of the
corrugation or rib and
at the square angles to
the sheeting. It is
important to note
fasteners should not be
placed less than 25mm
from the ends of sheets.
Side-laps
There is always an under
lap at the edge of
MEGADEK anti capillary
groove. For better
results, use fasteners
along side-laps,
however, note that when
cladding is supported as
indicated in maximum
support spacing.
Side-lap fasteners are
not usually needed for
strength.
End-laps
Due to MEGADEK
availability in long
lengths, End Laps are
usually not necessary.
However, if you want
end-laps and would like
to know the sequence of
laying and the amount of
overlap, please call
your nearest DURO
Distributor.
Ends Of Sheets
It is most common to
allow roof sheet to
overlap into gutters by
about 50mm. In extreme
weather, or if the roof
pitch is less than 25
degree, the valleys of
the sheets should be
turned up at upper ends
by about 80 degree and
turned down at lower
ends.
Lay Sheets Toward
Prevailing Weather
Turning sheets on the
ground is always easier
and safer. Always check
that sheets are the
correct way up and that
the correct way up and
that the overlapping
side is towards the edge
of the roof before you
start installation.
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