Lay the next sheet of decking over the previous sheet’s side
lap (Figure 6.1). At the back channel end press down on the
lap until the sheets clip together, continue working along the
length of the sheet using a timber block (to avoid damaging
the sheet) and rubber mallet. Finish by sliding the roof sheet
firmly into the BIP foam on the back channel. For larger
spans you may need to temporarily support the underside of
the roof sheeting while clipping the laps together. Continue
this process until all the roof decking is installed.
DECKING PARALLEL TO BACK CHANNEL
If the decking runs parallel to the back channel, slide the first
roof sheet sideways into the BIP foam in the back channel
for a weather proof seal. The sheeting is secured to the
back channel with rivets at 200mm centres (150mm centres
for cyclonic conditions), and it is secured to the beams
running parallel with the decking using hex head screws at
500mm centres. The roof sheets are fixed as standard to the
supporting beams (Figure 6.2).
OUTBACK ROOFLITE
TM
INSTALLATION
An Outback Rooflite can be used to add natural light. The
polycarbonate Rooflite overlaps the deck by snapping or
sliding over the already installed sheets that have been
spaced 250mm apart. Note: the profile of the Rooflite is
different on each side, and therefore must align with the
correct connection on the deck (Figure 7.0).
Ensure the lower tab of the Rooflite touches the Outback
deck at the points shown (Figure 7.0) and all sheeting is
pushed firmly into the back channel. 9mm holes must
be pre-drilled through the Rooflite at all of the fastener
locations prior to fixing to allow for thermal expansion. The
Rooflite is fastened using 12x20mm hex head self-drilling
screws with domed washers at maximum 2000mm centres.
Fix through the groove located along the top of the Rooflite
connectors (Figure 7.1).
To finish the exposed end of the Rooflite an infill is required.
Fasten the infill over the Rooflite with 12x20mm screws and
domed washers on both sides through the pre-drilled holes.
Connect the infill to the underside of the decking with 3mm
rivets, seal the rivets with silicone. Finally, a foam insert is
placed into the back channel end of the Rooflite.
Back Channel
3.8mm Rivet through
Back Channel
Decking
FIGURE 6.2
FIGURE 6.3
12x20 Hex Head Screws
3.8mm Rivets
FRONT FASCIA BEAM SCREW LOCATIONS
BACK CHANNEL RIVET LOCATIONS
250mm
Outback Deck
Dip in the
profile
No dip in
the profile
Outback Deck
Note: each side of the profile is different, and
fits with the corresponding edge on the deck
FIGURE 7.0
Back Channel
12x20mm Hex Head Self Drilling
Screws with Domed Washers
Outback Deck
Outback Deck
Outback Rooflite
Rooflite Infill
Foam Insert
3mm Rivets
FIGURE 7.1
