Fix your first edge bar as shown in the diagram. Remove the rubber gasket from the bar and slide the edge fillet up the groove on the bar. Then, cut the bar to the required length.

Key Measurements:

• Allow for 50mm overhang into the guttering
• Cut aluminium base 2mm longer than the intended polycarbonate sheet length
• This allows the end cap to be fitted later

Drill and fix the bar into position with screws at 300-400mm centers. Ensure the drip on the edge trim is positioned correctly and neat from the external view. Repeat on the opposite end.

You have several options for sheet layout:

• Cut all sheets to space them out evenly
• Work towards a cut sheet in the middle
• Use full-width sheets and cut the two outer sheets to size

Once you have decided on your layout, start fixing the centre bars in your required positions. Drill and fix the bars with screws at 300-400mm centers.

Ensure all the rubber gaskets in the bars are flat with no bumps. This is crucial for proper sealing and placement of the sheet.

Cut your polycarbonate sheets to length if they have not already been done, ensuring that all swarf (cutting debris) is removed.

Anti-Dust Tape Application:

• Use solid foil tape on the top of the sheet
• Use vented tape on the bottom of the sheet
• Peel the backing tape and stick in place as shown

Now peel about 50mm of the protective film down both sides and place the sheet on top of the two aluminium roof bars.

Position PVCU caps so that the toothed legs are located inside the centre of the aluminium base. Press down firmly, then lightly hammer down with a rubber mallet or equivalent until the caps lock into place.

As you work across the roof, complete the flashing as you go. Remove the protective covering when the flashing is complete and all caps are in place.

Fit the end caps into place. Cut sheet closures to the length between bars and push them in place as shown.