1. Ceiling position

Select the desired location on the ceiling for the diffuser ensuring that the tube’s path to the roof will be free of obstacles such as joists, pipes, wires, etc. Check also that the roof flashing fits in the desired location.

Ideally, the tubing should run as straight as possible between the roof and the ceiling, but pitched roofs, attic obstructions and diffuser location can make this difficult. This is where adjustable angle adapters will help. They allow you to adjust the top and bottom tubes to the degree necessary to allow easy connection between the roof and the ceiling.

Now carefully cut a hole in the ceiling, checking the installation instructions for the appropriate diameter of the hole required.

2. Insert into ceiling

Now take the bottom tube components and insert into the ceiling hole. The bottom tube should point towards your selected roof flashing location. If it doesn’t, you will need to turn the angle adjuster to the appropriate degree so that it does point the right way.

3. Marking your roof point

Now select the point on the roof where the flashing and dome are to be fitted by pushing a screwdriver, or similar, through the roofing felt.

4. Preparing the roof

Locate your marker and remove sufficient tiles to allow you to place the top and aperture of the flashing onto the roof battens, leaving sufficient tiles at the bottom edge to allow the flashing to overlap sufficiently onto the tiles below. Double-check that no rafters or obstructions lie behind the proposed tube position. Using the flashing as a template, draw around the inside circumference of the turret onto the roof felt

5. Cutting the hole

Place the flashing to one side. Cutting obstructing battens if necessary, cut the roof felt in a star shape so the felt can be folded upwards and back on itself. Replace the flashing over the hole and temporarily insert top tube into the turret to check clearance and to angle the tube towards the bottom tube assembly in the ceiling.

6. Fitting the flashing

Secure the top of the flashing to the roof battens using the screws provided. Nails can be used if you prefer.

7. Shaping the flashing

Apply hand-pressure to form the bottom edge of the flashing over the shape of the tiles beneath it. Turn up the left and right edges of the flashing to ensure water cannot ingress.

8. Fit the brackets

Fix the aluminium ‘L’ brackets to secure the exposed lower end of the flashing to the tiles (refer to the instructions supplied with the ‘L’ brackets).

9. Fixing the brackets

Screw the brackets into place using the screws provided.

10. Finishing the roof

Replace and secure the removed tiles, ensuring a 40mm gap is left behind the turret upstand to allow the top tube assembly, dome ring and dome to be inserted into the flashing upstand – note, you may need to trim the tiles to achieve this. Mould the top of the flashing as necessary to fit the underside shape of the tiles. Ensure all tiles are firmly in position and the roof is fully watertight.

11. Fitting the attic seal

Take the thicker of the foam strips provided and insert along the under side of the dome ring. Cut off excess foam as required.

12. Inserting the tube

Insert the top tube assembly into the roof flashing from the outside. For metal roof flashings that have pre-drilled holes ensure the dome ring screw holes are aligned with these pre-drilled holes. Non-metal flashings do not have pre-drilled holes.

Manually screw one dome screw into the flashing through a pre-drilled hole in the metal flashing or directly into a non-metal flashing to hold the top tube assembly temporarily in place.

If necessary, rotate the angle adaptor so that the top tube assembly points towards the bottom tube assembly in the ceiling.

13. Taping the top tube

Unscrew the holding dome screw and remove the top tube assembly from the roof flashing. Tape the angle adaptor joint and tube seams of the top tube assembly with the foil tape provided.

14. Remove the protective film

Remove the protective lining film from the inside of the tube and place the top tube assembly back into the roof flashing, aligning it again with the bottom tube assembly. Securely fasten the top tube assembly to the flashing with the dome screws provided (into the pre-drilled holes in metal flashings or directly into the upstand of non-metal flashings).

Remove protective film immediately – under no circumstances should the protective film be left once the system is exposed to sunlight as it may bond to the inside of the tube.

15. Fitting the LightTracker™

Using a magnetic compass if necessary, position the LightTracker™ dome reflector in the north side of the dome, with the reflective side facing due south. Align the holes in the reflector with the tabs inside the dome and snap into place. Peel the protective film from the reflector.

16. Inserting the weep seal

Insert the weep seal along the dome ring gutter. Ensure seal does not twist during application. Cut of excess as required.

17. Fitting the dome

Keeping the LightTracker™ on the north side of the dome facing south, align the four tabs on the dome base with the snaps on the dome ring and press down firmly to click into place. Check to make sure the snaps are fully engaged.

18. Extension tubes

Remove the protective liner from the extension tube(s) before assembly. Extension tubes have deep and shallow notches at each end so that they may be formed into slightly tapered tubes. Weave one end of the tube through a deep notch, the other end through a shallow notch, ensuring the tube is also held in the centre notch. Tape the tube seam with a short piece of foil tape at either end to hold the joints temporarily in position. The smaller diameter tube end should always point towards the bottom tube assembly.

Assemble all the required extension tubes, telescoping them together to provide the total length of tube required and remembering to allow at least 50mm overlap at each join. At this stage, use small pieces of foil tape to hold the tubes together. Check that the assembled tube length is correct by holding the extension tube(s) alongside the top and bottom tube assemblies. Adjust the tube length as necessary.

19. Applying the expansion seal

For short installations with no extension tubes the expansion joint seal is applied 25mm from the top edge of the bottom tube assembly. For installations using extension tubes, the expansion joint seal is applied 25mm from the top edge of the uppermost extension tube.

The expansion joint seal should be applied to the outside diameter of the tube in the following manner:

Remove the backing strip from the expansion joint seal and adhere it 25mm from the top edge of the tube. The seal should wrap twice around the tube, not overlapping but butting up closely.

20. Installing the bottom tube assembly

If any angle adjustment is required to the bottom tube assembly to align it with the top tube assembly this should be done now; use a crosshead screwdriver to loosen the twist-lock fastening clamps. Remove the assembly from the ceiling, and rotate the angle adaptor if necessary to ensure alignment with the top tube assembly.

21. Finishing the bottom tube

For installations with extension tubes, remove the protective film from the inside of the bottom tube assembly and all other tubing if not already done so. Re-insert the bottom tube assembly and then lock all twist-lock fastening clamps into the ceiling.

22. Joining the sections

Insert the extension tube with the expansion joint seal  up into the top tube assembly. Then insert the other end into the bottom tube assembly. Ensure there is a minimum 50mm overlap at either end. Tape all joints together and use self tapping screws for additional rigidity if necessary.

23. Align the diffuser to the bottom tube assembly

Apply firm upward pressure on the white dress ring of the diffuser until it ‘snap fits’ into position, taking care not to push on the central diffusing area. The diffuser is held in place by a rubber sealing ring in the bottom tube assembly and can be removed if required by pulling down on the outside of the white dress ring until it ‘snaps’ free.