How to install a cavity unit

Have you ever tried to install a cavity unit?
We can do the hard work for you.

: Fittings supplied

• Head Track
• Timber Pelmet cover trims
• Fitting Pack
• Cavity Pocket
• Closing Jamb (VIC, SA, TAS, WA only)

2. Measure your opening

Measure your stud opening (insert image #1) allow 5mm minimum in both height and width. This will allow for the unit to be packed square during installation. Use these measurements to purchase your new Hume cavity.
Height = Door Height + 70mm (QLD, VIC, SA, TAS, WA) Height = Door Height + 80mm (NSW, ACT) Width = 2 x Door Width + 10mm – Flush Pull (Door protrudes 50mm) Width = 2 x Door Width + 60mm – Flush Jamb (Door is flush with split jamb)

3. Remove transport plates

Remove both transport plates from the top of the cavity. Fit and screw steel head/track to the top of the cavity unit.

4. Fit closing jamb to head/track

Fit closing jamb to head/track. (Not supplied QLD, NSW, WA, ACT)

5. Place cavity unit in opening

Stand assembled cavity unit into your opening, ensure unit is level, pack behind then fix through back post of the cavity unit into the house frame. Make sure the split jambs are in line with the house frame and fix the unit to the floor. (pack under cavity for additional clearance under the door - only if required)

6. Fix head track to frame

Ensure split jambs and head/track are plumb and level, then fix the head to the house frame.

7. Make sure closing jamb is plumb

Plumb closing jamb, pack and fix through to the house frame.

8. Cavity fittings pack includes

• 2 x 4 Wheel Roller Assemblies
• L/H & R/H Door Guides
• 2 x Quick Release Base Plates
• Assorted Screws
• Adjusting Spanner
• Rubber Bumper Stopper (QLD only)

9. Fit 4 wheel roller cariages into head track

Place both 4 wheel roller carriages into the track and ensure they both operate well.

10. Door Preparation

Check that the door is straight and free of any imperfections. Seal your door top & bottom with two coats of undercoat and 2 coats of paint. Refer to manufacturer's warranty.

11. Attach the base plates

Attach the base plates on the top edge of the door, 80mm from each end. Ensure the nylon lock tabs are both on the same side of the door.

12. Fit clad to opening

Clad your opening (Not included) - Important - At this stage make sure the temporary spacer block and plate (located in between the split jambs, approximately half way up from the bottom) remain in place during cladding and tiling to prevent distortion of the cavity pocket. Remove after cladding and prior to the door installation.

13. Fit the architraves. (Not included)

14. Slide the carriage pin into the base plate

Check the opening is free from obstructions, slide the door into the cavity, lift door and slide the carriage pin into the base plate. Then lock with the tab and repeat this process for the second wheel carriage.

15. Fit the cavity door guides

Fasten the door guides at the bottom of the split jamb. Ensure the slide adjustment part of the guide is on the outside of the opening. Check the door slides evenly and smoothly.

16. Adjust the height of the wheel carriage

Using the adjusting spanner, adjust the height of the wheel carriage and plumb against closing jamb.

17. Cut timber cover trims

Cut the timber cover trims to the desired length, fix with screws provided.

18. Fit screw covers

Fit all the screw covers to the timber pelmet cover trims.

Final check

Check your door operates correctly and revisit any of the steps if required.