Three ways to install.

Before you start

Tools you'll need: Cordless drill with metal bits (5mm and 10mm), spirit level, pencil, M8 socket wrench, silicone sealant, two adults (the box is 20kg).

Time: 45–60 minutes for an able DIYer.

Procedure

1. Mark the four mounting holes on the fence using the supplied template. The bottom of the letterbox should sit at ~1.05m above ground level — comfortable for a postal worker without bending.
2. Drill pilot holes through the fence material. Use a 5mm bit for timber, 5mm pilot then 10mm clearance for steel posts.
3. Have a second person hold the box in position. Pass the M8 coach bolts through the box's rear flange and the fence.
4. Add the backing plate on the rear side. Tighten the nuts onto the backing plate, not directly onto the fence — this distributes load and prevents the bolts pulling through over time.
5. Run a thin bead of neutral-cure silicone around the top edge where the box meets the fence to prevent water tracking down behind it.
6. Open and close the door a few times to confirm clearance. The lock should engage smoothly without forcing.

Brighton · brick-in

Brighton is best installed as part of a new pillar build. The bricklayer leaves a rectangular cavity 380mm wide × 470mm tall, and your box slides in flush from the front. The rear is sealed with brick or rendered cement.

For retrofits, you'll need to chase out an existing pillar — a job for a qualified bricklayer. The opening should be 380 × 470 × 480mm minimum.

The optional combination lock is fitted at our workshop, not on site. Specify at order.

Mosman · freestanding

Mosman requires a poured concrete base. We recommend:

• Pad size: 600 × 600 × 200mm minimum.
• Reinforced with F62 mesh.
• Four M12 chemical anchors set to the supplied template before the box is fitted.
• Allow 7 days cure before bolting the box down.

If you're handing this to a landscaper, send them the dimensioned drawing — we'll email it on request.