A concrete tile roof can last fifty years or more, but only when it is installed correctly. The tiles get most of the attention, yet the layers beneath them do the real work. Getting the sequence right is what separates a watertight roof from one that leaks within years.

This guide walks through the proper process, step by step. It is written for homeowners who want to understand what a quality new roof installation actually involves. Knowing the stages helps you judge whether the job is being done well.

Step 1: Check the Roof Structure First

Every installation begins below the tiles. The roof frame must be sound and strong enough to carry the load.

Concrete tiles are heavy, so the trusses and rafters need to be designed to support them. An installer checks the timber for rot, spacing, and correct pitch. If the frame is weak, that gets fixed before anything else goes on. Skipping this stage risks a sagging roof later.

Step 2: Install the Sarking

Sarking is the pliable foil membrane laid over the rafters when applying concrete roof tiles in Melbourne. It sits directly beneath the battens and tiles.

This layer does several jobs at once:

  • Acts as a second barrier that directs any water to the gutter
  • Reflects radiant heat to keep the home cooler
  • Blocks dust, draughts, and wind-driven rain

Under the Building Code of Australia, sarking is mandatory for tiled roofs with rafter runs of six metres or more. It is laid with the reflective side facing down. This membrane is a core part of any reliable concrete roofing system.

Step 3: Fix the Battens Correctly

The battens are the timber strips that hold the tiles in place. Correct roof battens installation is one of the most precise parts of the job.

Battens run horizontally across the rafters. Their spacing, known as the gauge, must match the tile manufacturer's specification exactly. Even small errors cause tiles to sit wrong and let water in. Installers use string lines and a gauge block to keep every batten straight and evenly spaced.

At low pitches, an anti-ponding board is fitted near the eaves. This stops water from pooling at the bottom of the run during heavy rain.

Step 4: Prepare the Flashings and Valleys

Flashings seal the joints where the roof meets other surfaces. These are the points where most leaks begin.

Careful roof flashing installation covers chimneys, vents, walls, and skylights. Valleys, where two roof faces meet, are lined with corrosion-resistant metal. Water is channelled safely toward the gutters at every junction. Getting these details right protects the whole roof from hidden water damage.

Step 5: Set Out and Lay the Tiles

With the base prepared, the tiles can go on. This stage is the visible heart of the concrete tile roof installation.

The installer sets out the tiles to ensure even coursing across the roof. Concrete tiles allow a variable headlap, which helps them fit without cutting the top row. Tiles start at the eaves and work up toward the ridge. Each one overlaps the one below to shed water downward.

Proper roof tile installation also means fixing tiles securely against wind uplift. Tiles along the edges, hips, and ridges need clips or nails. These perimeter zones are subject to the highest wind pressure.

Step 6: Bed and Point the Ridge Caps

The ridge and hip caps finish the roof and seal its highest joins. They sit on a bed of mortar for support.

A flexible pointing compound is then applied over that bedding. This flexibility lets the roof expand and contract without cracking. Rigid cement alone tends to fail within a few years. Quality tile roof installation always uses flexible pointing at this stage.

Step 7: Plan for Ventilation

A roof needs to breathe to perform well over time. Good roof ventilation planning prevents heat and moisture from building up in the cavity.

Trapped moisture leads to mould, timber rot, and higher energy bills. Ridge vents, eave vents, or whirlybirds keep air moving through the space. This simple step protects both the structure and your comfort. It is easy to overlook, yet it matters for the long term.

Build It Right From the First Tile

A concrete tile roof rewards careful, correct installation. Every layer, from the sarking to the ridge caps, plays its part. Cutting corners on any stage shortens the life of the whole roof.

If you are planning a new roof installation with concrete tiles in Melbourne, expert workmanship is worth every dollar. Camberwell Roofing installs quality concrete tile roofing across the city, backed by decades of experience. Book a consultation today and start your project the right way with a professional new roof installation designed for long-term performance and durability.