Colorbond Roofing Sydney

Choosing a profile

Classic corrugated suits period and suburban homes and is the most familiar look. Trapezoidal profiles carry water more efficiently and work at lower pitches, which suits modern flat-roofed extensions. Standing-seam and concealed-fix profiles remove exposed fixings altogether, which reduces the number of potential leak points at the cost of a higher price.

The right profile is usually decided by pitch first and appearance second — a profile used below its minimum pitch will leak no matter how well it is installed.

Colour and coastal exposure

Colour affects heat: lighter colours reflect more solar radiation and keep the roof space cooler, which is worth real money in Western Sydney summers. Darker colours look sharper on contemporary homes but run hotter.

Near the coast, standard coatings degrade faster in salt-laden air. For properties in the Eastern Suburbs, Northern Beaches and around Botany Bay and the Georges River, a marine-grade specification is worth the extra cost.

Rain noise and insulation

The most common complaint after a tile-to-metal conversion is rain noise. It is manageable — anticon blanket, sarking and adequate ceiling insulation together make a large difference — but it needs to be specified during the re-roof, not added afterwards.