Roof Ventilation
Leeming

Leeming Whirlybird Installation and Replacement

Leeming 6149 sits about 15km south of the Perth CBD, in the City of Melville. Dave installs and replaces whirlybirds and solar roof vents throughout the suburb — fixed prices, no subcontractors, travel included.

Leeming is far enough inland — about 9km — that the sea breeze is a softer, later arrival. Wind-driven units are not useless here, but they are working fewer effective hours than the same units bolted to a roof on the coast.

The roof stock in Leeming is mainly 1980s brick and tile. 1980s homes tend toward larger floor plans and slightly higher pitches than the decade before, with roof cavities to match. Ceiling areas of 180–250m² are common, which puts most of them in the three-to-four unit range.

Eave venting is usually present but sometimes minimal. Where it is tight, adding eave vents alongside the roof units delivers a better result than simply bolting on more extraction.

Inland — late afternoon breeze

Why Solar Vents Often Win in Leeming

This is where the advice changes. In Leeming the sea breeze arrives late enough that wind-driven turbines miss the worst of the heat — your roof cavity peaks in the early afternoon, and the Doctor often does not turn up until after that.

A solar vent runs on sunlight instead, so it is at full output precisely when the roof is hottest. One unit at $750 typically moves more air than three turbines at $950, and it does not care whether the wind is blowing.

That said, plenty of Leeming homes do perfectly well on whirlybirds alone — particularly smaller single-storey places with well-vented eaves. A common middle path here is one solar vent doing the heavy lifting plus a couple of turbines contributing whenever the breeze is up. Dave will tell you which of the three makes sense for your roof rather than defaulting to the dearest option.