Whirlybird Installation
Como

Como Whirlybird Installation and Replacement

Como 6152 sits about 6km south of the Perth CBD, in the City of South Perth. Dave installs and replaces whirlybirds and solar roof vents throughout the suburb — fixed prices, no subcontractors, travel included.

Como sits about 12km back from the coast. The sea breeze does reach here — it just reaches here after the worst of the day's heat has already built up in your roof, which is the crux of the whirlybird-versus-solar decision locally.

Como is largely post-war brick and tile. Post-war brick-and-tile homes typically run a low-to-medium pitch with a modest eave overhang. Roof cavities are shallow, which means they heat up fast and transfer that heat down to the ceiling quickly.

Insulation in these houses is frequently original, thin, or has settled and gone patchy over decades. Ventilation will not fix poor insulation, but it does stop the cavity above it acting as a heat store all evening — which is usually the complaint that prompts the call.

Inland — late afternoon breeze

Why Solar Vents Often Win in Como

This is where the advice changes. In Como 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 Como 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.