Roof Ventilation
Thornlie
Owner-operated, fully insured, fixed prices from $350. No call-out fee.
Whirlybird Installation in Thornlie, Perth
Dave works right across Thornlie and the wider City of Gosnells. The suburb sits about 15km south-east of the Perth CBD — close enough that travel is always included in the quoted price, same as everywhere else in the metro.
Distance from the coast is the defining factor in Thornlie. At roughly 16km, the afternoon change is a weak, late arrival, while the heat load on the roof is higher than anywhere closer to the water.
Most of what Dave works on in Thornlie is 1970s brick and tile on generous blocks. Seventies homes are the bread and butter of this trade: broad single-storey footprints, tile roofs at a workable pitch, and enough ceiling area that two units almost never cuts it.
They also tend to be the easiest to get right, because the eaves are wide and properly vented. When intake is not the limiting factor, adding extraction produces the result you actually expect.
Far inland — light, late breeze
Why Thornlie Roofs Usually Want Solar
Thornlie is about as far from the coast as Dave works, and it shows up in two ways: summer roof temperatures run higher than on the coastal plain, and the wind is much less dependable. Those are the exact conditions where wind-driven whirlybirds disappoint people.
Solar vents are usually the better buy here. From $750 installed, a solar unit runs whenever there is sun on the panel — which out this way is most of the day, most of the summer — and shifts several times the air a turbine manages.
Whirlybirds still have a place in Thornlie as a cheap supplement, or on smaller homes where the ceiling area is modest. What Dave will not do is sell you five turbines for a roof that needs one powered unit.
Our Work
Recent Installations Near Thornlie
Services
Available in Thornlie
Roof Ventilation Assessment Perth
Not sure what you need? Send through your roof size, pitch, orientation and ceiling area and Dave will recommend the right setup — then give you a fixed price up front.
Learn more ›Whirlybird Installation Perth
Wind-driven roof ventilators that spin whenever the breeze is up — no power, no running costs. They flush superheated air out of your roof cavity and cut your summer cooling bills.
Learn more ›Whirly Bird Replacement Perth
Rusted, squealing, seized or storm-damaged whirly birds replaced from $350 installed. Old unit removed and taken away, new flashing fitted, same roof penetration reused.
Learn more ›"Called Monday, booked Tuesday, installed Wednesday. Super fast and the roof was left spotless. Our summer power bill has already dropped noticeably."
Fixed Pricing
Prices for Thornlie Homes
Same prices across the metro — travel to Thornlie 6108 is included in every quote.
| Service | Price (inc. GST) |
|---|---|
| Popular Whirlybird Installation (new) Unit + full installation included — tile, metal or Colorbond roof | From $350 |
| Each Additional Whirlybird 2 units $650, 3 units $950, and so on — installed same visit | +$300 |
| Whirlybird Replacement (swap) Remove old unit and install new — existing roof penetration reused | From $350 |
| Solar Vent Installation Per solar-powered ventilation unit, fully installed | From $750 |
| Roof Ventilation Quote Dave assesses your roof from your details — no charge, no obligation | FREE |
FAQ
Whirlybirds in Thornlie — Your Questions
Thornlie Questions
From $350 for a single unit supplied and installed. Two units are $650, three are $950, and each unit after that adds $300. Travel to Thornlie 6108 is included and there is no call-out fee.
Large single-storey footprints mean three to four units is typical rather than two. The general rule is one 300mm unit per 50–60m² of ceiling area, adjusted for pitch and how much intake venting the eaves provide. Dave works out the exact number from your details before quoting.
The unit, correct flashing for your roof type, cutting and fitting, removal and disposal of any old unit, full clean-up including metal swarf off the roof and out of the gutters, and travel to Thornlie. Nothing gets added afterwards.
Yes, and it is the benefit people forget. Warm moist air from inside the house rises into the roof cavity and condenses on cold surfaces overnight — that is where damp insulation and mould on the sarking come from. The same airflow that removes summer heat removes winter moisture.
As high as practical and spread across the roof rather than clustered — usually on the western or south-western slope so they catch the afternoon sea breeze. On a complex roofline with separate sections, units may need to go on more than one face to cover the whole cavity.
Not necessarily, though most people are. Dave will talk through placement before starting, and the job typically takes one to two hours. Access to the roof is all that is strictly needed.
Nearby
Also Servicing Suburbs Near Thornlie
Dave · Owner-Operator The Bloke On Your Roof
In Thornlie, You Deal With Dave Directly
Every job is quoted and installed by Dave himself, and has been for 10 plus years across the Perth metro. You will not be handed to a call centre or meet a crew you did not book.
- Fully insured, licensed tradesman
- The person who quotes is the person who installs
- All offcuts and swarf cleared off the roof
Free Quote
Get Your Free
Thornlie Whirlybird Quote
Fill in the form and Dave will get back to you with a fixed price — no call centres, no surprises. Owner-operated, Mon–Sat 7am–5pm.
Request a Quote in Thornlie
Dave will reply within a few hours on business days.