A sealed, breathable envelope
Every external wall and roof plane is wrapped in a Proclima membrane, every join, lap, penetration and window reveal taped into one continuous air and weather barrier.
Learn more
Duplexes
Duplexes by Avern.
A duplex is two homes in one build, and both deserve the same standard. Avern builds residential and luxury duplexes with the same high performance methods we use on every home.
We completed a residential duplex in Denistone East in August 2024, and a new luxury duplex in Oatlands is under construction.
Built to the Avern standard
What goes into every build.
Concrete subfloors, not particleboard
Where a home is not on a slab we lay AlphaFloor 35 mm precast concrete panels. Rain on site cannot swell them, and they add thermal mass and quiet.
Learn moreStraight LVL wall framing
LVL replaces standard MGP pine in every wall frame. It stays straight and plumb, so the membrane and insulation stay continuous.
Learn moreDouble glazed, thermally broken windows
Our minimum on every project. We push for uPVC or timber frames, which do not run hot and cold the way aluminium does.
Learn moreProjects
Duplexes we have built.
Denistone East
Residential duplex. Completed August 2024.
View project
Oatlands
New luxury duplex. Under construction.
View projectYes. The Avern standard applies to the whole building: membrane, subfloor, framing, glazing and insulation.
The airtight envelope, insulation and, where used, AlphaFloor subfloors all cut sound transmission. We will talk through the separating walls for your design.
Yes. We offer initial consultations, complete tender submissions and general advice on construction and project management.
We are based at 159 Allen Street, Leichhardt, and build across Sydney, with projects in Point Piper, Abbotsford, Denistone East and Oatlands.
Start your project
Planning duplexes in Sydney?
Tell us about your site and plans. Whether it is a new home, a duplex or an addition, we will talk you through how we would build it.