Adding a curve to a hallway or creating a circular feature wall is one of the best ways to make a project stand out. But for many builders and DIYers, the thought of bending a rigid sheet of plasterboard feels like a recipe for a snapped board and a wasted afternoon.
The good news? It’s actually straightforward if you have the right gear and know a couple of trade secrets.
What are the advantages of curved walls?
Curved walls improve the flow of a room, soften the interior aesthetic, and eliminate sharp corners in high-traffic areas.
Beyond the “wow factor,” curves are great for safety in busy homes and provide a high-end architectural finish that sets a property apart from cookie-cutter builds. They also help break up flat surfaces that bounce sound around, slightly improving the acoustic feel of a large open-plan space.
Are curved walls hard to build?
Curved walls are not hard to build, provided you use the correct framing techniques and a closer stud spacing of 300mm. The real work is in the framing. You’ll need flexible track for your top and bottom plates to get a perfect arc. Once the track is down, the studs must be placed closer together (300mm centers) to provide enough support for the board to stay smooth. If the framing is solid, hanging the board is just a matter of working slowly from one side to the other.
What is the best plasterboard to use for curved walls?
Siniat Curveshield Plasterboard
The best material for curved surfaces is specialized flexible plasterboard, which is thinner than standard plasterboard, usually 6mm or 6.5mm thick.
While standard wall sheets are 10mm or 13mm thick and quite stiff, flexible boards (often called “Flexi board”) are made with a reinforced core and tougher paper. This design allows them to bend into tight shapes without cracking. To get back to a standard wall thickness, most builders simply “double-sheet” the curve, installing two layers of 6mm board on top of each other.
How much can plasterboard bend?
A specialized 6.5mm plasterboard can bend to a radius as tight as 250mm when wet, or roughly 600mm when dry.
Standard 10mm plasterboard is far stiffer and can only handle very gradual, sweeping curves (usually a radius of 3000mm or more). If you try to push standard board too far, it will either snap or “facet,” creating a series of flat edges rather than a smooth curve. For anything tighter than a gentle arc, you need a dedicated flexible board.
How do you get a smooth curve without snapping the board?
To get a perfect curve, you need to space your studs closer together (usually 300mm apart) and fasten the board slowly from one side to the other.
Here are the three main tricks used on-site:
The Dry Bend: For most curves, you simply push the flexible board against the studs and screw it in as you go. Start at one end and work your way across so the tension stays even.
The Wet Bend: If the curve is extremely tight, you can lightly mist the back of the board with water. This “softens” the core and makes it much more pliable. Just let it dry completely before you start your jointing and painting.
Vertical vs. Horizontal: Always install the sheets horizontally (long edges across the studs) if you want the tightest possible bend.
Recommended Products
To get a professional, crack-free finish, we recommend these industry-standard materials:
Siniat Curveshield Plasterboard: A premium 6mm board specifically engineered for tight radii in both walls and ceilings.
Higgins Insulation: Curved cavities still need thermal and acoustic protection; Higgins offers flexible batts that tuck easily into non-standard wall shapes.
Flexible Steel Track: The easiest way to create perfect top and bottom plates without having to cut timber arcs by hand.
Get Your Supplies Delivered Fast
Don’t let a tricky design slow down your project. At Building Supplies Australia Network, we deliver the widest range of quality construction materials straight to your site. We service all major cities, including Adelaide, Brisbane, Melbourne, and Sydney. Ready to get started? Order online today or request a quote for your project.