Suspended plasterboard ceilings across the Illawarra

Yes, and how far it drops decides how it is built. Up to 200mm, the ceiling is furring channel snapped into adjustable clips fixed to the structure above, which is quick and relatively cheap. Past 200mm it becomes a properly suspended system, hung on rods with a two tier grid. The space above it can run out to about 2m, and both give the same flat set ceiling underneath. They are different jobs with different components, so the first thing we establish is which side of that line you are on.

A normal ceiling is fixed straight to the joists or battens that are already there, so it follows whatever shape the building gives it. A suspended ceiling hangs below the structure on rods and a grid, set to a laser datum. That makes it flat regardless of what the structure above it is doing. That is why it can level an old building, hide services, and lower a room to a chosen height. It is also the only plastering element with an Australian design and installation standard written specifically for it.

Yes. A continuous ceiling takes a control joint at no more than 12m in each direction. It also takes one wherever the framing type or direction changes, and where the ceiling meets a different assembly. The useful part is that the manufacturer allows them to be positioned to intersect light fittings, vents and air diffusers. On a well planned ceiling that means the joints land in the service layout. They effectively disappear, rather than running across an otherwise clean plane.

Yes. The grid components are manufactured in custom radiuses and special lengths, and swivel connections handle the junctions where two planes meet at an angle. That means a curved or vaulted ceiling is built to a real geometry rather than approximated. The work is mostly set out rather than lining, and the set out is where the time goes. We price this kind of ceiling on the shape rather than the square metre.

Yes. The NSW licence class for this trade names false and suspended ceilings in its own definition, alongside cornices. A hung ceiling sits squarely inside the trade rather than at the edge of it. That is worth knowing here more than on a flat ceiling. A suspended ceiling is a hung structure carrying its own weight and whatever sits above it. None of that structure is visible once the board goes on. Ask to see a licence before anybody starts hanging steel off your building.

No, not an internal one. The manufacturer warns that internal suspension components may not be suitable for external ceilings, even with down struts. Wind pressure on an outdoor ceiling can act upwards as well as downwards, and it can be similar to the pressure on a wall. An outdoor ceiling is a different specification with different fixings, different joint spacing and a different paint system. We do that work as patio and alfresco ceiling lining rather than as a suspended ceiling.

From your plans, because a suspended ceiling is priced on the finished ceiling level and the depth of the space above it. The third thing is what has to fit in that space. None of those three read off a photograph the way a wall repair does, and plans give all of them at once. Where there are no plans we will come out and measure instead, and the quote is free either way. Suspended ceilings and commercial work are the two jobs we will not price from a photograph.