What you will need?
Utility knife
Drill
Plaster
Plaster or filler, depending on how much you plan to use.
Sanding paper, sanding block.
Sharp scissors
A bit of prior information: A packer is an item we will provide if you need to lengthen the cross beams. You will receive them depending on the depth of your Jamb. Dont stress too much. We will do the calculations and provide them to you. More information here about what a Jamb is.
Measuring your wall.
Curved Door Arch Installation Guide
1. Safety First
- Check for electrical wiring, plumbing, or services inside the wall before drilling or cutting.
- You can use a stud finder or detector to avoid hazards.
2. Prepare Timber Supports
Measure the distance between the stickers. This will ensure the corner has enough room for both the plaster and the wedge. This distance between the wedges and the corner timber sticker will be the spacing you use for the wooden supports. One more thing before you install the timber Supports
Ensure you leave 4mm between the edge of the plywood and the corner of the jamb (both sides) and an additional 1-2 mm for plaster/gyprock (Leave an additional 10mm after if you want to put on the plasterboard on the arch, however plaster should do.
Fix 6 timber supports into each corner of the wall, allowing for this distance.
Position the timber panels in an L-shape, with the long edge running vertically
3. Assemble the frame.
Once the 6 wooden supports are up, it's easier to assemble as much of the arch as possible with two feet on the ground first.
This white strip we have attached is to ensure you have the room for the 1.2 cm plaster to be flush with the edge of the arch. Don’t infringe on this when installing the beams so you have enough room for the plaster.
Packers (Ignore if you don't have Packers).
First, install the custom-sized packers to lengthen the beams to fit the wall width of the jamb. Remember to fit them over the hole.
Then place the wood into the packer, matching the hole. It might be easier to partly drill the screw in so you can thread it slowly through each hole.
If You Do Have No Packers.
3. Hold the other end of the beam securely as you drill each beam into the predrilled holes of the ply.
4. Do this with both sides.
4. Prepare the Plasterboard
- Mark the arch shape onto the plasterboard.
- Example:
- For a 350 mm curve and 95 mm width, transfer these dimensions accurately. You can use a string to measure the curve.
- Use a utility knife to cut along the outline.
- Score the plasterboard first, then snap, so they are attached only by one side.
5. Fix the Plasterboard
Ensure it's flush with the timber arches.
It may be easier to make a small pilot hole from the back first. When you turn the arch over, the pilot hole will indicate where the timber stud is, so you know where to drill through the plasterboard to install your screw.
Alternatively, you can drill from the front; whichever method you choose, ensure you leave 30mm clearance on each side.
Just now, only fix it to the 3 beams with two screws on each beam.
6. Installing it on the wall.
Install the corner of the plywood to the corner support first (2 screws).
Then attach the edges to the two wedge corner supports. After this, screw the plasterboard into both support wedges. You only need one screw per support wedge.
For more information about installing the transition pieces click here.
6. Finishing
- Apply plaster or wallpaper to smooth all joints and edges
I use fiber mesh tape and apply it all over the arch. First, apply the plaster compound, then place the Fiber mesh on top. 
Altneratively you can buy a plaster arch bead from Bunnings
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