Scribing quadrant

[ChilliBob]

Hey guys,

I need to install some 12mm quarant/quarter round in a small room with wooden floor. I have looked and it seems best practice is to scribe internal joints and mitre external ones. All mine are internal, so scribing it is!

I haven't scribed before but I'm up for giving it a go. I tried to watch some Youtube videos but the guy seemed to have an opposing piece of wood (so an 'inverse' quarter round if you get me) to get himself a radius. This isn't a luxury I have...

So I cut a standard 45 degree as if I was going to mitre...
Then I need to get the profile of the installed quadrant - I tried just 'free hand sketching it' by eye, but it wasn't very successful.

Any other tips? - can I use a compass somehow?! Could I use a flexi curve from a technical drawing kit? Do you just do it by eye?!

I'm doing this with a spare bit now - as it's extremely unlikely to work first time, of course!

Tips - or links to good videos welcome!

On and when I get to the door - how would you finish it?- straight 90 degree cut? or try to 'round it off' so to speak?

Cheers!

 

[foxhole]

12mm is a little on the small side for edging flooring 18mm+ would be better, which is why you are struggling to scribe. If you use the 12 then just mitre.At door frame 12mm should be small enough to butt join architrave.​

 

[ChilliBob]

Oh and this was the video:

 

[ChilliBob]

I didn't want it to actually be much of a 'feature' tbh - I just wanted something to cover a gap under the window - so the smallest I could get away with - plus it's a very small room - I brought a selection of short lengths and the 16 or 18 mm were a bit big for the dinky room.

Problem at the moment that I've practically fitted one piece under the window flush at both ends (bending in quite a horrible way to get round the radiator )

 

[foxhole]

The video looks like 25mm , you can use a drill with sander bit but to push on the back of the quad to make a nice scribe rather than cutting.

 

[crank39]

For something that small i wouldnt bother scribing, us pvc fitters use gasket shears or snips like these, easily cut through 19mm quad

 

[ChilliBob]

Well I sorted it... Using a dremmel of all things. Just trial and error in the garden with a spare bit of quadrant nailed to an old bit of floorboard.

Unconventional but seems to have worked!