Kerfing MDF to bend.

[Tigercubrider]

I am working on my stairs and the bottom step is a bullnose (90° bend)
Ideally I would use 18mm MDF as that gives me a spacer of the right size for the upstand.
I could use thinner then pack it out.

I have access to track saws and a chop saw.

How do you determine the area to kerf ? Bend a bit of card to calculate the rough area?
How big a kerf would be needed ?
Maybe a series of chop sawed slots and then remove every other surviving bit of wood?
I can experiment but need to have an idea where to start

TIA

 

[blup]

Consider gluing up thinner sections ofboard

 

[DAZB]

They sell the bendy MDF all over the place now...

Flexible MDF Fibreboard (L)1220mm (W)607mm (T)6mm

A medium density fibreboard with pre-cut grooves which allow the easy creation of frameless curved structures.

www.diy.com

 

[hllns]

The flexi stuff is great, used it for some set we were building to do some arches

 

[freddiemercurystwin]

I did something similar but for plywood, for a kids project, so I had to only use materials I already had, but if I was doing something for the house I would have paid up for the right thing.

 

[Tigercubrider]

Thanks
I can buy bendy MDF - I just need to pack it out to somewhere near 18-22mm so could do it in stages.

 

[foxhole]

Thanks
I can buy bendy MDF - I just need to pack it out to somewhere near 18-22mm so could do it in stages.

Use three layers.