Hello all knowledgeable folks.

Recently bought a house with a straight indoor staircase in lacquered pine. It has now been sanded and is ready for painting.

The problem lies in the treads where there used to be some disgusting, ugly felt carpet. Glued. Removing all the glue residue feels too troublesome, so the solution I thought of is to either slap on laminate flooring or MDF which would then be painted.

The question is; does MDF hold up to being walked on over a longer period? If it would work, is 12mm enough or do I need to go for a thicker size?
 
It might possibly hold for a while if you round off edges properly and it's a staircase that you never ever step on with anything other than socks on your feet. And of course, paint according to the rules with sanding between coats, etc.

That said, I think you're trying to take a shortcut that will end up ugly and bad in the long run. What happens then when the MDF board is worn out and ugly? Will you glue on a new one again, or start sanding down 12-15mm through the MDF board to your old glue residues?

If the staircase is to be painted anyway, you don't need to get down to spotless wood. If there are big lumps, use the glue removal blade on a multi-machine (feiner) before planing sanding. Otherwise, use a sander with high removal. Good machines for this are available for rent at a low cost. Some have been successful with a rotating steel brush from Biltema on a regular drill as well...

Here's a thread that covers the subject well https://www.byggahus.se/forum/threads/ta-bort-lim-fran-traetrapp.64135/

The alternative is to pay around 20 popp for a staircase company to install new solid wood steps, like oak... =)

Good luck! =)
 
The answer I feared. Thanks for the post. The decision is made, tomorrow the sanding machines are coming out.
 
kulle
A paint remover works well for cleaning with
 
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Joak
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Also voting for paint remover. Rented a Metabo LF724S at Cramo for just over a hundred, it removed all the gunk and old varnish on the staircase (15 steps) in a couple of hours.
 
I used soapy water and a scrubbing brush
 
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