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I've done a lot of floor sanding recently and found narrow spaces really annoying to work in with a proper floor sander, and edging sanders hard not to fuck up with, especially when you're tired.
A belt and random orbit might be less frustrating. I think your space looks small for a floor sander but quite big for hand tools - it's probably going to be a bit annoying either way.
If you're trying to even out the floor you will still need to work up through the grits to get a good finish (@benonfloors on Instagram/How to Sand a Floor on YouTube suggests never going more than double the previous grit, e.g. 40-60-100-120 should be alright). Amazon have some big boxes of 10 discs each from 40 to 180 grit.
Floor sanding questions.
So I’ve laid the reclaimed beech. There’s a few spots where the boards have a lip of about 1mm. I’d planned on just doing it with a belt sander and an orbital. A bit of time on google has me doubting this. The floor is in a hallway and a toilet, so it’s a lot of narrow space, and it’s only about 10 sq m.
The thing that has me a bit confused is that a lot of advice online is for sanding existing floors - which includes sanding off the lacquer or varnish. Because I don’t have that to deal with, will a belt and orbital sander be sufficient, or should I hire a proper floor sander and edging sander? Energy for the job is running low, keen to not fuck up the finishing.