Bear in mind that these comments are based on a working workshop floor under heavy use. Chips coming off my lathe are very hot and there are large amounts of them.
I started off with conveyor belting scrounged from a local quarry, used but because it's used it has a saucer shape to it and in one run it's not bad but putting two together means the edges often lift causing trip hazards. I just had single runs. Wears well, nothing sticks to it very hard but very heavy if you want to lift to clean.
At one point I tried the foam mats, they lasted a day. Chips just burn their way thru them or part way and leve sharp edges exposed.
Then went onto the rolls of rubber matting 3mm thick, this comes in either checker plate pattern or buttons. I chose buttons as I thought it would be easier to sweep. When new it was fine and very pleased with it but over a three year period it gradually swelled and bubbled up then started to split and it was a serious trip hazard.
Having said that this is 3 years in a very busy full time shop which would equate to 10 years ? in a home shop.
I was ready to replace it with the same or 5mm if I could find it when I discovered the horse mats made from rubber crumb. Bought one to try in front of the lathe which is the worst wear area in the shop. Came off Ebay and in my case 10' x 4'
Been down a year now and wearing well. Last week was a very busy week, flat out with breakdowns all week and not much time to clear up so today attacked the floor.
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This was it earlier today and I have raked all the birds nests up and this has been trodded in for just over a week.
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Part way thru the clean with a stiff nylon bristled brush and it cleaning up well. A lot of these chips are bright blue but being a crumb finish they don't leave marks. These are about 10mm thick but can be easily handled and when the workshop gets extended later this year I propose to floor the whole shop in these mats.