Tape

These things usually are stored rolled up, and they curl when new because of that.

Usually they’ll lay flat in their own inside of a week. I have seen people hasten that with a heatgun or small portable room heater- just enough to warm it a bit.

I’ve also seen people melt them trying that.

I have to move it to mop so fastening it the floor is out.

Hopefully it doesn’t understand this yet.

It’s just a stupid piece of carpet after all.

You show it some big & nasty looking screws and say: either you stay down NOW or I will have to fix you, and this is going to HURT!

.carpet{ border-radius:20% 20% 0 0; }

Shock treatment. Barely heat it, not so it’s hot to the touch, but warm and pliable. Then flatten the fuck out of it with something cold. I have aluminum plates for this but you could use some steel that fits in the freezer, or steel with a bag of ice on it. The idea is that we get it pliable, put it how we want it, and then cool it off rapidly to make it stay like that.

Alternate: tell the boss to get a decent walk off mat

Roll it in reverse all night if you can

Reverse bending has worked for me.

Or find some reason to put an indoor plant, large ornament or small bookcase on it.

Use carpet tape (double-sided tape that’s meant for sticking rugs to the floor) to fasten stiff squares of material to the undersides of the corners. The stiff material will keep it from curling, but it won’t be stuck down to the floor so you can still move it.

Maybe try a heat gun before applying the weight?

I’ve seen people use low profile corner weights on those before. They’re little triangular weights that slip over the corners. May not be legal in some areas due to being a tripping hazard.

You can’t attach it to the floor, but can you use some good double-sided tape or super glue to attach some steel weights to the underside of the corners?

Any home improvement store should have some flat bar. 1/8" or about 3mm should be flat enough to avoid a tripping hazard, but check local regs for commercial properties.

Lay it out flat in the sun or use an adhesive.

This looks like an office building? You could turn the corners into “meeting areas” where business men and women meet for brainstorming or team building exercises. If this is your private home you could have your children stand there when they have done something naughty.

Could you carpet tape it or Velcro it down?

Could you fold the sides a bit under the carpet over night? Kind of like straightening rolled up paper.