RayV wrote:

It could be worse, you could rent the machine to pull up the carpet
(never heard of that machine) and find that your concrete floor is not

The machine is basically a winch mounted on a small platform with a base
of angled spikes. The base gives it a good hold on the carpet in one end
of the room and the winch line attaches with a clamp to the carpet at
the other end (you pull up a foot or so). It just pulls the carpet back
with more force than a human can come up with.

Pete C.