This will be according to your shed plans.
Insulating the floor of a shed.
Warm air rises and so naturally the walls and the roof are the first areas to consider.
If you are installing insulation on a pre built shed you cannot simply drill a hole in the floor and pump it full of spray foam.
Is an effective but more expensive solution for floor insulation in your shed.
One of the drawbacks for spray foam is that you need backing for it to adhere to the surface.
I recommend foam boards as they can be cut to fit between the floor joists easily.
Insulating the walls would be simple because they were exposed to the inside and insulation batting could easily be squished between the studs.
8 how to insulate a shed floor.
Insulating a shed floor is not one of the first things that comes to mind when insulating a small building.
Access to the underside of the floor though affects the options available for insulating it.
There is a nice video below detailing how to do this easily.
I have a friend who lifted his unfinished shed to permit the floor to be insulated then lowered it back down.
Insulating the shed floor will help create a thermal barrier between the inside and outside air spaces.
However having a layer of insulation beneath the floor boards will contribute towards keeping the contents of the shed toasty.