I insulated mine in similar materials i.e. gun grade foam in the ribs, kingspan and sheeps wool and it works in both hot and cold weather. In Spain at the moment and it gets cold at night but can be warm during the day.
You may find that it will be easier to use carpet tiles as they are easier to change at a later date and you can fit them around the furniture as one of the last jobs.
Mike
You may find that it will be easier to use carpet tiles as they are easier to change at a later date and you can fit them around the furniture as one of the last jobs.
Mike