Reply by Scott Bryan

Bungy, it would help to insulate the floor but it really depends on where you are located as to whether it will be cost effective or not. For instance here in Kentucky I can keep my shop comfortable with a 1500W space heater during winter and do not noticeably feel chilled by my uninsulated concrete floor. The normal ambient temperature is generally above 20 degrees Fahrenheit during the winter and I have about 350 sq feet to heat.

But adding a wood floor over the concrete would make it easier to work on.

-- Challenges are what make life interesting; overcoming them is what makes life meaningful- Joshua Marine