How to heat your workshop
When you work with glue-in making woodwork joints-you need a warm atmosphere in order that the glue won't get chilled. If it does, then it will not produce a good joint because wood as well as glue won't adhere properly if cold. They must be warm.
Of course, the man or woman in the workshop must also be warm, as cold fingers won't be very happy in trying to work.
If your shop, therefore, is not located where the house heating system reaches it,, install a portable gas or electric or oil heater. Stand it on a sheet of metal, so it will not cause fire to the wood floor.
Make a wire screen or "cage" around the heater, to be sure that neither you nor the material on which you work is exposed to the direct flame or wires of heat.