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1. Choose a portable space heater (or two) that's properly sized for the garage's square footage.

2. Insulate the walls with fiberglass batt and paneling.

3. Insulate the garage door.

Best Garage Door Insulation Kit

4. Seal gaps and drafts.

5. Install a radiant floor heating system.

6. Run a portable propane heater.

7. Warm up with a wood-burning stove.

8. Concentrate heat with a kerosene space heater.

9. Radiate heat.

10. Extend your mini-split system setup into the garage.

11. Reduce thermal transfer with a floor covering.

Most garages aren’t designed to stay warm inside when outdoor temperatures are frigid. Garages usually lack insulation, and their concrete floors remain chilly all year around.…