Instead of heating an entire building — or setting up a temporary enclosure — to protect a cold-weather concrete pour, put the heat just where it’s needed, with a Multi-Duty heating blanket. These blankets are powered by 120V electricity and have a water-resistant outer shell, says the maker. They can also be used to thaw frozen ground and prevent paints and coatings from freezing. Standard sizes run from 2 by 2 feet to 11 by 23 feet; prices range from $300 to $2,500. Custom sizes are available too. Powerblanket, 877/398-7407, powerblanket.com.