Are you a subscriber but don’t have an online account?

Register for full online access.

 
 
 
 

Other stories by Moira Harding

  • Beating the Big Chill

    Productivity drops when it’s cold, and some materials, like caulks, glues, concrete, and plaster, just won’t perform well. We compare features on several types of portable heaters and give tips on how to match the heater to the job.