• Build or retrofit an energy-efficient log home.corner of log cabin image by jimcox40 from Fotolia.com
  
  Log homes have a high thermal mass, which means they are slow to change temperature. Their R-value (their ability to restrict heat flow), however, is only 1.25 per inch, while even the most basic insulation has an R-value of at least double that number. The roof and the space between the logs present the greatest problems for heating efficiency; these are the most neglected areas regarding insulation and the areas demanding immediate attention when post- and pre-construction insulation is your focus.
  
  

Chinking

• Chinking refers to the process of filling in the space between the logs with some form of additional insulation to stop drafts and heat loss. If the log house has not yet been built, make sure your builder lays strips of insulation between each log. If you are retrofitting a log home with insulation, choose a flexible chinking that will expand and contract with seasonal temperature fluctuations. Check with the manufacturer of the logs for a recommendation for a sealant or coating. The wrong sealant leads to peeling and ugly surfaces that cost a lot of money to fix.
  
  

Insulate the Inside

• Increase insulation along the logs as well as between them. To do this, it is necessary to build a wall inside the log wall with a vapor barrier on the "room" side to prevent moisture from penetrating the logs. This is a job for a professional.
  
  

Insulate Heating Ducts

• Heating ducts are located in uninsulated areas of the house, and the heat that passes through them is wasted on uninhabited space. Harry Yost of Mother Earth News recommends installing vinyl or foil-backed fiberglass duct insulation to all heating system ducts. First, seal all air leaks with silicone caulk, then cover all supply ducts with insulation and secure it with clinch-type staples or duct tape. If the insulation is sealed with duct tape, make sure it completely encircles the insulation and overlaps. Don't insulate return ducts.
  
  

Add Caulk to Windows

• Caulk will seal the gaps between walls and windows, keeping cold air out and warm air in. Harry Yost advises against sealing the weep holes at the bottom of storm windows, because these release moisture and prevent moisture buildup.