Energy Efficiency

  • The exception to IRC Section R602.3.2 allows for the use of a single top plate in a wood stud wall if the design meets specific requirements.
  • By cutting the volume of lumber in the top plate in half, a single top plate allows more space for insulation and can reduce thermal bridging through the lumber, which increases the thermal efficiency of the wall system.
  • When trusses are centered over the studs with a tolerance of not more than 1", the stud spacing can be increased to 24" o.c., which removes more lumber, improves energy efficiency and still provides a continuous load path.
  • To determine if the use of a single top plate is beneficial, a number of factors must be weighed. 

Beyond super-sized energy efficiency, there are many other benefits to net-zero homes.