Notes:
 - Cavity barriers prevent fire spread. 
 The principal locations are between
 elements and compartments of
 construction (see B. Regs. A.D. B3).
 
 - Thermal bridging through solid 
 framing may be reduced by using rigid
 EPS insulation and lighter `I' section
 members of plywood or oriented
 strand board (OSB).
 
Timber Frame Construction
