moisture can condense in walls and roofs and become trapped → mold, mildew, rot
- low R values → energy flow through wall → drying of wall
- solid lumber vs engineered lumber
pressure treating
animation
- decay, termites, marine borers, fire
- fungi feed on cellulose or lignin when > 20% MC
- termites feed on cellulose
- pressure treatment poisons fungi and termites
partial saturation
NSD Supplement applies to treated and untreated
incised and fire retardant lumber need reductions
