- Insulation must be in
contact with an air barrier.
- A-9.25.2.3.3) For Thermal
Insulation to be effective, it must not be short-circuited by
convective airflow through or around the material.
NOTE: Air spaces around insulation leads to convective
airflow which greatly reduces the effectiveness of the
insulation.
- Thermal insulation must
therefore be installed in full and continuous contact with the air
barrier or another continuous component with low air
permeance.
9.25.2.3.3) Except where the insulation provides the principle
resistance to air leakage, thermal insulation shall be installed so
that at least one face is in full and continuous contact with an
element of low air permeance.