Air Infiltration ~ heating costs will increase if cold air is allowed to
penetrate peripheral gaps and breaks in the continuity of
construction. Furthermore, heat energy will escape through
structural breaks and the following are prime situations for
treatment:-
Loft hatch
Services penetrating the structure
Opening components in windows, doors and rooflights
Gaps between dry lining and masonry walls
Note: See page 365 for threshold detail.
Thermal Insulation---Draught Proofing