<P> Thermal bridges can also be created by uncoordinated construction, for example by closing off parts of external walls before they are fully insulated . The existence of inaccessible voids within the wall cavity which are devoid of insulation can be a source of thermal bridging . </P> <P> Some forms of insulation transfer heat more readily when wet, and can therefore also form a thermal bridge in this state . </P> <P> The heat conduction can be minimized by any of the following: reducing the cross sectional area of the bridges, increasing the bridge length, or decreasing the number of thermal bridges . </P> <P> One method of reducing thermal bridge effects is the installation of an insulation board (e.g. foam board EPS XPS, wood fibre board, etc .) over the exterior outside wall . Another method is using insulated lumber framing for a thermal break inside the wall . </P>

Where does the greatest heat loss occur in a structure