The table below shows the "U" values for a variety of constructional materials in common domestic use.

Construction	"U" Value
280mm cavity wall	1.5
280mm foam-filled cavity wall	0.57
230mm solid brick	2.1
Inner partition walls	2.04
Ceiling in House (Ground Floor)	1.59
Ceiling in house (First Floor)	.45
Ceiling in bungalow	.45
Windows, wood	4.3
Windows, metal	5.6
Floors (varying according to size of room and number of outside walls.)
Wood floor	0.8 - 1.3 (Suspended wood floor with 25mm fibreglass.)
Solid floor on earth	0.5 - 1.0 (Insulation between boards & joists.)
Air Changes: Halls approx 2 per hour. All other rooms 1.5 per hour except bedrooms which are typically 1 per hour.