Lifetime costs: masonry walls | Features

The cost benefits of improved wall insulation
House type	Pre-1 April 2002 values		Post-1 April 2002 values
	U-value of wall (W/m²K)	Annual energy cost (£)	U-value of wall (W/m²K)	Annual energy cost (£)	Annual saving (£)
End-of -terrace house	0.45	424	0.28	411	13
Mid-terrace house	0.45	420	0.28	412	8
First-floor flat	0.45	334	0.28	322	12
Table notes The cost values in the table are indicative and will vary with individual circumstances. Factors that will influence the results include: Size and location of the building Efficiency of the heating system and fuel costs Occupancy patterns, particularly control of ventilation and time spent in the building Market prices for the materials and labour for insulation work.