Page 37 - Architects Design and Installation Manual

Quick Facts Page | 37

● Cheaper than concrete blocks Cost Comparison
● Save on spoil and foundations SureCav25 v Concrete Blocks
● Quicker construction saves money

Costs and savings comparison table
Costs and savings are those incurred using 100mm, 7N dense concrete backing blocks, which
are not required when SureCav25 or SureCav50 is used.
The Costs are based on a 200 square metre wall dwelling which is the estimated square
meterage of a four bedroom house.

The cost of SureCav for this area is priced at £19.20 m2 is (plus installation by purchaser at
£3.00 m2) giving a total of £4,440.00
(By applying the SureCav reduced rate for 200+ square metres)
Description Rate Per Cost
Material Cost
Concrete Block 8.18 psm* 1636
DPC Linear Metres 1.5 plm* 60
Mortar 3 psm* 600
Spoil Excavation and Haulage 30 cm* 120
Additional Concrete in Foundations 100 cm* 400
Lintels over doors and windows in backing block skin At least 600
along with additional wall ties
Labour Cost
Bricklayers and Labourer (estimated) 15 psm* 3000
Additional Costs
2 weeks extra financing on contract Estimated 350
2 weeks additional scaffold hire 100 pw* 200
Total Estimated Cost of Using Concrete Backing Blocks 6996
Comparison Results of SureCav v 100mm Concrete Blocks (per square metre)
Estimated Cost of Using Concrete Backing Blocks 34.83
SureCav @ £19.20 per square metre plus estimated purchaser's 22.2
installation costs of £3.00 m2)
Estimated saving by using SureCav (per sq.m) £ 12.63

By choosing SureCav25 or SureCav50 you could be saving the difference of £12.63 per square
meter which, for 200m2 would be £2,526.00. Also, don’t forget that the time saved using
SureCav results in a faster build, estimated to be 10 working days on an average four bedroom
house.

*psm - per square metre *plm - per linear metre *pw - per week
*cm - per cubic metre - 100mm x 40m i.e. 4 cubic metre