ABSTRACT

WATERPROOFING AND DRAINAGE

OPTIONS – cont

Inverted waterproofing systems; to roof

surfaces to receive Green Roof systems

Monolithic hot melt rubberized bitumen;

applied in two 3mm layers incorporating a

polyester reinforcing sheet with 4mm thick

protection sheet and chemically impregnated

root barrier; fully bonded; applied to plywood

or suitably prepared wood float finish and

primed concrete deck or screeds

10mm thick – – – – – m2 35.62 Roofmate; extruded polystyrene insulation;

optional system; thickness to suit required U

value; calculated at design stage; indicative

thicknesses; laid to Hydrotech 6125

0.25 U value; average requirement 120mm – – – – – m2 24.69

Q35 LANDSCAPE MAINTENANCE

LONG-TERM MAINTENANCE

Preamble: Long-term landscape

maintenance

Maintenance on long-term contracts differs in

cost from that of maintenance as part of a

landscape contract. In this section the contract

period is generally 3-5 years. Staff are generally allocated to a single project only and

therefore productivity is higher whilst overhead

costs are lower. Labour costs in this section

are lower than the costs used in other parts of

the book. Machinery is assumed to be leased

over a five year period and written off over the

same period. The costs of maintenance and

consumables for the various machinery types

have been included in the information that

follows. Finance costs for the machinery have

not been allowed for.