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.