homebuilding.co.uk 195THe esTiMaTedCOsTs
THeTRadesinvOlvedinTHissTaGe
1
The main trade is obviously that of
the roof tiler/slater, but several of the
other trades have to fit in around them
and assist in the process. Most tilers mix
up and lay their own mortar to the ridges
andpointupbetweenthe undercloak
andtheundersideofthetiles or slates at
ay leave it to the
bricklayersorgeneralbuilder.2
Bricklayersmayalsoneed to be on
hand to bed any undercloak to the
verges and to point up any flashings that
are let into the chimney.3
A plumber may be necessary to
construct and/or fix flashings to
chimneys that protrude through or
into the roof planes and to set the skirts
around the vent and flue pipes that
protrude through it.4
Sometimes the underfelt and battening
can be carried out by carpenters or
any other competent tradesperson but it
is usual for the tilers/slaters to gauge and
fix their own battening.5
General labour will be needed to get
the slates/tiles up onto and loaded out
on the roof.Theestimateforthematerialsandplantfortheroofcoveringworks:
Breathablemembrane £269.32
Batteningandnails £165.32
Vergeundercloakandeavessupport £116.22
Slates/tiles £1,605.60
Ridgetilesanddryridgesystem £268.74
Leadwork £173.75
Wasteto skips £173.60
TOTAL £2,772.55Theestimate/budgetforlabourcostsattributedtothistask:
TOTALLABOURCOST £3,034.36TOTALLABOURANDMATERIALCOST: £5,806.91
l The plans just noted that the roof was to be slated and it had been
assumed on our estimation that we would want to go for the cheapest
alternative. So the estimators based their estimate on the use of large flat
concrete interlocking tiles.
l General plant, such as digger and mixers, was provided by the builder
within the contract. Specialist plant was hired in at appropriate times
during the build.
l The labour estimate assumed that the work was to be carried out by a
single trade and that, any ancillary work by other trades would be included
within their overall prices for their parts of the project.