Page 72 - SMM2 eBOOK

SECTION L

ROOFING

Generally

L.1 Classification of work

Work shall be classified according to the kind of material and each classification with its
associated labours shall be given under an appropriate heading. Asphalt roofing shail be given
in accordance with Section K and patent glazing in accordance with Section T.

L2 Measurement

1. Slate or tile roofing, corrugated or troughed roofing and roof decking shall be measured as
carried out. Bitumen - felt roofing shall be measured the area in contact with the base.
Sheet metal roofing, flashings and gutters shall be measured as the area of finished
surface subject to the allowance in clause L.38. No deduction shall be made for voids not
exceeding 0.50m .

2. Work to dormers and the like shall be so described.

3. Work to curved, conical and spherical roofs shall each be so described stating the radius
or diameter at base. Work to elliptical roofs and other roofs curved to more than one
radius shall be so described stating the radii.

Slate or tile roofing

L.3 Generally

1. Particulars of the following shall be given:

a. Kind and quality of slates and tiles (examples of kind of slates or tiles include
asbestos cement, natural slate, stone, clayware, concrete and shingles).
b. Size of slates or tiles.
c. Minimum extent of side and end laps.
d. Method of fixing and the number and kind of fixings per slate or tile.
e. Size and type of laths or battens.

L.4 Roof coverings

Roof coverings shall be given in square metres stating the pitch or pitches grouped together.
Verticai coverings shall be given separately.

L.5 Labours on roof coverings

l. The following shall be deemed to be included with roof coverings:

a. Square cutting, raking cutting and curved cutting.
b. Holes for pipes, standards and the like.
c. One and half width slates or tiles wherever they occur.

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