The document outlines the materials and measurements for the roof and roof structure of Block C (Office). It specifies timber plates, roof members, ceiling joists, rafters, ridges and struts made of Grade B sawn pressure timber between 100mm-125mm wide. The roof covering will be 420mm x 330mm cement interlocking tiles at a 30 degree pitch, with ridge tiles added. A double sided aluminium foil insulation paper will be laid over straining wires at the joists. 150mm x 25mm wide wrot pressure treated Grade B timber fascia boards will be fixed to the structure and painted.

1. BILL NO. 5
BLOCK C (OFFICE)
ROOF AND ROOF STRUCTURE
Timber Roof Structure
Wall Plate
A 100mm x 50mm sawn pressure timber m 15
Grade B timber plates
Timber Roof members
125mm x 50mm sawn pressure timber
Grade B pitched roof members:-
B Ceiling Joists m 138
C Rafters m 175
D Ridges m 8
E Struts m 227
Roof Covering
Monier or other approved equivalent brand
420mm x 330mm cement interlocking
tiles to 75mm head lap laid at 30°
pitched, each tile nailed every alternate
course on 50 X25 mm sawn pressure
treated Grade B timber battens:-
F To roof covering m2 101
Extra Over cement interlocking tiles
for 450mm width ridge tiles beded and
painted and pointed in cement and
sand (1:3) mortar.
G To ridges m 8
H A layer of double sides aluminium
foil insulation paper laid on straining
wires & lapped 150mm at joists. m2 101
Fascia Boards
J 150mm x 25mm wide wrot pressure
treated Grade B timber fascia board
fixed to timber structure. m 16
Painting for fascia boards
Knotting, stopping and apply one coat of Jotun
Gardex primer, one Jotun Gardex undercoat
and two finishing coats of Jotun Gardex or other
approved equivalent gloss paint
K to fascia boards, over 300mm girth m2 5
- CARRIED TO SUMMARY -
TOTAL ELEMENT NO. 4 - ROOF AND ROOF STRUCTURE
G/B5/4/1