ABSTRACT
Glass blocks (100mm thick) 150 ✕ 150 98 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..200 ✕ 200 83
ROOFING † Slates † see page 518 Thatching (300mm thick) 40„00 Tiles † plain clay 63„50 .. † plain concrete 93„00
.. single lap, concrete 49„00 Tile battens (50 ✕ 25) and felt underlay 7„70 Bituminous felt underlay 1„00 Bituminous felt, sanded topcoat 2„70 3 layers bituminous felt 4„80 HD/PE breather membrane underlay 0„20
SHEETMATERIALS †
Aluminium (0„9mm) 2„50 Copper (0„9mm) 4„88 Cork board (standard) per 25mm thickness 4„33 .. .. .. .. .. .. .. .. (compressed) .. .. .. .. .. .. .. .. 9„65 Hardboard (3„2mm) 3„40 Glass (3mm) 7„30 Lead (1„25mm) 14„17
.. .. (3mm) 34„02 Particle board/chipboard (12mm) 9„26 .. .... .... .. .. .. .. .. .. .. .. .. .. .. .. (22mm) 16„82 Planking, softwoodstrip flooring (ex25mm) 11„20
.. .. .. .. .. .. .. .. .. .. hardwood .. .. .. .. .. .. .. .. .. 16„10 Plasterboard (9„5mm) 8„30 .. .. .. .. .. .. .. (12„5mm) 11„00 .. .. .. .. .. .. .. (19mm) 17„00 Plywood per 25mm 15„00
PVC floor tiling (2„5mm) 3„90 Strawboard (25mm) 9„80
Densities:
Material Approx. density (kg/m3)
Cement 1440
Concrete (aerated) 640
.. .. .. .. .. .. (broken brick) 2000
.. .. .. .. .. .. (natural aggregates) 2300
.. .. .. .. .. .. (no-fines) 1760
.. .. .. .. .. .. (reinforced) 2400
Metals: Aluminium 2710
Brass 8500 Copper 8930 Lead 11325 Steel 7860 Tin 7300 Zinc 7140
Timber (softwood/pine) 480 (average) .. .. .. (hardwood, e.g. maple, teak, oak) 720 .. .. ..
