05 Excavate and Filling

 236 237 238 239 240 241 242 243 244  Item PC £ Labour hours Labour £ Plant £ Material £ Unit Total rate £ SITE CLEARANCE AND PREPARATION Site clearance Prices are applicable to excavation in firm soil Fell and removing trees girth 500–1500 mm – 18.50 251.59 14.92 – nr 266.51 girth 1500–3000 mm – 32.50 441.97 14.92 – nr 456.89 girth exceeding 3000 mm – 46.50 632.36 18.65 – nr 651.01 Removing tree stumps girth 500 mm–1.50 m – 2.00 27.20 21.87 – nr 49.07 girth 1.50–3.00 m – 3.00 40.80 31.25 – nr 72.05 girth exceeding 3.00 m – 6.00 81.60 43.83 – nr 125.43 Clearing site vegetation bushes, scrub, undergrowth, hedges and trees and tree stumps not exceeding 500 mm girth – 0.03 0.41 1.22 – m² 1.63 Lifting turf for preservation, by hand stacking – 0.32 4.35 – – m² 4.35 Topsoil for preservation; to spoil heap less than 50 m from excavations average depth 150 mm – 0.02 0.27 0.87 – m² 1.14 add or deduct for each 25 mm variation in average depth – 0.01 0.14 0.20 – m² 0.34 EXCAVATION Excavating by machine To reduce levels maximum depth not exceeding 0.25 m – 0.03 0.45 0.67 – m³ 1.12 maximum depth not exceeding 1.00 m – 0.03 0.45 0.67 – m³ 1.12 maximum depth not exceeding 2.00 m – 0.04 0.49 0.73 – m³ 1.22 maximum depth not exceeding 4.00 m – 0.04 0.55 0.80 – m³ 1.35 Basements and the like; commencing level exceeding 0.25 m below existing ground level maximum depth not exceeding 1.00 m – 0.06 0.81 1.22 – m³ 2.03 maximum depth not exceeding 2.00 m – 0.07 0.95 1.22 – m³ 2.17 maximum depth not exceeding 4.00 m – 0.08 1.09 1.50 – m³ 2.59 maximum depth not exceeding 6.00 m – 0.09 1.23 1.87 – m³ 3.10 maximum depth not exceeding 8.00 m – 0.12 1.63 2.16 – m³ 3.79 Pits maximum depth not exceeding 0.25 m – 0.31 4.21 4.41 – m³ 8.62 maximum depth not exceeding 1.00 m – 0.33 4.49 4.41 – m³ 8.90 maximum depth not exceeding 2.00 m – 0.39 5.30 4.97 – m³ 10.27 maximum depth not exceeding 4.00 m – 0.47 6.40 5.63 – m³ 12.03 maximum depth not exceeding 6.00 m – 0.49 6.66 5.91 – m³ 12.57 Extra over pit excavating for commencing level exceeding 0.25 m below existing ground level 1.00 m below – 0.03 0.41 0.66 – m³ 1.07 2.00 m below – 0.05 0.68 0.94 – m³ 1.62 3.00 m below – 0.06 0.81 1.22 – m³ 2.03 4.00 m below – 0.09 1.23 1.60 – m³ 2.83 EXCAVATION – cont Excavating by machine – cont Trenches; width not exceeding 0.30 m maximum depth not exceeding 0.25 m – 0.26 3.53 3.47 – m³ 7.00 maximum depth not exceeding 1.00 m – 0.28 3.81 3.47 – m³ 7.28 maximum depth not exceeding 2.00 m – 0.33 4.49 4.04 – m³ 8.53 maximum depth not exceeding 4.00 m – 0.40 5.44 4.97 – m³ 10.41 maximum depth not exceeding 6.00 m – 0.46 6.25 5.91 – m³ 12.16 Trenches; width exceeding 0.30 m maximum depth not exceeding 0.25 m – 0.23 3.13 3.10 – m³ 6.23 maximum depth not exceeding 1.00 m – 0.25 3.40 3.10 – m³ 6.50 maximum depth not exceeding 2.00 m – 0.30 4.08 3.75 – m³ 7.83 maximum depth not exceeding 4.00 m – 0.35 4.76 4.41 – m³ 9.17 maximum depth not exceeding 6.00 m – 0.43 5.85 5.63 – m³ 11.48 Extra over trench excavating for commencing level exceeding 0.25 m below existing ground level 1.00 m below – 0.03 0.41 0.66 – m³ 1.07 2.00 m below – 0.05 0.68 0.94 – m³ 1.62 3.00 m below – 0.06 0.81 1.22 – m³ 2.03 4.00 m below – 0.09 1.23 1.60 – m³ 2.83 For pile caps and ground beams between piles maximum depth not exceeding 0.25 m – 0.35 4.76 6.00 – m³ 10.76 maximum depth not exceeding 1.00 m – 0.39 5.30 5.91 – m³ 11.21 maximum depth not exceeding 2.00 m – 0.39 5.30 6.57 – m³ 11.87 To bench sloping ground to receive filling maximum depth not exceeding 0.25 m – 0.07 0.95 1.60 – m³ 2.55 maximum depth not exceeding 1.00 m – 0.09 1.23 1.60 – m³ 2.83 maximum depth not exceeding 2.00 m – 0.09 1.23 1.87 – m³ 3.10 Extra over any types of excavating irrespective of depth excavating below ground water level – 0.13 1.77 2.16 – m³ 3.93 next to existing services – 0.35 4.76 1.22 – m³ 5.98 around existing services crossing excavation – 0.60 8.16 3.47 – m³ 11.63 Extra over any types of excavating irrespective of depth for breaking out existing materials rock – 2.95 40.12 19.50 – m³ 59.62 concrete – 2.55 34.68 15.37 – m³ 50.05 reinforced concrete – 3.60 48.96 22.40 – m³ 71.36 brickwork, blockwork or stonework – 1.85 25.16 11.31 – m³ 36.47 Extra over any types of excavating irrespective of depth for breaking out existing hard pavings, 75 mm thick coated macadam or asphalt – 0.19 2.59 0.97 – m² 3.56 Extra over any types of excavating irrespective of depth for breaking out existing hard pavings, 150 mm thick concrete – 0.39 5.30 2.34 – m² 7.64 reinforced concrete – 0.58 7.89 3.18 – m² 11.07 coated macadam or asphalt and hardcore – 0.26 3.53 1.09 – m² 4.62 Working space allowance to excavations 600 mm wide reduce levels, basements and the like – 0.07 0.95 1.22 – m² 2.17 pits – 0.19 2.59 3.47 – m² 6.06 trenches – 0.18 2.45 3.10 – m² 5.55 pile caps and ground beams between piles – 0.20 2.72 3.47 – m² 6.19 Extra over excavating for working space for backfilling in with special materials hardcore – 0.13 1.77 1.53 20.00 m² 23.30 sand – 0.13 1.77 1.53 26.74 m² 30.04 40 mm–20 mm gravel – 0.13 1.77 1.53 37.30 m² 40.60 plain in situ ready mixed designated concrete C7.5–40 mm aggregate – 0.93 14.82 1.61 56.99 m² 73.42 Excavating by hand Topsoil for preservation average depth 150 mm – 0.23 3.13 – – m² 3.13 add or deduct for each 25 mm variation in average depth – 0.03 0.41 – – m² 0.41 To reduce levels maximum depth not exceeding 0.25 m – 1.44 19.58 – – m³ 19.58 maximum depth not exceeding 1.00 m – 1.63 22.17 – – m³ 22.17 maximum depth not exceeding 2.00 m – 1.80 24.48 – – m³ 24.48 maximum depth not exceeding 4.00 m – 1.99 27.06 – – m³ 27.06 Basements and the like; commencing level exceeding 0.25 m below existing ground level maximum depth not exceeding 1.00 m – 1.90 25.84 – – m³ 25.84 maximum depth not exceeding 2.00 m – 2.04 27.74 – – m³ 27.74 maximum depth not exceeding 4.00 m – 2.73 37.12 – – m³ 37.12 maximum depth not exceeding 6.00 m – 3.33 45.29 – – m³ 45.29 maximum depth not exceeding 8.00 m – 4.02 54.67 – – m³ 54.67 Pits maximum depth not exceeding 0.25 m – 2.13 28.96 – – m³ 28.96 maximum depth not exceeding 1.00 m – 2.75 37.40 – – m³ 37.40 maximum depth not exceeding 2.00 m – 3.30 44.88 – – m³ 44.88 maximum depth not exceeding 4.00 m – 4.18 56.85 – – m³ 56.85 maximum depth not exceeding 6.00 m – 5.17 70.31 – – m³ 70.31 Extra over pit excavating for commencing level exceeding 0.25 m below existing ground level 1.00 m below – 0.42 5.72 – – m³ 5.72 2.00 m below – 0.88 11.97 – – m³ 11.97 3.00 m below – 1.30 17.67 – – m³ 17.67 4.00 m below – 1.71 23.26 – – m³ 23.26 Trenches; width not exceeding 0.30 m maximum depth not exceeding 0.25 m – 1.85 25.16 – – m³ 25.16 maximum depth not exceeding 1.00 m – 2.76 37.53 – – m³ 37.53 Trenches; width exceeding 0.30 m maximum depth not exceeding 0.25 m – 1.80 24.48 – – m³ 24.48 maximum depth not exceeding 1.00 m – 2.46 33.45 – – m³ 33.45 maximum depth not exceeding 2.00 m – 2.88 39.16 – – m³ 39.16 maximum depth not exceeding 4.00 m – 3.66 49.77 – – m³ 49.77 maximum depth not exceeding 6.00 m – 4.68 63.64 – – m³ 63.64 EXCAVATION – cont Excavating by hand – cont Extra over trench excavating for commencing level exceeding 0.25 m below existing ground level 1.00 m below – 0.42 5.72 – – m³ 5.72 2.00 m below – 0.88 11.97 – – m³ 11.97 3.00 m below – 1.30 17.67 – – m³ 17.67 4.00 m below – 1.71 23.26 – – m³ 23.26 For pile caps and ground beams between piles maximum depth not exceeding 0.25 m – 2.78 37.80 – – m³ 37.80 maximum depth not exceeding 1.00 m – 2.96 40.25 – – m³ 40.25 maximum depth not exceeding 2.00 m – 3.52 47.86 – – m³ 47.86 To bench sloping ground to receive filling maximum depth not exceeding 0.25 m – 1.30 17.67 – – m³ 17.67 maximum depth not exceeding 1.00 m – 1.48 20.13 – – m³ 20.13 maximum depth not exceeding 2.00 m – 1.67 22.71 – – m³ 22.71 Extra over any types of excavating irrespective of depth excavating below ground water level – 0.32 4.35 – – m³ 4.35 next existing services – 0.93 12.65 – – m³ 12.65 around existing services crossing excavation – 1.85 25.16 – – m³ 25.16 Extra over any types of excavating irrespective of depth for breaking out existing materials rock – 4.63 62.96 17.52 – m³ 80.48 concrete – 4.16 56.57 14.60 – m³ 71.17 reinforced concrete – 5.55 75.48 20.45 – m³ 95.93 brickwork, blockwork or stonework – 2.78 37.80 8.76 – m³ 46.56 Extra over any types of excavating irrespective of depth for breaking out existing hard pavings, 60 mm thick precast concrete paving slabs – 0.28 3.81 – – m² 3.81 Extra over any types of excavating irrespective of depth for breaking out existing hard pavings, 75 mm thick coated macadam or asphalt – 0.37 5.04 1.17 – m² 6.21 Extra over any types of excavating irrespective of depth for breaking out existing hard pavings, 150 mm thick concrete – 0.65 8.84 2.05 – m² 10.89 reinforced concrete – 0.83 11.29 2.93 – m² 14.22 coated macadam or asphalt and hardcore – 0.46 6.25 1.46 – m² 7.71 Working space allowance to excavationsreduce levels, basements and the like – 2.13 28.96 1.80 – m² 30.76 pits – 2.22 30.19 1.80 – m² 31.99 trenches – 1.94 26.38 1.80 – m² 28.18 pile caps and ground beams between piles – 2.31 31.42 1.80 – m² 33.22 Extra over excavation for working space for backfilling with special materials hardcore – 0.74 10.06 1.80 21.42 m² 33.28 sand – 0.74 10.06 1.80 30.88 m² 42.74 40 mm–20 mm gravel – 0.74 10.06 1.80 37.30 m² 49.16 plain in situ concrete ready mixed designated concrete; C7.5–40 mm aggregate – 1.02 16.26 1.80 56.99 m² 75.05 SUPPORT TO EXCAVATIONS Earthwork support (average risk prices) Maximum depth not exceeding 1.00 m distance between opposing faces not exceeding 2.00 m – 0.10 1.29 – 0.30 m² 1.59 distance between opposing faces 2.00–4.00 m – 0.10 1.42 – 0.35 m² 1.77 distance between opposing faces exceeding 4.00 m – 0.11 1.56 – 0.44 m² 2.00 Maximum depth not exceeding 2.00 m distance between opposing faces not exceeding 2.00 m – 0.11 1.56 – 0.35 m² 1.91 distance between opposing faces 2.00–4.00 m – 0.12 1.68 – 0.44 m² 2.12 distance between opposing faces exceeding 4.00 m – 0.13 1.81 – 0.56 m² 2.37 Maximum depth not exceeding 4.00 m distance between opposing faces not exceeding 2.00 m – 0.15 2.07 – 0.44 m² 2.51 distance between opposing faces 2.00–4.00 m – 0.15 2.07 – 0.56 m² 2.63 distance between opposing faces exceeding 4.00 m – 0.17 2.33 – 0.70 m² 3.03 Maximum depth not exceeding 6.00 m distance between opposing faces not exceeding 2.00 m – 0.17 2.33 – 0.53 m² 2.86 distance between opposing faces 2.00–4.00 m – 0.18 2.45 – 0.70 m² 3.15 distance between opposing faces exceeding 4.00 m – 0.21 2.84 – 0.88 m² 3.72 Maximum depth not exceeding 8.00 m distance between opposing faces not exceeding 2.00 m – 0.22 2.97 – 0.70 m² 3.67 distance between opposing faces 2.00–4.00 m – 0.27 3.62 – 0.88 m² 4.50 distance between opposing faces exceeding 4.00 m – 0.31 4.26 – 1.05 m² 5.31 Earthwork support (open boarded) Maximum depth not exceeding 1.00 m distance between opposing faces not exceeding 2.00 m – 0.27 3.62 – 0.62 m² 4.24 distance between opposing faces 2.00–4.00 m – 0.29 4.01 – 0.70 m² 4.71 distance between opposing faces exceeding 4.00 m – 0.33 4.52 – 0.88 m² 5.40 Maximum depth not exceeding 2.00 m distance between opposing faces not exceeding 2.00 m – 0.33 4.52 – 0.70 m² 5.22 distance between opposing faces 2.00–4.00 m – 0.37 5.04 – 0.84 m² 5.88 distance between opposing faces exceeding 4.00 m – 0.42 5.69 – 1.05 m² 6.74 SUPPORT TO EXCAVATIONS – cont Earthwork support (open boarded) – cont Maximum depth not exceeding 4.00 m distance between opposing faces not exceeding 2.00 m – 0.42 5.69 – 0.79 m² 6.48 distance between opposing faces 2.00–4.00 m – 0.47 6.46 – 0.98 m² 7.44 distance between opposing faces exceeding 4.00 m – 0.53 7.23 – 1.23 m² 8.46 Maximum depth not exceeding 6.00 m distance between opposing faces not exceeding 2.00 m – 0.53 7.23 – 0.88 m² 8.11 distance between opposing faces 2.00–4.00 m – 0.58 7.88 – 1.10 m² 8.98 distance between opposing faces exceeding 4.00 m – 0.67 9.04 – 1.40 m² 10.44 Maximum depth not exceeding 8.00 m distance between opposing faces not exceeding 2.00 m – 0.70 9.56 – 1.14 m² 10.70 distance between opposing faces 2.00–4.00 m – 0.79 10.72 – 1.32 m² 12.04 distance between opposing faces exceeding 4.00 m – 0.92 12.54 – 1.75 m² 14.29 Earthwork support (closeboarded) Maximum depth not exceeding 1.00 m distance between opposing faces not exceeding 2.00 m – 0.70 9.56 – 1.23 m² 10.79 distance between opposing faces 2.00–4.00 m – 0.77 10.46 – 1.40 m² 11.86 distance between opposing faces exceeding 4.00 m – 0.85 11.63 – 1.75 m² 13.38 Maximum depth not exceeding 2.00 m distance between opposing faces not exceeding 2.00 m – 0.88 12.01 – 1.40 m² 13.41 distance between opposing faces 2.00–4.00 m – 0.97 13.17 – 1.68 m² 14.85 distance between opposing faces exceeding 4.00 m – 1.05 14.34 – 2.10 m² 16.44 Maximum depth not exceeding 4.00 m distance between opposing faces not exceeding 2.00 m – 1.10 14.99 – 1.58 m² 16.57 distance between opposing faces 2.00–4.00 m – 1.24 16.80 – 1.96 m² 18.76 distance between opposing faces exceeding 4.00 m – 1.36 18.48 – 2.45 m² 20.93 Maximum depth not exceeding 6.00 m distance between opposing faces not exceeding 2.00 m – 1.37 18.60 – 1.75 m² 20.35 distance between opposing faces 2.00–4.00 m – 1.49 20.28 – 2.20 m² 22.48 distance between opposing faces exceeding 4.00 m – 1.67 22.74 – 2.80 m² 25.54 Maximum depth not exceeding 8.00 m distance between opposing faces not exceeding 2.00 m – 1.67 22.74 – 2.28 m² 25.02 distance between opposing faces 2.00–4.00 m – 1.84 25.06 – 2.63 m² 27.69 distance between opposing faces exceeding 4.00 m – 2.11 28.69 – 3.15 m² 31.84 Extra over earthwork support for curved – 0.02 0.26 – 0.30 m² 0.56 below ground water level – 0.27 3.62 – 0.27 m² 3.89 unstable ground – 0.44 5.94 – 0.53 m² 6.47 next to roadways – 0.35 4.78 – 0.44 m² 5.22 left in – 0.57 7.76 – 12.26 m² 20.02 Earthwork support (average risk prices – inside existing buildings) Maximum depth not exceeding 1.00 m distance between opposing faces not exceeding 2.00 m – 0.18 2.45 – 0.44 m² 2.89 distance between opposing faces 2.00–4.00 m – 0.19 2.59 – 0.50 m² 3.09 distance between opposing faces exceeding 4.00 m – 0.22 2.99 – 0.62 m² 3.61 Maximum depth not exceeding 2.00 m distance between opposing faces not exceeding 2.00 m – 0.22 2.99 – 0.50 m² 3.49 distance between opposing faces 2.00–4.00 m – 0.24 3.27 – 0.67 m² 3.94 distance between opposing faces exceeding 4.00 m – 0.32 4.35 – 0.74 m² 5.09 Maximum depth not exceeding 4.00 m distance between opposing faces not exceeding 2.00 m – 0.28 3.81 – 0.67 m² 4.48 distance between opposing faces 2.00–4.00 m – 0.31 4.21 – 0.79 m² 5.00 distance between opposing faces exceeding 4.00 m – 0.34 4.62 – 0.93 m² 5.55 Maximum depth not exceeding 6.00 m distance between opposing faces not exceeding 2.00 m – 0.34 4.62 – 0.75 m² 5.37 distance between opposing faces 2.00–4.00 m – 0.38 5.17 – 0.93 m² 6.10 distance between opposing faces exceeding 4.00 m – 0.43 5.85 – 1.10 m² 6.95 DISPOSAL Disposal of excavated material off site Basic landfill tax rates (exclusive of site tipping charges) inactive waste – – – – 2.88 tonne 2.88 all other taxable wastes – – – – 91.62 tonne 91.62 DISPOSAL – cont Disposal of excavated material off site – cont Excavated material deposited off site inactive waste off site; to tip not exceeding 13 km (using lorries); including Landfill Tax – 0.12 1.57 16.43 12.92 m³ 30.92 active non-hazardous waste off site; to tip not exceeding 13 km (using lorries); including Landfill Tax – 0.06 1.01 14.29 216.41 m³ 231.71 Retain excavated material on site Excavated material deposited on site using dumpers to transport material on site; spreading; average 25 m distance – 0.20 2.72 0.46 – m³ 3.18 on site; depositing in spoil heaps; average 50 m distance – – – 1.13 – m³ 1.13 on site; spreading; average 50 m distance – 0.20 2.72 0.87 – m³ 3.59 on site; depositing in spoil heaps; average 100 m distance – – – 2.00 – m³ 2.00 on site; spreading; average 100 m distance – 0.20 2.72 1.34 – m³ 4.06 on site; depositing in spoil heaps; average 200 m distance – – – 2.53 – m³ 2.53 on site; spreading; average 200 m distance – 0.20 2.72 1.80 – m³ 4.52 FILLING OBTAINED FROM EXCAVATED MATERIAL Filling to make up levels By machine average thickness over 50 mm not exceeding 500 mm – 0.22 2.94 2.15 – m³ 5.09 average thickness exceeding 500 mm – 0.18 2.45 1.56 – m³ 4.01 By hand average thickness over 50 mm not exceeding 500 mm – 1.25 17.00 4.23 – m³ 21.23 average thickness exceeding 500 mm – 1.02 13.87 3.44 – m³ 17.31 Surface treatments Surface packing to filling To vertical or battered faces – 0.17 2.31 0.18 – m² 2.49 Compacting bottoms of excavations – 0.04 0.55 0.04 – m² 0.59 Trimming sloping surfaces; by hand – 0.17 2.31 – – m² 2.31 IMPORTED FILLING Basic material prices delivered to site Supply only in full loads DOT type 1 – – – – 19.06 tonne 19.06 DOT type 2 – – – – 19.06 tonne 19.06 10 mm single size aggregate – – – – 21.73 tonne 21.73 20 mm single size aggregate – – – – 21.73 tonne 21.73 20 mm all in aggregate – – – – 24.82 tonne 24.82 40 mm all in aggregate – – – – 24.82 tonne 24.82 40 mm scalpings – – – – 21.73 tonne 21.73 hardcore – – – – 17.72 tonne 17.72 soft/building sand – – – – 22.61 tonne 22.61 recycled type 1 – – – – 20.19 tonne 20.19 E-blend (50% type 1 and 50% recycled type 1) – – – – 16.48 tonne 16.48 Filling to make up levels; by machine Average thickness over 50 mm not exceeding 500 mm obtained off site; imported topsoil 18.00 0.22 2.94 1.80 18.54 m³ 23.28 obtained off site; hardcore 35.50 0.25 3.43 2.07 36.56 m³ 42.06 obtained off site; granular fill type one 43.75 0.25 3.43 3.61 45.06 m³ 52.10 obtained off site; granular fill type two 43.75 0.25 3.43 3.61 45.06 m³ 52.10 obtained off site; sand 51.91 0.25 3.43 3.61 53.47 m³ 60.51 Average thickness over 500 mm obtained off site; imported topsoil 18.00 0.18 2.45 2.02 18.54 m³ 23.01 obtained off site; hardcore 35.13 0.22 2.94 0.40 36.18 m³ 39.52 obtained off site; granular fill type one 43.75 0.22 2.94 2.82 45.06 m³ 50.82 obtained off site; granular fill type two 43.75 0.22 2.94 2.82 45.06 m³ 50.82 obtained off site; sand 51.91 0.22 2.94 2.82 53.47 m³ 59.23 Filling to make up levels; by hand Average thickness over 50 mm not exceeding 500 mm obtained off site; imported topsoil 18.00 1.25 17.00 4.22 18.54 m³ 39.76 obtained off site; hardcore 35.50 1.39 18.90 4.70 36.56 m³ 60.16 obtained off site; granular fill type one 43.75 1.54 20.94 5.19 45.06 m³ 71.19 obtained off site; granular fill type two 43.75 1.54 20.94 5.19 45.06 m³ 71.19 obtained off site; sand 51.91 1.54 20.94 5.19 53.47 m³ 79.60 Average thickness over 500 mm obtained off site; imported topsoil 18.00 1.02 13.87 3.44 18.54 m³ 35.85 obtained off site; hardcore 35.50 1.34 18.22 4.53 36.56 m³ 59.31 obtained off site; granular fill type one 43.75 1.43 19.45 4.85 45.06 m³ 69.36 obtained off site; granular fill type two 43.75 1.43 19.45 4.85 45.06 m³ 69.36 obtained off site; sand 51.91 1.43 19.45 4.85 53.47 m³ 77.77 Surface treatments Surface packing to filling To vertical or battered faces – 0.17 2.31 0.18 – m² 2.49 IMPORTED FILLING – cont Surface treatments – cont Compacting bottoms of excavations – 0.04 0.55 0.04 – m² 0.59 filling; blinding with sand 50 mm thick – 0.04 0.55 0.04 2.17 m² 2.76 Trimming sloping surfaces; by hand – 0.17 2.31 – – m² 2.31 sloping surfaces; in rock – 0.93 12.55 4.08 – m² 16.63 GEOTEXTILE FABRIC Erosion mats Filter membrane; one layer; laid on earth to receive granular material; over 500 mm wide Terram 500 filter membrane or other equal; one layer; laid on earth. NB mainly agricultural/ landscape use 0.23 0.04 0.55 – 0.25 m² 0.80 Terram 700 filter membrane or other equal and approved; one layer; laid on earth 0.43 0.04 0.55 – 0.47 m² 1.02 Terram 1000; filter membrane or other equal and approved; one layer; laid on earth 0.35 0.04 0.55 – 0.39 m² 0.94 Terram 2000; filter membrane or other equal and approved; one layer; laid on earth 0.93 0.04 0.55 – 1.10 m² 1.65 Terram High Visibility; orange top surface to warn of potential hazardous material underneath 0.55 0.04 0.55 – 0.66 m² 1.21 MEMBRANES Sheeting to prevent moisture loss/gas barrier Building paper; lapped joints subsoil grade 410; horizontal on foundations – 0.02 0.32 – 0.84 m² 1.16 standard grade 420; horizontal on slabs – 0.04 0.64 – 1.25 m² 1.89 Polythene sheeting; lapped joints; horizontal on slabs 250 microns; 0.25 mm thick – 0.04 0.64 – 0.75 m² 1.39 Visqueen sheeting or other equal and approved; lapped joints; horizontal on slabs 250 microns; 0.25 mm thick – 0.04 0.64 – 0.63 m² 1.27 300 microns; 0.30 mm thick – 0.05 0.79 – 0.46 m² 1.25 gas-resistant damp-proof membrane taped joints – 0.05 0.79 – 5.69 m² 6.48 sealing at perimeter of slab – 0.10 1.60 – 1.48 m 3.08 sealing around penetrations; drain pipes etc. – 1.00 15.94 – 4.45 nr 20.39