By continuing to use the site you agree to our Privacy & Cookies policy

Costs: Insulation

Get all warm and cosy with your estimating! Here, Neil Barnett, resource cost services manager of BCIS, the Building Cost Information Service of the RICS, provides the latest sample cost breakdowns for various types of heat and sound insulation products

These guides reflect the prices a developer might expect to pay on a medium-sized residential project for products in the low to upper-middle specification range. Prices do not include for the contractor’s preliminaries, overhead or profit margin. The base date is January 2013 and prices are based on the BCIS Online Estimating Data.

Thermal insulation to basement

80mm thick expanded polystyrene and geotextile grooved boarding for external use on basement walls as insulation and protection to the damp proof membrane 19 - 21 (£/m2)

Thermal insulation to floors

50mm thick PIR rigid insulating board under floor bearing concrete beds or screeds, standard duty 10 - 12 (£/m2)

50mm thick PIR rigid insulating board under floor bearing concrete beds or screeds, medium duty 11 - 13 (£/m2)

50mm thick PIR rigid insulating board under floor bearing concrete beds or screeds, heavy duty 13 - 15 (£/m2)

Thermal insulation to walls

50mm PIR rigid cavity wall batts/ slabs, built in as the work proceeds 11 - 13 (£/m2)

75mm ditto 15 - 17 (£/m2)

50mm fibre glass cavity wall batts/ slabs, built in as the work proceeds 6 - 7 (£/m2)

50mm expanded polystyrene bead injected into cavity wall 7 - 8 (£/m2)

50mm Woollen insulation batts fixed between the members of timber studwork 7 - 8 (£/m2)

100mm recycled paper insulation laid in poured in between studwork 5 - 6 (£/m2)

150mm recycled paper insulation laid in poured in between studwork 5 - 6 (£/m2)

50mm wood fibre insulation batts fixed between the members of timber studwork 9 - 10 (£/m2)

25mm expanded polystyrene boards fixed with adhesive to walls 8 - 9 (£/m2)

25mm fire resisting expanded polystyrene boards fixed with adhesive to walls 9 - 10 (£/m2)

600 mm wide straw bale infil, fixed with wooden stakes, rendered both sides with cement lime render on expanded metal mesh, painted with lime wash externally and emulsion internally 81 - 91 (£/m2)

75mm thick overall insulation system to external face of solid masonry wall, 50mm thick PIR rigid insulation board fixed mechanically to wall, alkaline resistant reinforcing mesh, 20mm thick 3 coat render, microporous external emulsion paint 51 - 58 (£/m2)

100mm thick overall insulation system to external face of solid masonry wall, 75mm thick PIR rigid insulation board ditto 58 - 65 (£/m2)

Thermal insulation to ceilings and roofs

200mm glass fibre insulation quilt laid between roof joists 9 - 10 (£/m2)

100mm glass fibre insulation quilt laid over joists or above suspended ceiling grid 6 - 7 (£/m2)

Multi-layer foil quilt insulation fixed to sloping soffit of rafter (use in conjuction with traditional insulation) 10 - 11 (£/m2)

60mm thick PIR rigid insulation board with low emissivity composite foil facings on both sides, laid loose 13 - 15 (£/m2)

100mm thick ditto 25 - 28 (£/m2)

96mm foil faced PIR rigid insulation board, bonded to a facing of 5.5mm WBP exterior grade plywood 29 - 32 (£/m2)

116mm ditto 29 - 33 (£/m2)

Warm roof insulation to pitch roof, comprising 100mm PIR rigid insulation board fixed between rafters and 25mm to underside of sloping rafters 24 - 27 (£/m2)

Warm roof insulation to pitch roof, comprising 120mm PIR rigid insulation board fixed between rafters and 20mm to underside of sloping rafters 28 - 32 (£/m2)

Acoustic insulation to floors

Impact absorbing rubber sheet, 5mm thick, placed on floated concrete surface as base for cementatious screed, turned up at edges, lapped and taped joints. (Check flooring density to ensure compliance) 22 - 24 (£/m2)

18 mm thick chipboard on and including Gypframe 70 SB 65 steel battens @ 400 mm centres with 25 mm accoustic insulation between battens 36 - 40 (£/m2)

18 mm thick chipboard on and including 12.5 mm Soundbloc boarding and Gypframe 50 SB 65 steel battens @ 400 mm centres 40 - 45 (£/m2)

Acoustic insulation to walls

27mm ‘Silent board’ cement/gypsum composite acoustic insulating board, with a polymeric core, and fire resisting expanded polystyrene fixed with and including resilient bars to walls 40 - 45 (£/m2)

15mm ‘GTEC dB’ heavy duty wallboard with dense high purity gypsum core between two high quality paper liners, fixed with galvanised nails to softwood, joints filled taped and flush jointed, nail or screw heads filled with joint filler, slurry coat to surface, ready for decoration 32 - 35 (£/m2)

50mm glass fibre sound deadening quilt fixed between timber partition members 11 - 13 (£/m2)

Independent internal sound resisting framework built away from existing wall insulated with sound deadening quilt, resilient wall bars and 2 layers of 15mm ‘GTEC’ heavy duty boarding, top layer taped and jointed for slurry coat to surface, ready for decoration 67 - 75 (£/m2)

Acoustic insulation to ceilings and roofs

25mm acoustic pads, mineral fibre totally enclosed in 250 gsm black polythene with heat sealed edges, laid in suspended ceiling grid 8 - 9 (£/m2)

60mm ‘Noisestopper’ acoustic pads, mineral loaded sound barrier mat encapsulated within an aluminised, non-flammable Class 0 foil 27 - 31 (£/m2)

 

Have your say

You must sign in to make a comment.

The searchable digital buildings archive with drawings from more than 1,500 projects

AJ newsletters