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The thermo-efficient qualities of Custompac polystyrene bead make it a versatile wall cavity insulation material. 

For the safety of our customers, our standard bead polystyrene cavity wall insulation is manufactured with a Flame Retardant additive and tested to BS 5852: 1982 Part 2.

All prices include free P&P to Mainland UK (excluding highlands & islands). 

Quantities Available (Cubic feet/Litres): 

1CF/28Ltrs, 2CF/57Ltr, 3CF/85Ltr, 4CF/113Ltr, 5CF/142Ltr, 6CF/170Ltr, 7CF/198Ltr, 8CF/227ltr, 9CF/255tr, 10CF/283Ltr 

Approx bead size (inches/mm): 0.2"/5mm
Please contact us if you live in the following areas as an additional surcharge is required for delivery to the following postcodes:
Scottish Highlands - AB36-38, AB55-56, FK17-21, IV1-39, IV52-54, IV63, KW1-14, PA21-40, PH19-26, PH30-41, PH49-50
Scottish Islands - 2-5 day delivery
Scottish Islands - HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3

80CF - Shipped to mainland UK only - excluding Highlands and Islands


Cavity Wall Insulation

  • Product Code: WCWIV


    Inc. VAT: £4.68

Available Options