Multifoil insulation is made from layers of reflective foil and wadding, so it is thin, light and quick to staple between or over rafters, studs and joists. It works well in pitched roofs, walls, floors, garden rooms and van conversions, and is often combined with PIR boards where space is tight. We stock the SuperFOIL multifoil range at ex-VAT prices.
Multifoil insulation rolls we stock
SuperFOIL SF19+: 45mm multifoil, 1.2m × 10m or 1.5m × 10m rolls, from £97.50.
Prices are per roll, ex VAT. SF19+ 1.2m × 10m covers 12m² before overlaps (£97.50, about £8.13 per m²) and SF19+ 1.5m × 10m covers 15m² (£119.16, about £7.94 per m²). SF6 1.2m × 10m is £65.83 (about £5.49 per m²). Prices at 28 October 2026; allow extra for overlaps, which are at least 50mm.
Does foil insulation work?
Multifoil is thin layers of wadding and reflective foil. For SF19+ the manufacturer quotes a core R-value of 1.63 m²K/W at 45mm thick, rising to 2.53 in a roof, 2.96 in a wall and 4.29 in a floor when it is fitted with air spaces on each side. Those higher figures only apply if the air gaps are built in properly. Foil is not the right choice where you need a simple, predictable U-value from a single board, and PIR boards or mineral wool are better where depth is tight or where you just need thickness. Read our SuperFOIL SF19+ guide and wool vs PIR vs foil.
Why buy from Insulation Warehouse Direct
Every product page shows the ex-VAT price, pack size and coverage, so you can price a job and order online in minutes. For bulk or project quantities, call 03330 908479 or email sales@insulationwarehousedirect.co.uk for a quote.
Delivery
Free delivery from £400 ex VAT, England. Orders arrive on a Moffett lorry with forklift offload, so someone needs to be on site, and we’ll call to arrange a delivery day that suits you. Questions or a large order? Call 03330 908479.
