How we compared them
Four criteria: third-party certification and the build-up it assumes; declared thermal resistance with air gaps; the tape and fixing system; and price per square metre at UK merchants. We do not score “quality” — every product here is certified for its stated use. Brand-specific figures change; we give the pattern and tell you to read the current certificate.
| Brand / product | Type | Typical certified use | Notes |
|---|---|---|---|
| SuperFOIL SF19 / SF40 / SF60 | Multifoil, breathable variants available | Roofs, walls, floors; SF40+ for higher-resistance roof build-ups | Large range; approved installer network; product-specific tape |
| SOPREMA SuperQuilt (previously YBS) | Multifoil | Roofs, walls, floors; often combined with PIR | Long-standing UK product, now under SOPREMA UK; widely stocked |
| Actis Triso / Hybris | Multifoil and hybrid honeycomb | Roofs and walls; Hybris as a thicker alternative | System approach with matching breather and VCL products |
| TLX Gold / Silver | Breathable multifoil | Roofs, including as a combined breather membrane | Useful where the roof is being re-covered |
| Generic bubble foil | Radiant barrier | Outbuildings, vans | Not a roof insulation; not certified as one |
The decision, by roof
- Loft room, tiles staying on: any certified multifoil across the rafters, usually with 50mm PIR between. Choose on price and installer familiarity.
- Roof being re-covered: a breathable multifoil that doubles as the membrane can save a layer.
- Floor between joists: a standard multifoil draped and stapled; brand matters little.
- Garage or shed: the cheapest product that will stay up.
Pick the build-up, then the brand
Check my homeWe tell you what your roof needs. The installer quotes the product that meets it.
What to ignore
“Equivalent to 200mm of mineral wool” claims without a certificate reference. Reviews from people who fitted it in a shed and were pleased it was shiny. Any product whose data sheet does not state the air gaps its performance assumes.
Questions homeowners ask
Is SuperFOIL better than SuperQuilt?
They are close competitors with similar certified applications. See our head-to-head. Choose on the certified build-up for your roof, stock availability and installer experience.
Which foil insulation has the highest R-value?
Thicker multifoils such as SuperFOIL SF60 or Actis Hybris claim the highest standalone resistance. Always read the tested build-up: the air gaps and any PIR are part of the number.
Sources and when they were last checked
- SuperFOIL — product range — checked 2 September 2026