Tredaire Brio is rated 2.18 TOG at 8 mm. Whether it works over underfloor heating and which carpets it pairs with under the 2.5 TOG limit.
Updated 05 September 2026.
Tredaire Brio TOG rating and underfloor heating
The published TOG and datasheet figures for Tredaire Brio, and what it means over a heated floor.
Leaves 0.32 TOG of the combined budget for the carpet on top before the 2.5 TOG limit is reached.
| Manufacturer | Interfloor (Tredaire) |
|---|---|
| TOG rating | 2.18 TOG |
| Thickness | 8 mm |
| Density | PU foam |
| Sound | 32 dB impact reduction |
| Underfloor heating | Not suitable |
Brio is an 8 mm PU foam underlay rated 2.18 TOG. That resistance is close to the whole combined limit, so it is a comfort underlay for unheated rooms rather than over underfloor heating.
Because Tredaire Brio is already 2.18 TOG before any carpet is added, no carpet brings the pair back under the 2.5 TOG limit. Over underfloor heating, swap it for a low-TOG underlay instead.
TOG measures thermal resistance, so a low number means heat passes through easily. For a floor covering over underfloor heating that is what you want. A comfort underlay chosen for warmth underfoot does the opposite job and is the usual reason a heated floor underperforms after a carpet goes down.
Questions and answers
What is the manufacturer of the Tredaire Brio TOG rating and underfloor heating?
Interfloor (Tredaire)
What is the tog rating of the Tredaire Brio TOG rating and underfloor heating?
2.18 TOG
What is the thickness of the Tredaire Brio TOG rating and underfloor heating?
8 mm
What is the density of the Tredaire Brio TOG rating and underfloor heating?
PU foam