Cormar Hampstead Supreme TOG value and underfloor heating
The published Cormar TOG value for Cormar Hampstead Supreme and the underlay budget it leaves over a heated floor.
Leaves 1.2 TOG of the combined budget for the carpet on top before the 2.5 TOG limit is reached.
| Range | Cormar Hampstead Supreme |
|---|---|
| Construction | wool-blend saxony |
| TOG rating | 1.3 TOG |
| Max underlay TOG for UFH | 2.2 TOG |
Cormar Hampstead Supreme is a wool-blend saxony with a published TOG value of 1.3. A wool-blend saxony rated 1.3 TOG. Its thickness makes underlay choice the deciding factor for underfloor heating.
Using the UHMA rule, in-situ resistance is carpet plus underlay minus 1. To keep Cormar Hampstead Supreme under the 2.5 TOG limit the underlay must be no more than 2.2 TOG.
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.
Sources: Cormar Carpets published carpet TOG values · UHMA guidance on underfloor heating with carpet and underlay (combined-TOG rule)