TogCheck
Underlay TOG rating

Cormar Pimlico TOG value and underfloor heating

The published Cormar TOG value for Cormar Pimlico and the underlay budget it leaves over a heated floor.

1.52.5
1TOG
Suitable for UFH

Leaves 1.5 TOG of the combined budget for the carpet on top before the 2.5 TOG limit is reached.

PassMarginalFail
Published value
RangeCormar Pimlico
Constructionloop-pile polypropylene
TOG rating1 TOG
Max underlay TOG for UFH2.5 TOG

Cormar Pimlico is a loop-pile polypropylene with a published TOG value of 1. One of Cormar's lowest-TOG carpets at 1.0, which leaves generous headroom for the underlay over underfloor heating.

Using the UHMA rule, in-situ resistance is carpet plus underlay minus 1. To keep Cormar Pimlico under the 2.5 TOG limit the underlay must be no more than 2.5 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.

Underlay pairings
Cormar Pimlico with Duralay Technics 5combined 0.56 TOGCormar Pimlico with Duralay Heatflow for Carpetcombined 0.75 TOGCormar Pimlico with Tredaire King (Duralay King)combined 0.8 TOGCormar Pimlico with Duralay Durafit 650combined 1.1 TOGCormar Pimlico with Tredaire Softwalkcombined 2.69 TOGCormar Pimlico with Tredaire Dreamwalkcombined 3.13 TOG

Sources: Cormar Carpets published carpet TOG values · UHMA guidance on underfloor heating with carpet and underlay (combined-TOG rule)