Brockway Portofino has a published TOG value of 1.47. The underlay TOG it can take and stay under the 2.5 TOG combined limit for underfloor heating.

Updated 05 September 2026.

Underlay TOG rating

Brockway Portofino TOG value and underfloor heating

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

1.52.5
1.47TOG
Suitable for UFH

Leaves 1.03 TOG of the combined budget for the carpet on top before the 2.5 TOG limit is reached.

PassMarginalFail
Published value
RangeBrockway Portofino
Construction100% wool
TOG rating1.47 TOG
Max underlay TOG for UFH2.03 TOG

Brockway Portofino is a 100% wool with a published TOG value of 1.47. Portofino is a 100% wool carpet rated 1.47 TOG. Its resistance means only the lower-TOG underlays keep the combined figure under the limit over a heated floor.

Using the UHMA rule, in-situ resistance is carpet plus underlay minus 1. To keep Brockway Portofino under the 2.5 TOG limit the underlay must be no more than 2.03 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
Brockway Portofino with Duralay Technics 5combined 1.03 TOGBrockway Portofino with Duralay Heatflow for Carpetcombined 1.22 TOGBrockway Portofino with Tredaire King (Duralay King)combined 1.27 TOGBrockway Portofino with Duralay Durafit 650combined 1.57 TOGBrockway Portofino with Tredaire Softwalkcombined 3.16 TOGBrockway Portofino with Tredaire Dreamwalkcombined 3.6 TOG

Questions and answers

What is the range of the Brockway Portofino TOG value and underfloor heating?

Brockway Portofino

What is the construction of the Brockway Portofino TOG value and underfloor heating?

100% wool

What is the tog rating of the Brockway Portofino TOG value and underfloor heating?

1.47 TOG

What is the max underlay tog for ufh of the Brockway Portofino TOG value and underfloor heating?

2.03 TOG