Brockway Gatsby has a published TOG value of 1. 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 Gatsby TOG value and underfloor heating

The published Cormar TOG value for Brockway Gatsby 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
RangeBrockway Gatsby
Construction100% wool twist
TOG rating1 TOG
Max underlay TOG for UFH2.5 TOG

Brockway Gatsby is a 100% wool twist with a published TOG value of 1. Gatsby is a 100% wool twist and, at 1.0 TOG, one of the lowest-resistance wool carpets Brockway publish. It leaves generous underlay headroom over a heated floor.

Using the UHMA rule, in-situ resistance is carpet plus underlay minus 1. To keep Brockway Gatsby 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
Brockway Gatsby with Duralay Technics 5combined 0.56 TOGBrockway Gatsby with Duralay Heatflow for Carpetcombined 0.75 TOGBrockway Gatsby with Tredaire King (Duralay King)combined 0.8 TOGBrockway Gatsby with Duralay Durafit 650combined 1.1 TOGBrockway Gatsby with Tredaire Softwalkcombined 2.69 TOGBrockway Gatsby with Tredaire Dreamwalkcombined 3.13 TOG

Questions and answers

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

Brockway Gatsby

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

100% wool twist

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

1 TOG

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

2.5 TOG