Brockway Rare Breeds Loop has a published TOG value of 1.57. 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 Rare Breeds Loop TOG value and underfloor heating

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

1.52.5
1.57TOG
Suitable for UFH

Leaves 0.93 TOG of the combined budget for the carpet on top before the 2.5 TOG limit is reached.

PassMarginalFail
Published value
RangeBrockway Rare Breeds Loop
Construction100% undyed wool loop
TOG rating1.57 TOG
Max underlay TOG for UFH1.93 TOG

Brockway Rare Breeds Loop is a 100% undyed wool loop with a published TOG value of 1.57. Rare Breeds Loop is a 100% undyed wool loop pile rated 1.57 TOG. The loop structure gives a textured, hard-wearing feel and needs a low-TOG underlay over underfloor heating.

Using the UHMA rule, in-situ resistance is carpet plus underlay minus 1. To keep Brockway Rare Breeds Loop under the 2.5 TOG limit the underlay must be no more than 1.93 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 Rare Breeds Loop with Duralay Technics 5combined 1.13 TOGBrockway Rare Breeds Loop with Duralay Heatflow for Carpetcombined 1.32 TOGBrockway Rare Breeds Loop with Tredaire King (Duralay King)combined 1.37 TOGBrockway Rare Breeds Loop with Duralay Durafit 650combined 1.67 TOGBrockway Rare Breeds Loop with Tredaire Softwalkcombined 3.26 TOGBrockway Rare Breeds Loop with Tredaire Dreamwalkcombined 3.7 TOG

Questions and answers

What is the range of the Brockway Rare Breeds Loop TOG value and underfloor heating?

Brockway Rare Breeds Loop

What is the construction of the Brockway Rare Breeds Loop TOG value and underfloor heating?

100% undyed wool loop

What is the tog rating of the Brockway Rare Breeds Loop TOG value and underfloor heating?

1.57 TOG

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

1.93 TOG