Brockway Landmark River has a published TOG value of 1.4. 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 Landmark River TOG value and underfloor heating

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

1.52.5
1.4TOG
Suitable for UFH

Leaves 1.1 TOG of the combined budget for the carpet on top before the 2.5 TOG limit is reached.

PassMarginalFail
Published value
RangeBrockway Landmark River
Construction100% wool waffle loop
TOG rating1.4 TOG
Max underlay TOG for UFH2.1 TOG

Brockway Landmark River is a 100% wool waffle loop with a published TOG value of 1.4. Landmark River is the textured waffle-loop Landmark, 100% wool rated 1.4 TOG. Its resistance keeps it in range for underfloor heating with the right low-TOG underlay.

Using the UHMA rule, in-situ resistance is carpet plus underlay minus 1. To keep Brockway Landmark River under the 2.5 TOG limit the underlay must be no more than 2.1 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 Landmark River with Duralay Technics 5combined 0.96 TOGBrockway Landmark River with Duralay Heatflow for Carpetcombined 1.15 TOGBrockway Landmark River with Tredaire King (Duralay King)combined 1.2 TOGBrockway Landmark River with Duralay Durafit 650combined 1.5 TOGBrockway Landmark River with Tredaire Softwalkcombined 3.09 TOGBrockway Landmark River with Tredaire Dreamwalkcombined 3.53 TOG

Questions and answers

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

Brockway Landmark River

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

100% wool waffle loop

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

1.4 TOG

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

2.1 TOG