Brockway Dimensions Heathers 40 has a published TOG value of 1.31. The underlay TOG it can take and stay under the 2.5 TOG combined limit for underfloor heating.
Updated 05 September 2026.
Brockway Dimensions Heathers 40 TOG value and underfloor heating
The published Cormar TOG value for Brockway Dimensions Heathers 40 and the underlay budget it leaves over a heated floor.
Leaves 1.19 TOG of the combined budget for the carpet on top before the 2.5 TOG limit is reached.
| Range | Brockway Dimensions Heathers 40 |
|---|---|
| Construction | 80% wool wool-blend twist (40 oz) |
| TOG rating | 1.31 TOG |
| Max underlay TOG for UFH | 2.19 TOG |
Brockway Dimensions Heathers 40 is a 80% wool wool-blend twist (40 oz) with a published TOG value of 1.31. Dimensions Heathers 40 is the 40 oz weight of Brockway's flecked wool-blend twist, rated 1.31 TOG. The lighter pile keeps its resistance low enough to pair with most underfloor-heating underlays.
Using the UHMA rule, in-situ resistance is carpet plus underlay minus 1. To keep Brockway Dimensions Heathers 40 under the 2.5 TOG limit the underlay must be no more than 2.19 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.
Questions and answers
What is the range of the Brockway Dimensions Heathers 40 TOG value and underfloor heating?
Brockway Dimensions Heathers 40
What is the construction of the Brockway Dimensions Heathers 40 TOG value and underfloor heating?
80% wool wool-blend twist (40 oz)
What is the tog rating of the Brockway Dimensions Heathers 40 TOG value and underfloor heating?
1.31 TOG
What is the max underlay tog for ufh of the Brockway Dimensions Heathers 40 TOG value and underfloor heating?
2.19 TOG