Brockway Dimensions Plain 40 has a published TOG value of 1.34. The underlay TOG it can take and stay under the 2.5 TOG combined limit for underfloor heating.
Updated 05 September 2026.
Brockway Dimensions Plain 40 TOG value and underfloor heating
The published Cormar TOG value for Brockway Dimensions Plain 40 and the underlay budget it leaves over a heated floor.
Leaves 1.16 TOG of the combined budget for the carpet on top before the 2.5 TOG limit is reached.
| Range | Brockway Dimensions Plain 40 |
|---|---|
| Construction | 80% wool wool-blend twist (40 oz) |
| TOG rating | 1.34 TOG |
| Max underlay TOG for UFH | 2.16 TOG |
Brockway Dimensions Plain 40 is a 80% wool wool-blend twist (40 oz) with a published TOG value of 1.34. Dimensions Plain 40 is the 40 oz plain wool-blend twist rated 1.34 TOG, low enough to keep the combined figure in range with a low-TOG underlay over a heated floor.
Using the UHMA rule, in-situ resistance is carpet plus underlay minus 1. To keep Brockway Dimensions Plain 40 under the 2.5 TOG limit the underlay must be no more than 2.16 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 Plain 40 TOG value and underfloor heating?
Brockway Dimensions Plain 40
What is the construction of the Brockway Dimensions Plain 40 TOG value and underfloor heating?
80% wool wool-blend twist (40 oz)
What is the tog rating of the Brockway Dimensions Plain 40 TOG value and underfloor heating?
1.34 TOG
What is the max underlay tog for ufh of the Brockway Dimensions Plain 40 TOG value and underfloor heating?
2.16 TOG