Brockway Landmark Castle has a published TOG value of 1.8. The underlay TOG it can take and stay under the 2.5 TOG combined limit for underfloor heating.
Updated 05 September 2026.
Brockway Landmark Castle TOG value and underfloor heating
The published Cormar TOG value for Brockway Landmark Castle and the underlay budget it leaves over a heated floor.
Leaves 0.7 TOG of the combined budget for the carpet on top before the 2.5 TOG limit is reached.
| Range | Brockway Landmark Castle |
|---|---|
| Construction | 100% wool chunky loop |
| TOG rating | 1.8 TOG |
| Max underlay TOG for UFH | 1.7 TOG |
Brockway Landmark Castle is a 100% wool chunky loop with a published TOG value of 1.8. Landmark Castle is the chunky-loop Landmark, 100% wool rated 1.8 TOG. The deeper loop carries real resistance, so only the lowest-TOG underlays keep it under the combined limit.
Using the UHMA rule, in-situ resistance is carpet plus underlay minus 1. To keep Brockway Landmark Castle under the 2.5 TOG limit the underlay must be no more than 1.7 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 Landmark Castle TOG value and underfloor heating?
Brockway Landmark Castle
What is the construction of the Brockway Landmark Castle TOG value and underfloor heating?
100% wool chunky loop
What is the tog rating of the Brockway Landmark Castle TOG value and underfloor heating?
1.8 TOG
What is the max underlay tog for ufh of the Brockway Landmark Castle TOG value and underfloor heating?
1.7 TOG