To determine a working approximation the tog rating of both carpet and underlay should be added together and 1 0 tog subtracted.
Tog value carpet.
Carpets with a lower tog rating are ideal for rooms with underfloor heating whereas higher tog ratings are better for typically colder areas.
Extensive research has shown that this calculation gives a more realistic value of the total tog value.
Carpet at 1 70 underlay at 1 40 1 70 1 40 1 0 2 10 tog suitable for floors 2 11 tog and.
A tog is the unit of measurement we use to show a material s or carpet s thermal insulating property.
If you re thinking about installing underfloor heating in your home it s important to know if your carpet is suitable.
Every home is different so ask our experts in store to help you understand exactly what it is you need.
In short form the higher the tog value material or carpet has the more it will retain heat and the better it will be at insulating.
The name comes from the informal word.
Typical brintons 80 wool 20 nylon carpets have a tog value 1 4 and 2 3.
Put simply the higher the tog rating the greater the insulation.
The tog is a measure of thermal insulance of a unit area also known as thermal resistance it is commonly used in the textile industry and often seen quoted on for example duvets and carpet underlay.
What is carpet tog.
The shirley institute in manchester england developed the tog as an easy to follow alternative to the si unit of m 2 k w.
Tog means thermal overall grade.
At cormar we help guide our customers by pre testing all our carpets and giving them a tog value rating to make sure they are compatible with underfloor heating systems.
A material with a high tog value would make an excellent winter coat as it would retain a large proportion of your body s heat while wearing it while a coat manufactured from a low tog rated material would be better suited for use in warmer seasons as it would allow a far greater amount of your body s heat to radiate away while being worn.
We can offer the following information which has been taken from test reports in accordance with bs 4745 two plate test from bttg shirley manchester.