What Is Tog Rating Carpet

The name comes from the informal word.

What is tog rating carpet.

A low rating is perfect for use with under floor heating while a high rating means the carpet and underlay already offer good insulation and therefore isn t suitable for under floor heating. Tog ratings all our wool wool blend and polypropylene carpets meet the requirements for underfloor heating with tog values well within the recommended tolerances. Put simply the higher the tog rating the greater the insulation. Every home is different so ask our experts in store to help you understand exactly what it is you need.

In more technical terms a tog equates to ten times the temperature difference measured in c between two surfaces of a given material when the flow of heat is equal to one watt per square meter. Therefore in the case of a flooring underlay the tog rating refers to the difference in temperature between the top and bottom layers. If using underlay with underfloor heating you won t need anything above a total rating of 2 5 tog. We recommend that the combined tog rating of carpet and underlay doesn t exceed 2 5.

We provide the tog rating for all our carpets on the carpet ranges page. A tog rating indicates the effectiveness of a materials heat insulation. Tog means thermal overall grade. Wool carpets have a higher tog rating naturally than other fibers as do foam underlays over felts.

To determine a working approximation the tog rating of both carpet and underlay should be added together and 1 0 tog subtracted. There are many factors that contribute to an individual carpets or underlays tog rating. The higher a material s tog rating the more effective it will be at retaining heat and the better it will be as an insulating material. Carpet at 1 70 underlay at 1 40 1 70 1 40 1 0 2 10 tog suitable for floors 2 11 tog and.

Underlays come with a tog rating the higher the tog the better the insulation. Both the carpet and the underlay will have a separate tog rating and a combined rating over 2 0 isn t really suitable for underfloor heating. 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. The tog of the carpet tells you how insulated it is generally the lower the tog the less insulation it provides so opt for a low tog carpet if you have underfloor heating.

Extensive research has shown that this calculation gives a more realistic value of the total tog value. Higher tog carpet combined with underfloor heating is no disaster it will simply slow the heat transfer from the heating system to the room above.