Why some areas feel cold and what you can do about it.
Underfloor heating is designed to provide even heat across the floor. However, many people experience cold spots in certain areas. In most cases, this is caused by installation issues, system design, or how the system is being used rather than a fault with the heating itself.
Air trapped in the pipes can prevent hot water from circulating properly to certain areas. This is one of the most common causes of cold spots and is usually easy to fix by bleeding the system.
If the pipe spacing is uneven or the layout has gaps, some areas of the floor will naturally be cooler. This is usually an installation issue and can be difficult to fix without major work.
If there is little or no insulation below the heating pipes, a lot of heat can be lost downward instead of rising into the room. This is especially common in older properties with suspended timber floors.
If the system isn’t properly balanced, some loops may receive less hot water than others. This can usually be corrected by adjusting the flow rates on the manifold.
Thick carpets, underlays, or certain types of flooring can reduce heat output in specific areas. This is more common than people realise.
Ask your installer or a heating engineer to bleed the system to remove trapped air. This often resolves cold spots quickly.
Have the flow rates checked and balanced. This is a relatively simple adjustment that can improve performance.
If cold spots appear under carpets or rugs, try thinner floor coverings in those areas to improve heat output.
If basic checks don’t resolve the issue, get an experienced underfloor heating engineer to inspect the system. They can identify whether the problem is design-related or installation-related.
Use our Underfloor Heating Calculator to get a better understanding of what a well-designed system should deliver.
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