Marble, stone and tiles are normally the best conductors of heat. Use flexible adhesive for the tiles. Oak boards and Plywood will prove to be more resistant for the underfloor heating system.
Carpet and underlay should not exceed 2.5 TOG rating combined. Also, it is best to use 21 mm engineered boards. Never install wood on top of wood as this will provide too much resistance for the wet underfloor heating system to perform. The maximum thickness for a wooden board system is recommended to be 25 mm.
Vinyl work very well with water underfloor heating systems. Just make sure that the floor surface temperature do not exceed 26 degree C. You should also check that the glue will work with underfloor heating.
It is important to watch out for the moisture content when using wooden boards with underfloor heating water systems (http://www.underfloorheatingsystems.co.uk). This should be between 8 – 10 %. The moisture content for the screed must be very low before the wooden boards are fitted on top of the screed.
Finally it's always worth checking with the manufacturer of any floor finish that it will work with wet underfloor heating.
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We offer high quality warm water underfloor heating systems, no matter whether the project is a small extension or a renovation or a large new build and our technical team has many years of experience in all types of underfloor heating.