What floor finish is suitable for the AmberMat System?

Most floor finishes are suitable for use with underfloor heating providing the floor has been prepared correctly and any manufacturer’s temperature guidelines have been adhered to. With finishes such as wood laminates and carpets it is essential that the heating mat is completely covered with a latex levelling compound before the specified finish is fitted.

The AmberMat is too big for the room, can I cut it?

The AmberMat cannot be shortened as this will alter the resistance of the mat and may cause it to overheat. It is important that the area that requires heating is measured accurately (free floor area only) and that you always round down the measurements.

Which type of mat do I need to order – 100w/m² or 150w/m²?

The 100w/m² mats are for installation on wooden floors. If the wooden floor is ventilated, it is important to have some form of insulation beneath.
150w/m² mats are for installation onto concrete based floors, Amber would always recommend installing some form of insulation beneath.

Can I put AmberMat underneath a bath or shower tray or kitchen units etc?

Amber does not recommend that the AmberMat is installed under any such fixtures for a number of reasons;
• It can inhibit the heat being produced from the system causing it to possibly overheat or damage furniture.
• If ever a fault was to occur, then it would be extremely difficult to carry out a repair.

I have a floor which is made of both timber and concrete. Which AmberMat should I use?

Amber would recommend that each section of floor has its own ‘mat’ and thermostat. If one size mat and thermostat were to be used then where do you install the sensor? In this scenario the floors would deliver uneven temperatures.

How thick does the layer of adhesive/levelling compound need to be?

The adhesive bed has to be thick enough to cover the cables; generally 4-5mm is sufficient.

How long do I have to leave the heating system, after tiling, before switching it on?

Amber would recommend that the adhesive used is allowed to dry/cure naturally and to follow manufacturer’s recommendations.

How long does the heating system take to warm up?

This depends on various factors, such as:

  • What system has been installed?
  • What type of screed has been laid?
  • What depth the floor screed is?

This could be anything from 30 minutes for a AmberMat under tiles to 5-7 hours for a storage system.


How long do I have to leave the heating system, after screeding, before switching it on?

It is recommended that any screed be allowed to cure naturally and this would again depend upon its thickness. Generally the length of time from the screed being laid and the system being switched on is sufficient for it to dry out.

My mat/cable has been damaged or broken. Can I fix it?

Yes. In most cases all mats & cables can be repaired. Amber can provide a full fault finding and warranted repair service.

What is the estimated running cost of the underfloor heating system?

The running cost of a cable or mat is dependant upon its rating/output and is based on the units of electricity consumed. A unit of electricity is 1000watts (1KW) for 1hour at the unit cost of electricity i.e 1500w x Ihr x 15p/unit = 22.5p/hr.

What is the maximum floor finish thickness I can have with AmberMat?

This will depend upon the finish specified.

  • For timber, 20mm for soft wood, 30mm for hard wood and most wood laminates are OK but may need to be treated on merit.
  • Most vinyls are suitable as long as manufacturers temperature limits are adhered to.
  • Carpets and underlays are suitable but the lower the tog rating the better for the system response times.

Is my Amber heating system suitable for use underneath carpets?

Yes, providing the AmberMat is covered with a latex levelling compound first.