Underfloor Heating Advice

4 Jan 2006
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United Kingdom

I am about to refit my bathroom, its very cold and I thought I'd take the opportunity to fit underfloor heating.

The floor area is approx 240 x 140cm but its an odd shape as the gable end wall is angled. The internal wall is straight and is 247cm in length, the end walls are 154cm and 132cm, the gable end wall is 244.5cm.

I have been looking at the Klima Underfloor Mats from Screwfix here , are these any good?
This one says tiles, can it be used under laminate flooring? or Lino?
Can anyone recommend anything else?
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That one is for tiles only, it must be embedded into the cement.
Others might be usable under laminate, but laminate in a bathroom is a total bust anyway.
Doubtful any of it would be suitable under vinyl or lino.

Electric UFH is generally feeble at best, costs a fortune to operate and certainly not recommended to actually heat the room.

If the room is cold, then insulate the walls/ceiling/floor and fit a decent sized radiator - not a towel rail since they are useless at heating the room as well.
To make the floor feel warm to walk on, I recommend cork tiles. Then a regular radiator or large towel radiator to heat the air.
if the room is very cold underfloor heating will not work well
electric costs 3 times as much per kw
if your used to one burst off gas central heating am and pm underfloor is useless you turn it on perhaps 2 hrs before you need it even then the room may still be cold if you have a large heat loss
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Screwfix said:
Comfort Heating Only Max floor temperature: 40°C
If you look at reports on UFH this is repeated again and again. At 40°C it simply can't get enough heat into the room, from 20°C to 40°C is just 20°C where from 20°C to 80°C is 60°C three times the value. It does not matter if water or electric it simply can't give out enough heat in most cases to heat rooms without some other form of heating being used as well.

Water is the best as it can maintain 40°C what ever happens to furniture. Chemical electric the next as it does have some local regulation which limits temperature even when floor covered with furniture although not as good as water, but simple resistive is the cheapest to install. However maintenance is a real problem all to often faults mean it just stops working there is no real way to repair it's a case of rip out and install new.

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