Electric underfloor heating for a 6m² bathroom and counter battens

Hello,

I have a bathroom with 6 m², relatively well insulated, one exterior wall, otherwise only interior walls. A small window 1.5 x 0.5 meters.

The floor inside has transverse battens and above them OSB boards, then possibly tiles or laminate or similar.

My question is, which heating do I need? How much would it cost plus a temperature controller and how is it installed? Is it mounted above the OSB board or below? And is this possible without screed or similar, i.e., can the heating for example be placed on the boards and the covering laid over it?

Can any electrician connect the heating? What costs can be expected approximately and is there anything particular to watch out for regarding moisture?

Best regards

far too little information... What kind of house is this? What kind of heating does the house have, how and where is the bathroom? What does relatively well insulated mean? How warm should it be in the bathroom? etc. suw...

Have a look at some freely available explanatory videos on how an underfloor heating system works. Then quite a few things will become clearer to you, for example that OSB above a heating element is not advisable. Also, the combination with laminate flooring is at least unusual, especially in the bathroom. For a rather small bathroom, an infrared mirror heater can also be a good solution.

Hello, thanks I have done that, I did a bit of research and wrote the following post in another forum:

Hello everyone,

thanks for your info! I have tropical disturbances, meaning cold on walls, drafts or radiant heat or cold cause tissue damage for me, so I need a constant temperature in the rooms with neither radiant heat, cold nor drafts, the floor should therefore only be heated to the point that it "radiates cold," although maybe that can also be achieved with sufficient insulation? Tiles are cold, so not optimal, it’s not about a dream bathroom for me, like many here, but it should be a functional bathroom, no mold, nice constant room temperature, I am thinking of heaters possibly additionally on the walls, ideally normal radiators through an instantaneous water heater so that you can cool in summer. I have a Wind Free, but it’s not sufficiently wind free, the split air conditioning. Alternatively, a temporary solution for winter and cold days would be enough for me, i.e. an electric heater. The cost of electricity does not matter to me, I’d rather pay a bit more for electricity than have even more permanent damage, I have suffered enough of that already. For next winter I will have more money and have the summer time to properly do it, preferably under-plaster wall heating/cooling. Maybe it would be helpful to lay pipes that heat/cool the wall? Which would then be plastered over, so thin heating pipes for underfloor heating? Or as a last resort large oil radiators? Those things heat but like an oil radiator always go straight to 1-2 kW, right? So slow heating is less so? For exhaust air I am thinking of Halmburgler or Bayerlüfter.

What do you think?

Pictures will follow. Maybe you can help me a bit, I just need a quick solution to mitigate the tropical disturbances and reduce my skin burning pain so I can calmly plan better later. Living nicely starts with well-being and in my case that means avoiding skin damage and other issues and the pain, so I have peace and time to do it properly later. Money is secondary for now, apart from procurement costs. Instead of tiles maybe PVC flooring? Or perhaps PVC flooring with a tile look? The same for the walls or a coating of that insulating plastic stuff, whose name I can’t recall.

The roof also needs to be sealed, metal roof where it leaks onto the wooden beams, but that’s not the topic here. The roof is rusty and must be redone over the year.

Do you have ideas? Wall heating appeals to me the most, I think I wouldn’t need floor heating if I don’t lay cold tiles? Maybe just PVC tiles and insulation underneath, there is a counter battens and on top OSB, you can stuff glass wool in there, so it should be well insulated? Below is also a heated room, so cold shouldn’t rise up.

I will take the pictures tomorrow. Then maybe more can be said..?

Thanks again for the tips so far! I have now ordered a tub, a toilet and a vanity cabinet and faucet for the bathroom. Whether I as a layman can install that, normally yes... but my muscle strength is not the best. I will have to think about that.

See you tomorrow!

What do you think of something like this?


How do I imagine an infrared heater? Does it radiate a lot of heat? A normal radiator doesn’t get that hot but heats permanently, right? That’s how I’d like the electric one to be. Not heat once, let the room temperature fall 3 degrees and heat again, that’s not good. I would like a constant room temperature and preferably a large surface, ideally a radiator 2x1 meters, maybe a second one, so that I get a little warmth comfortably without burning much oxygen.

Are there such products? I assume infrared radiation is quite strong?

Best regards

Find out where the cold in the walls comes from. In principle, you can heat well with infrared and warm the objects in the surroundings. However, a) this is expensive if the insulation is not adequate (electricity costs as you yourself write) and b) it does not solve any problem of the substance. It is better to address the cause immediately rather than the symptom, as you plan to do in the coming winter.

Hello hampshire,

thanks, yes I definitely have to do that, there is a normal infrared thermometer somewhere, is that enough?

About insulation. Do you think cork is suitable for the wall, also in the bathroom? So first cork, then PVC tiles on top, or something like that. And for one wall, I don’t want tiles in the bathroom, that water-repellent paint.

Do you have such an infrared heating device yourself? I think there is nothing better at the moment? I just wonder if there are some that heat up slowly, an oil radiator for example heats up extremely fast and then cools down quickly, is it the same with these heating things? A radiator heats with low temperature, that’s what I would also like. Maybe a control of the power?