I think your reno guy should keep his opinions to himself. It’s your money and your house. If you can afford it, go for it.

Just want to know, is it really useful?

Heated floors are extremely useful and comfortable, especially in norther climates. If you have the opportunity to install it in all your bathrooms, do it!

Comfortable, yes. Moisture control and energy efficient, not so much.

I think it depends how much time will be spent in the non master bathrooms? Will you put rugs down by the vanity? I have heard they take 10 minutes to heat up.

One day when I remove the slippery tile in my master bathroom, I will want a heated floor. I say go for it at least in the main bathroom.

Just be aware that, if you put in an electric mat under the tile, any problems that develop with the mat will require ripping out the tile to make a repair. Also, these systems do not make the floor or room toasty warm, they just take the chill off if you are walking around in bare feet, and they take a while to warm the floor after they are turned on. Finally, people also make the mistake of extending the mat into the shower floor, falsely thinking that the heat the mat contributes makes a difference; it doesn't...it's insignificant compared to the heat in the shower water. And electrical mats under wet shower floors can pose a shock hazard if there is a break in any of the wires or wire insulation. I'm not saying that you shouldn't do this, but I am saying to keep your expectations modest.

I've not ever seen the attraction of heated floors, so would probably skip them but for the master if you really want them. We wear slippers in the house, step out of the shower onto bath mats and have one in front of the sinks, so practically never touch the floors with bare feet. And I want a toasty bathroom during showers, so want a heat source that can blast on instantly and wouldn't want to wait for some ambient heat from a floor to waft up. Obviously, others love them!

We have it in all of our bathrooms, and generally only run it in the master. Or, we will turn it on 4-8 hours before we have guests, in the guest bathroom and power room. It takes a bit to get the slab up to temperature and stabilized. It’s a luxury, so of course it has additional costs to install and run. If we ever move, we will do it again.

If your electrical panel has as many open slots as you have bathrooms, and you don’t mind spending 2-4K extra per bathroom, plus the added electrical expense to run it, go for it. It’s not energy efficient, and won’t help with moisture problems.

If you have to have a new electrical sub panel added to be able to have that many dedicated circuits, (likely) and that 5-7K is not a comfortable expense, the rest of the added and ongoing expenses likely won’t be comfortable either.

It feels wonderful. Another option to think about is a heat lamp in the ceiling just over the area outside your shower. You turn it on when you get in the shower, and are warm and toasty when you first step out and might be cold otherwise. This option can be used only when needed, though it sounds like heated floors also can be on a switch. The two could be used alone or together. You also could add a heated towel rack just outside the shower. Your space and use will dictate your best options and choices for each room. I like to design each bathroom separately so each fits the intended uses and adjoing spaces. Though I like whole house continuity too. Frankly, I'd like my entire house heated from the floor, because I'm a barefoot person. But I can see there no need to heat the broom closet. And it's hard to justify floor heating under flooring that won't transmit the heat well. So yes, think about what your reno guy is saying, but get what you want in the end.

Do it if you want to. As others said, it doesn't help with moisture or cutting heating bills. But it sure feels great underfoot. Just turned ours on this week and mmmmmmm.

This is our third house that we've installed them. In the first house we didn't put them in ancillary bathrooms (but did heat the kitchen and sunroom floors). In the second one we put them in the (onlyl) main bath and the new powder room we constructed. In our current house we put them in both the master and the hall bath.

Do what you want!

Thank you so much for your advice,it really helps me to make decisions.

Ive never known anyone to regret it. And you don’t have to wait for anything to heat up. Set the thermostat and you are done!

I just ordered NuHeat mats for the owner and guest baths. They’ll be on a 7-day timer. I want my guests to be warm too. We have small baths but they are not expensive. And installation isn’t tricky. Didn’t cross my mind to not have it in the guest bath.