underfloor heating on bitumen floor

[Gslack]

hey guys

In 2 minds wether to put underfloor heating in my kitchen. I've currently got a bitumen floor which I've read you cannot put it directly onto the floor. Now will 6mm boards be ok to put down then lay it on top of that? (trying to minimise the height of the finished floor level).

Is it even worth having underfloor heating and what sort of difference does it make to room temperature? whats the costs involved with running it?

Thanks

 

[Dave]

IMHO , 10mm min thickness for reduction In heat loss.

 

[Qwerty]

10mm insulation boards are better, but 6mm will be fine (obviously not so efficient).
I have electric UFH in all of my bathrooms, kitchen & hallway (all hard floors) and wouldn't ever be without it.
I don't notice the running costs as I'm not using it as a sole heating source, more secondary.
Try this to calculate potential running costs....
Electric Underfloor Heating Cost | Warmup

 

[Qwerty]

Don't forget to deal with the bitumen first. Search for "slurry coat" on the forum for guidance

 

[Dan]

As said 10 better than 6, but having something compared to nothing is a massive difference. You don't want to heat the subfloor.

Www.uheat.co.uk sponsor the forum give them a shout. They're actual electricians so know what they're talking about.

 

[Gslack]

I'm sort of weighing up the pros and cons but at the min I'm swaying towards not having it. Can you tile straight onto bitumen?

 

[Dave]

I'm sort of weighing up the pros and cons but at the min I'm swaying towards not having it. Can you tile straight onto bitumen?

You can when prepped properly.

 

[Gslack]

I'm not going to be carrying out the tiling but obviously want to make sure it's done right. What's the correct stages for it to be prepped?

 

[Qwerty]

Don't forget to deal with the bitumen first. Search for "slurry coat" on the forum for guidance

 

[Old Mod]

U can use this to prep it.

Prime + Grip