Need a plan for electric UFH

[ericmark]

I band jacked the concrete floor up and put 9 inches of polystyrene then plywood, and then the heater then the tiles, the floor once insulated did not really need under floor heating.

There are two types, resistive wire which need sensors to stop overheating and chemical which is self-regulating to a reasonable level, the main one is Raychem. Since I was doing a bathroom to use Raychem it would need an earth mat on top, and in a bathroom no furniture so no worry about over heating due to something placed on the floor, so did not use Raychem but a cheap and nasty one.

The sensor failed, and got stuck in the pocket, so it was good by underfloor heating.

 

[ZakUK]

Tape a piece of polythene to the floor for a day or two and check if moisture condenses on the underside.

Question Tape it loosely so it stays in one spot or tape it around to make sure no air gets in/under ?

 

[lostinthelight]

Vacuum to remove dust and seal it with duct tape around the perimeter

 

[ericmark]

I hate hard floors, there is however no real option with a wet room where the floor will get wet, I had to tile over the heating element, but in other rooms it depends on the type of electric under floor heating installed read the info about Raychem some versions you can put any floor finish over it, others you can't, so there is no one answer covers all.

 

[ZakUK]

Vacuum to remove dust and seal it with duct tape around the perimeter

2 days gone, all dry underneath ...
I'm thinking to replace my hardwood floor with engineered wood instead of tiles now ...