F-Ball Hygrometer - Tile Advice

[Diggy]

Hi all ,
M8 of mine is laying some Karndean for me at my Ma's house. Got an F-Ball Hygrometer on the floor and getting a constant 95% reading on it. Not having used one before myself , this strikes me as odd given it's an old floor.
Whats the general modus operandi with these meters , never having had the need to use one myself.

Cheers

Diggy

 

[Stef]

Turn the UFH off if any, let floor cool down, stick the hygrometer on the floor for 24hrs then switch on & take the readings between 48 & 72hrs.

 

[Gazzer]

Have you sealed it to the floor ?
You say its an old floor ? Any DPM ?

 

[steve187]

A link here to laying a liquid DPM, not cheap but for older houses with no DPM or damaged DPM, it could be the answer. but as Sir posted have you sealed to the floor

How we install a liquid or surface Damp Proof Membrane.(DPM) - YouTube

 

[Diggy]

Havent seen it but apparently it is taped to the floor. No ufh. Dont know about DPM , 50s chalet style house , screeded floor. Might have to go and have myself i think.
Cheers

Diggy

 

[Gazzer]

it should be sealed to the floor not taped. You need to create an airtight seal.

 

[Diggy]

OK Cheers SR. Silicone?

 

[Gazzer]

The usually come with butyl tape.

 

[Diggy]

Ah ok .......

Just spoke to F-Ball Tech' to get the low down on the process regarding Karndean installation.

Thnx for all replies.

Cheers

Diggy

 

[Gazzer]

And what was their word ?

 

[Diggy]

As per your post, butyl tape. Then a rec for their liquid dpm , primer,slc.