Knauf Brio board anyone tiled on this?

[peckers]

Hi all, has anyone had much experience tiling onto Knauff Brio board? It is a board supplied with there wet underfloor heating system, It is gypsum based and only 6mm thick.

Just wondered if anyone has had any come backs or problems tiling direct onto this type of board?

 

[Stef]

Hi all, has anyone had much experience tiling onto Knauff Brio board? It is a board supplied with there wet underfloor heating system, It is gypsum based and only 6mm thick.

Just wondered if anyone has had any come backs or problems tiling direct onto this type of board?

Tiled 3 ensuite floors on top of Brio 23, I'm more than certain that it was 23mm thick (I think that's what the numbers mean)
It was over the top of wet ufh & as far as I'm lead to believe its meant to be floating, the joiners fitted 2x2 & nailed it every 300mm & filled between them with a semi dry mix (not sure what this was).
It wasn't the greatest of floors to tile to as I could have levelled it before laying but I've not had any come back from it & all is still good, been down nearly a year.

 

[Ajax123]

Brio board is thicker than 6mm isn't it??

 

[peckers]

Brio board is thicker than 6mm isn't it??

The base and the top board togeather is 23mm thick but the top section is only 6mm well it is on the floor i been to look at.

 

[peckers]

The problem i face is that the base has been fitted on top of undulating concrete and screwed to battens at 400mm centres and there is some deflection in the floor. Now if the builders had leveled the concrete before they inserted the Brio base board then there wouldn't have been a problem.

As it is a gypsum based engineered board it is to be treated and tiled onto in the same way you would a gypsum based screed (as specified by the adhesive manufacturer)

Due to it being so far out of level and uneven it needs to be leveled and I would have wanted to overboard it to stop the deflection (Even though it is minimal) but due to having to put 18mm of slc on it i am unable to over board it as there is not enough clearance in the door ways. I would normally use slc and addys specifically made to be used on gypsum but they are not so flexible as cement based products because of the polymers in them. and due to the deflection I have been told that cement based products should be used as they stand a better chance because there is some deflection.

 

[Ajax123]

The problem i face is that the base has been fitted on top of undulating concrete and screwed to battens at 400mm centres and there is some deflection in the floor. Now if the builders had leveled the concrete before they inserted the Brio base board then there wouldn't have been a problem.

As it is a gypsum based engineered board it is to be treated and tiled onto in the same way you would a gypsum based screed (as specified by the adhesive manufacturer)

Due to it being so far out of level and uneven it needs to be leveled and I would have wanted to overboard it to stop the deflection (Even though it is minimal) but due to having to put 18mm of slc on it i am unable to over board it as there is not enough clearance in the door ways. I would normally use slc and addys specifically made to be used on gypsum but they are not so flexible as cement based products because of the polymers in them. and due to the deflection I have been told that cement based products should be used as they stand a better chance because there is some deflection.

Sounds like a bit of an abortion of a job.

 

[peckers]

The problem has been caused by the builders in my view by not leveling the substrate in the first place, If they had thought ahead then they would have seen the issue that this has caused. But then this is normally the case!

 

[One Day]

Builders don't think.

They lack a brain.

 

[TJ Smiler]

Would a fibre reinforced SLC not do the trick? I would have thought that would be more than enough to level and strengthen at the same time?

 

[TJ Smiler]

I meant to say and reduce deflection too mate