raising floor

[ms.tiles]

Hi All

i did a bathroom floor nearly 6 months ago, the plumber laid 18mm ply on the floor over the joists and added more supports. the floor was solid with loads of screws all over it.
i then laid electric underfloor heating single wire and tiled on top,plenty of weber rapid set flexible addy.
The plumber called me today to say the customer has said the floor is raising up,about 4 weeks ago he said the door was catching on the floor and thought the door might of dropped a bit but now its worse.

Ive never had this before and have to go with the plumber tomorrow to look at it, would like some info to go armed with if anybody has come across this before.

i did the job in October last year.

many thanks

MS .tiles

 

[Gall.B]

So you didnt cover the matt with slc before tiling?

Was there expansion gaps in the boards?

Wher the boards primed front back and sides?

Did the punter wait 2 weeks before turning on UFH?

 

[Mike]

sounds like another reason as why not to tile direct onto ply:mad2:

 

[ms.tiles]

hi
i normally cover the underfloor heating with tile adhesive with a grout float and then tile on top,flexible addy.
i primed ply
slight gaps between ply
i told them not to turn on heating for a couple of weeks.
dont know if they turned it on or not due to not being there.

if the tiles are still stuck to the ply then would it due to the ply and heating being on to early, is there anyway of telling the heating was put on to early??

why does everybody recommend ply if its not that good to tile on to,is it just because it strengthens the floor better??
wont know until we get there but he hasnt mentioned the tiles being loose just the floor raising a bit.
i wanted to use insulation boards but it would of raised the floor to high so everybody was against them if i remember right.

thanks for the replies

 

[doug boardley]

possibly the ply has warped.

 

[Mike Mike]

hi
i normally cover the underfloor heating with tile adhesive with a grout float and then tile on top,flexible addy.
i primed ply
slight gaps between ply
i told them not to turn on heating for a couple of weeks.
dont know if they turned it on or not due to not being there.

if the tiles are still stuck to the ply then would it due to the ply and heating being on to early, is there anyway of telling the heating was put on to early??

why does everybody recommend ply if its not that good to tile on to,is it just because it strengthens the floor better??
wont know until we get there but he hasnt mentioned the tiles being loose just the floor raising a bit.
i wanted to use insulation boards but it would of raised the floor to high so everybody was against them if i remember right.

thanks for the replies

You've got to ask yourself, and the plumber, whether all the materials used were in accordance with British Standards, and whether the installation work you both did was as per British Standards.

If the answer is YES and YES then it sounds like a discussion between three insurance companies: yours, the householder's and the plumber's.

 

[AliGage]

Can you take some pictures when you're back there so we can continue the discussion after seeing them?

Check the door hasn't dropped a bit as well. If you're like me and take the door off to work in the room then put it back at the end of the day. If you too work like this then the screwholes for the hinge plates might of spread. If you had the door off did you re-drill and plug the hinge screws?

 

[ms.tiles]

hi
the door wasnt on while working,went on after the work was done,total bathroom renovation.
the customer said he put a straight edge on the floor and its not flat anymore so i dont know how much its raised or if theres any damage to the tiles.

 

[charlie1]

Maybe a leak somewhere penetraiting the ply and causing it to expand!Maybe a leak somewhere penetrating the ply and causing it to expand!

 

[The Legend; Phil Hobson RIP]

Sounds like a classic case of thermal shock to me, UHF turned on to soon to high, just my opinion.

 

[charlie1]

If a customer ever does this, how wold you know?

 

[kilty55]

? i would check the door first and foremost.......was the door trimmed to accomodate new floor and if so could it be possible it has swollen at all

i would expect tiles to break or if the ply had warped that badly

 

[Rizzle from the Portizzle]

what kind of ply did you use was it shutting ply or wpb

 

[The Legend; Phil Hobson RIP]

If a customer ever does this, how wold you know?

Hi I had this once, cost me two days labour for good will, Mapei rep took one look at a lifted tile and said "thermal shock" tile had adhesive residue like sand paper on the back. I re-laid the floor foc, even though the customer had told me she could not walk on the floor without slippers. It was a faulty thermostat, and the fact they had whacked the heat on to soon, and to high.

No adhesive will cope with that type of temperature, or the sudden increase, but I spent two days replacing the floor to keep my reputation intact.

 

[kendo1]

That's what I'm doing today and tomorrow, Phil.