Adhesive not bonded to tile help!

[newbietiler]

I have a problem with a

600 x 600 Porcelain Tile (BQ)

on

Rapid Setting Flex Grey Adhesive (Excelbond) - TCH

with Underfloor heating - TOPPS

on PVA Primed 9mm Ply (screwed every 150mm)

on Rapid Set Flex Grey Adhesive (Excelbond)) with PVA

on a 25mm chipboard floor.


why have the tiles come loose (lifted) 8 months after being fitted ????????? I think it must be the adhesive ?????????

 

[Andy Allen]

shouldn't have used P.V.A

 

[tommyzooom]

PVA is a big no no,
There's a lot of layers there, which part has failed, ie: is the adhesive still stuck to the floor, or the tile?

 

[newbietiler]

adhesive still stuck to the floor nothing stuck to the tile

 

[newbietiler]

No adhesive on back of tile at all ?????

PVA is a big no no,
There's a lot of layers there, which part has failed, ie: is the adhesive still stuck to the floor, or the tile?

 

[kilty55]

hi newbie,how thick/wet /dry was the adhesive mix you used

did you back butter the tiles i assume not

are all the tiles lifting?
the one saving grace if they are lifting intact is you can re use them
is the adhesive well stuck to the substrate?

 

[Spud]

floating floor or suspended how big is the area?

 

[newbietiler]

the adhesive is not budging from the subtrate and there is a good print of the back of the tile, just a thought but excelbond flex adh are suitable for porcelain aren't they ? just got an element of doubt ???

 

[newbietiler]

total area is 20m2

 

[Spud]

does the adhesive show any spider web like cracks on it ?

 

[newbietiler]

didnt back butter

tiles lifting mainly around toilet but its completely dry, I do think they will pull up easily enough though

 

[newbietiler]

there are cracks where the UFH is ? but this is pretty normal aint it ? they are slight and customer didnt put UFH on for 2 months (she says)

 

[newbietiler]

the chipboard is screwed to joists too by the way

 

[Ian]

I think the lack of back buttering is the issue here or maybe the adhesive was a bit dry?

 

[Spud]

was the chipboard tongue and groove and was it screwed down to the joists ?,the ply wood you have over laid its very thin tbh the spider web cracking normally means one of 2 things excessive bounce in the floor or the under floor heating was turned up too quickly the tiles will come off perfectly clean if either has occured