hello ive just laid my first floor tile in my bathroom the floor is chipboard,i have treated the floor with a pva solution.my problem is i have just realised that i have used the wall adhesive instead of the floor adhesive,is this going to cause any major problems?or am i ok just to carry on using the floor adhesive from now on?any help would be very grateful!!

all sorts wrong there mate, shouldn't tile (imo) directly onto chipboard, deffo not use pva. What was the adhesive? was it ready mixed paste or was it powdered adhesive?

If it's tubbed gear lift them and stick the tiles in a bucket of water to remove the addy........

As above, no pva

Oh dear ,if you can,take them up before the adhesive has set and clean the tiles up or you will definatly have problems,regarding the chipboard as long as there is no movement whatsoever you should be ok but make sure you give the floor another good strong coat,rgds.

can you give me the reasons ,not to tile on the chipboard please,rgds

There are some adhesives that specify they can be tiled directly onto chipboard but there are split opinions as to whether chipboard has the torsional rigidity to withstand tiling or whether there'll be too much movement and overlaying the chipboard eradicates that issue.
Literally all of the jobs I've witnessed tiled directly to chipboard have failed soon after installation - maybe due to incorrect adhesives but can't say for sure. IMHO it's surely better to go belt and braces with a decoupling mat or cement board overlay etc so you know there'll be little or no chance at all of failure.

its a ready mix soluction its kind of white emuslion stuff, surley it doesnt matter what your tiling onto as long as its braced right?also the tiles 600 x 600 so the weight they recieve is sprend better?the wall adhensive is a powder stuff.I was looking for a tile primer in b and q the guy told me you could use a water proof pva mixed at 5 - 1 to seal the chipboard, so you mostly seem to think my flor is going to fail???

The tubbed gear is an air drying material and will probably take forever under the large tiles.

You have powdered for the walls, could you have got the addys mixed up, that would have been fine for the floor

when you are tiling onto p.v.a primed substartes you are tiling onto the p.v.a not whats behind it,if for any reason this comes into contact with water again it will become active(back to it's original wet state) thus causing the tiling to fail,also chipboard has a tendancy to rot with moisture making it unsuitable for tiling,just afew of several reasons why not to use p.v.a and tile onto chipboard

But surley if the floor is sealed properly no water should get under to the chipboard or for that matter pva?also i thought the idea of using watered down pva is that it soaked into the chipboard giving the chipboard a waterproof coating ,so the moisture from the adhensive doesnt get drawn out into the chipboard?.ok what is the cheapest and best way i could cover the chipboard?(with minium thickness)The tile is stuck hard now!what a diaster this is turning into

Chipboard is not structurally stable enough to tile too direct.. it is a particle board and not suitable at all.. PVA..Have read a of this.. P.V.A. Versus Primers

The tile will not be stuck hard.. it will just the the adhesive around the edges.. sort of like a picture frame effect and it does not have enough tensile strength to hold the tiles in situ.. totally wrong adhesive full stop.

It needs to come bacl up and the proper prep done and then suitable adhesive used.

Sorry to be the bearer of bad news but it will fail very quickly as it is.

Chipboard is a composite material and thus can delaminate. This means that it cannot be considered as a stable substrate. Any porous substrates should be primed with an acrylic primer which will penetrate the substrate surface and form a secure bond. PVA is basically wood glue and even when watered down will only form a skin over a substrate so you will only ever be fixing tiles to a wood glue skin and not securely bonding to the substrate.

As for your issues, I would remove the tiles whichever way you can as the dispersion adhesive is unlikely to be dry in the middle of the tile, so once you have broken the bond around the edges, they should come up with little resistance. You would be best to overboard the floor with 6mm cement boards which are fixed with a flexible cement based adhesive and then screwed at 150 to 200mm centres with a 4 x 20mm screw (that way you can be sure that you will not pierce a pipe).
I'm assuming that your tiles are porcelain if they are 600 x 600 so leaving them stuck is not an option as the adhesive you have used is not designed to bond porcelain (it must be flexible).

Sorry, but it is a case of rip it up and start again. And remember, the staff in a DIY shop are trained to sell products, they rarely have construction experience so their advice will only ever be basic.

Sorry,

Daz

hi rossco,if its height you are concerned about lay 6mm cement boards down and tile with a suitable flexible cement bagged adhesive

ok i will try and get the tile up now .would it better to go over the top of the chip board with this concrete board or pull it up and plywood down?also where is the cheapest place to get the concrete board from??and what do you cut it with?

deffo lift up and start again you can buy 6mm cement boards in b&q or 6mm no more ply is a good alternative glued and screwed 200mm centres and a good flexi adhesive is a must good luck!

its strange cos when i spoke to topps tiles today they said laying tiles on chipboard is fine,they also said pva is fine!!if i over lay it with ply wont the problem of flex in the chipboard still be there?or will the ply rigid it up enough?

also would someone in the ipswich, area suffolk be interested in fitting the tiles?

Originally Posted by roscopeco2000

its strange cos when i spoke to topps tiles today they said laying tiles on chipboard is fine,they also said pva is fine!!if i over lay it with ply wont the problem of flex in the chipboard still be there?or will the ply rigid it up enough?

Well that say's a lot for TOPPS Tiles then.. major bad advice..

thank everyone for help,just one more thing if i put the ply onto of the chipboard will this be stable enough then?also do i need to primer ply?

hi ross,is the chipboard currently strong enough? if it has a lot of bounce in it then you need to add dwangs(noggins) to secure it,,over boars it with 6mm cement boards is the best option imo

yeah its def strong enough the guy did a very good job building the carcass its braced every foot in a grid pattern with 2x 3, its also the egger chipboard boards that clip together.

also i have been recommended a decoulping mate i notice you guys didnt mention that,are they any good?


G Mat Uncoupling Membrane 5m GMAT05 - £45.00 - www.protilertools.co.uk

if your just laying tiles onto a cement board you do not need a decoupling mat,

yeah but as a altertive to the cement board?

ross im not being rude here,but are you not just simply tiling a bathroom floor? if so lay a cement board over the chipboard as thats the lowest height ad on you can get and tile direct to the cement board

using a membrane will be more expensive and is unnecessary

iam sorry iam no expert, this isnt my profession!!it actually works out cheaper to have the membrane

hello rossco,what size is your floor?

3 meters squared

Originally Posted by Brian the Tile

Oh dear ,if you can,take them up before the adhesive has set and clean the tiles up or you will definatly have problems,regarding the chipboard as long as there is no movement whatsoever you should be ok but make sure you give the floor another good strong coat,rgds.

a good strong coat of what .............pva

Originally Posted by roscopeco2000

ok i will try and get the tile up now .would it better to go over the top of the chip board with this concrete board or pull it up and plywood down?also where is the cheapest place to get the concrete board from??and what do you cut it with?

its a cement board, if you ask for a concrete board you will get nothing but blank looks