I'm just about to tile my bathroom floor. I'm going to be using fairly
large tiles (408x408mm) and I'm conscious of the risk of the tiles
cracking if there is any flexing of the chipboard.

I was planning to use a plastic substrate matting that the guy in the
tiling shop recommended but the other day I had the plasterer in to do
some work in the bathroom and he reckoned I'd be better off gluing and
screwing sheets of 12mm plywood to the chipboard and laying the tiles on
top with a flexible adhesive. I must admit it sounds like good advice
although I'm a bit worried about raising the height of the floor too
much.

Any advice appreciated.

--
Paul Giverin

British Jet Engine Website http://www.britjet.co.uk

Paul Giverin wrote:
I'm just about to tile my bathroom floor. I'm going to be using fairly
large tiles (408x408mm) and I'm conscious of the risk of the tiles
cracking if there is any flexing of the chipboard.

I was planning to use a plastic substrate matting that the guy in the
tiling shop recommended but the other day I had the plasterer in to do
some work in the bathroom and he reckoned I'd be better off gluing and
screwing sheets of 12mm plywood to the chipboard and laying the tiles on
top with a flexible adhesive. I must admit it sounds like good advice
although I'm a bit worried about raising the height of the floor too
much.

Any advice appreciated.


chipboard on the floor of a bathroom is dodgy at the best of times
because a leaking joint will go unnoticed until the bath falls through
the soggy chipboard.
tiling is short term cover. the chipboard just soaks up water and if
you cover it, it will never dry but rot more.

In message .com,
writes

Paul Giverin wrote:
I'm just about to tile my bathroom floor. I'm going to be using fairly
large tiles (408x408mm) and I'm conscious of the risk of the tiles
cracking if there is any flexing of the chipboard.

I was planning to use a plastic substrate matting that the guy in the
tiling shop recommended but the other day I had the plasterer in to do
some work in the bathroom and he reckoned I'd be better off gluing and
screwing sheets of 12mm plywood to the chipboard and laying the tiles on
top with a flexible adhesive. I must admit it sounds like good advice
although I'm a bit worried about raising the height of the floor too
much.

Any advice appreciated.


chipboard on the floor of a bathroom is dodgy at the best of times
because a leaking joint will go unnoticed until the bath falls through
the soggy chipboard.
tiling is short term cover. the chipboard just soaks up water and if
you cover it, it will never dry but rot more.


The entire first floor is chipboard. Its been like that since it was
built 20 years ago. I believe its pretty much standard these days. I
don't have any problems with leaky joints and I'm not covering up any
damp chipboard. The floor will be waterproof once it is tiled.


--
Paul Giverin

British Jet Engine Website http://www.britjet.co.uk

"Paul Giverin" wrote in message
...
In message .com,
writes

Paul Giverin wrote:
I'm just about to tile my bathroom floor. I'm going to be using fairly
large tiles (408x408mm) and I'm conscious of the risk of the tiles
cracking if there is any flexing of the chipboard.

I was planning to use a plastic substrate matting that the guy in the
tiling shop recommended but the other day I had the plasterer in to do
some work in the bathroom and he reckoned I'd be better off gluing and
screwing sheets of 12mm plywood to the chipboard and laying the tiles on
top with a flexible adhesive. I must admit it sounds like good advice
although I'm a bit worried about raising the height of the floor too
much.

Any advice appreciated.


chipboard on the floor of a bathroom is dodgy at the best of times
because a leaking joint will go unnoticed until the bath falls through
the soggy chipboard.
tiling is short term cover. the chipboard just soaks up water and if
you cover it, it will never dry but rot more.


The entire first floor is chipboard. Its been like that since it was built
20 years ago. I believe its pretty much standard these days. I don't have
any problems with leaky joints and I'm not covering up any damp chipboard.
The floor will be waterproof once it is tiled.

Tiled floors of kitchen, utility room and two bathrooms - all had chipboard
floors, and I nailed 6mm ply on top (nail every 10cm or so, and make sure
there is no movement in the chipboard first. I know that most experts here
recommend 12 or 18mm ply, but this was done on the advice of a very good
friend who does this for a living (self employed). According to him he had
done this for nearly ten years and has yet to be asked back to a job (and I
fully trust him). Just make sure you use Wide Gap Flexible Adhesive (Topps
Tiles do them and I am sure many others).

Hope this helps.

JoeJoe wrote:
"Paul Giverin" wrote in message
...
In message .com,
writes
Paul Giverin wrote:
I'm just about to tile my bathroom floor. I'm going to be using fairly
large tiles (408x408mm) and I'm conscious of the risk of the tiles
cracking if there is any flexing of the chipboard.

I was planning to use a plastic substrate matting that the guy in the
tiling shop recommended but the other day I had the plasterer in to do
some work in the bathroom and he reckoned I'd be better off gluing and
screwing sheets of 12mm plywood to the chipboard and laying the tiles on
top with a flexible adhesive. I must admit it sounds like good advice
although I'm a bit worried about raising the height of the floor too
much.

Any advice appreciated.

chipboard on the floor of a bathroom is dodgy at the best of times
because a leaking joint will go unnoticed until the bath falls through
the soggy chipboard.
tiling is short term cover. the chipboard just soaks up water and if
you cover it, it will never dry but rot more.

The entire first floor is chipboard. Its been like that since it was built
20 years ago. I believe its pretty much standard these days. I don't have
any problems with leaky joints and I'm not covering up any damp chipboard.
The floor will be waterproof once it is tiled.

Tiled floors of kitchen, utility room and two bathrooms - all had chipboard
floors, and I nailed 6mm ply on top (nail every 10cm or so, and make sure
there is no movement in the chipboard first. I know that most experts here
recommend 12 or 18mm ply, but this was done on the advice of a very good
friend who does this for a living (self employed). According to him he had
done this for nearly ten years and has yet to be asked back to a job (and I
fully trust him). Just make sure you use Wide Gap Flexible Adhesive (Topps
Tiles do them and I am sure many others).

Hope this helps.




Conversely, I didn't use any ply, in a 1st floor bathroom / chipboard
floor. 2 days later it all came up to be replaced with spare laminate I
had in the attic.

Mike Dodd wrote:
JoeJoe wrote:
"Paul Giverin" wrote in message
...
In message .com,
writes
Paul Giverin wrote:
I'm just about to tile my bathroom floor. I'm going to be using fairly
large tiles (408x408mm) and I'm conscious of the risk of the tiles
cracking if there is any flexing of the chipboard.

I was planning to use a plastic substrate matting that the guy in the
tiling shop recommended but the other day I had the plasterer in to do
some work in the bathroom and he reckoned I'd be better off gluing and
screwing sheets of 12mm plywood to the chipboard and laying the
tiles on
top with a flexible adhesive. I must admit it sounds like good advice
although I'm a bit worried about raising the height of the floor too
much.

Any advice appreciated.

chipboard on the floor of a bathroom is dodgy at the best of times
because a leaking joint will go unnoticed until the bath falls through
the soggy chipboard.
tiling is short term cover. the chipboard just soaks up water and if
you cover it, it will never dry but rot more.

The entire first floor is chipboard. Its been like that since it was
built 20 years ago. I believe its pretty much standard these days. I
don't have any problems with leaky joints and I'm not covering up any
damp chipboard. The floor will be waterproof once it is tiled.

Tiled floors of kitchen, utility room and two bathrooms - all had
chipboard floors, and I nailed 6mm ply on top (nail every 10cm or so,
and make sure there is no movement in the chipboard first. I know that
most experts here recommend 12 or 18mm ply, but this was done on the
advice of a very good friend who does this for a living (self
employed). According to him he had done this for nearly ten years and
has yet to be asked back to a job (and I fully trust him). Just make
sure you use Wide Gap Flexible Adhesive (Topps Tiles do them and I am
sure many others).

Hope this helps.




Conversely, I didn't use any ply, in a 1st floor bathroom / chipboard
floor. 2 days later it all came up to be replaced with spare laminate I
had in the attic.

Got chipboard in all upstairs bathrooms. Tiled direct. No probs with a
THICK bed of flexible cement. Unless yu have a long term leak and non
waterproof grout.

Doesn;t destroy the chip, but it swells enough to crack the tiles off.