Chipboard floor

[beanz]

What's the reason for that Andy?

 

[Andy Tiler]

What's the reason for that Andy?

Sticks better!! More elastic.Evan Schluter recommend it?

 

[beanz]

Sticks better!! More elastic.Evan Schluter recommend it?

ok mate, cheers for that

 

[thompsonbrown]

Good afternoon

went to look at a job this morning. 4 upstairs bathrooms including a loft extension bathroom and all of the floors are the wonderful 22mm moisture resistant chipboard straight onto the joists. All the floors are solid so no deflection issues. It's been explained that it needs overboarding which he understands. My question is, is if I use hardie backer or an insulation board like marmox glued and screwed am I right in thinking that it's really only the screws holding the board down as the adhesive doesn't adhere to the chipboard or am I way off the mark.
Also what would you guys recommend using in this situation.

Thanks in advance

The Glue or adhesive (dependent on board manufacture) is the main sorce of contact for the board. The screws will help but are also there to hold the board in place while the glue/adhesive set.
Prime the floor first as this will adhere to chipboard, then your glue/adhesive will adhere to your primer.
Hope this makes sence as i'm having a few beers repling to this, while the missis is out.:lol:

 

[Andy Tiler]

The Glue or adhesive (dependent on board manufacture) is the main sorce of contact for the board. The screws will help but are also there to hold the board in place while the glue/adhesive set.
Prime the floor first as this will adhere to chipboard, then your glue/adhesive will adhere to your primer.
Hope this makes sence as i'm having a few beers repling to this, while the missis is out.:lol:

A lot of adhesive company's don't recommend priming timber now!so always check with the adhesive manufacturer beforehand

 

[rj1884]

Thanks for your replies. Andy I was told not to use af200 on chipboard only on ply. I take it you've done this many times before. I'm thinking to be on the safe side I would still over board then ditra. What's your thoughts on this.

 

[Andy Tiler]

Thanks for your replies. Andy I was told not to use af200 on chipboard only on ply. I take it you've done this many times before. I'm thinking to be on the safe side I would still over board then ditra. What's your thoughts on this.

As you I would always overboard!cement board is always the best substraight to tile on to. If it's not recommended then I wouldn't use it!
I always make the phone call if I'm unsure?
Hope that helps?
Cheers Andy

 

[thompsonbrown]

A lot of adhesive company's don't recommend priming timber now!so always check with the adhesive manufacturer beforehand 

Intrested in your advice.
always prime my floors usally use granfix adhesive.
Which adhesive manufacturers dont ask chipboard floor to be primed?
Not saying your wrong, just interested.

 

[rj1884]

Cheers Andy. Can ditra be used on top of hardie. I know it can on marmox. Has anyone used it on hardie.

 

[Andy Tiler]

Intrested in your advice.
always prime my floors usally use granfix adhesive.
Which adhesive manufacturers dont ask chipboard floor to be primed?
Not saying your wrong, just interested.

I don't tile straight onto chipboard! It's to risky
I use Tilemaster adhesive for everything!
..

 

[Andy Tiler]

Cheers Andy. Can ditra be used on top of hardie. I know it can on marmox. Has anyone used it on hardie.

Can't see why not it's cement based?but best to ask Schluter!

 

[Andy Tiler]

Intrested in your advice.
always prime my floors usally use granfix adhesive.
Which adhesive manufacturers dont ask chipboard floor to be primed?
Not saying your wrong, just interested.

If you use gran fix just follow there spec? that way you can offer a guarantee..

 

[rj1884]

Cheers Andy. I've spoken schulter and they said you can ditra over hardie backer. Can I just you all this question for my piece of mind. I mentioned to the customer about putting ditra over the backer board to assist with the movement of the floor as it's a new build and the substrate is chipboard. This option was questioned straight away by the customer who just so happens to be a builder. Am I right in thinking that this would be the best course of action in this scenario or am I being to cautious. I'd rather be cautious then not. There may be an issue with height as the first plumbing fixing has already been done.
Thanks in advance.

 

[beanz]

I'd be interested to hear everyone's thoughts on this too.. My understanding is that it's unnecessary, but I've been wrong before..

 

[Mr Tiler]

I was going to comment that its not needed to on the basis that cement board doesn't expand/contract as much as the chipboard would but im guessing that is wrong lol