Porcelain tiles not sticking to plywood?

[Bill]

Hi

I'm looking for some advice from the experts, as a DIY tiler who's done a few jobs. I've just laid 600x600mm polished porcelain tiles in my hallway. Floor is T&G chipboard and I've over boarded with 15mm exterior plywood, screw-fixed at 300mm centres and fixed tiles using BAL single part flexible adhesive. I sealed back and sides of plywood with BAL SBR bond (as recommended on BAL website). I was running low on adhesive towards the end if the job and added some more adhesive and water to the existing mixed adhesive I had left in the bucket (been in bucket for maybe 3 hours) and the tiles I've fixed using this adhesive are not sticking to the plywood.......is there a problem adding more powder adhesive and water to adhesive which has been mixed for 3 hours or so?

i'm worried that the other tiles that I've laid may not be properly stuck to the plywood? I've been careful not to walk in the tiles for 24 hours......is this long enough to leave them before I walk on them and grout them?

Anyone had problems fixing porcelain floor tiles to plywood using BAL single part flexible?

 

[Stef]

It states you shouldn't add more water to a mix but I've spun my adhesive up & added a bit of water & never had a problem.
Bal spf is a very good adhesive, check the date on the bag incase it's out of date.
Longforgan, take it your just outside Dundee?
Had a few meals in the longforgan inn back in the day..

 

[Time's Ran Out]

Dyslexia set in - I thought it was 'longforgottontiler'.
I've never remixed old adhesive, always use a measuring guide for water volume and have a clean bucket available for each and every mix.:lol:
Still surprises me that people continue to tile direct to a plywood substrate!

 

[Stef]

Dyslexia set in - I thought it was 'longforgottontiler'.
I've never remixed old adhesive, always use a measuring guide for water volume and have a clean bucket available for each and every mix.:lol:
Still surprises me that people continue to tile direct to a plywood substrate!

Well I'm assuming that it's longforgan!!!
Could well be long forgotten!!

 

[Old Mod]

It states you shouldn't add more water to a mix but I've spun my adhesive up & added a bit of water & never had a problem.
Bal spf is a very good adhesive, check the date on the bag incase it's out of date.
Longforgan, take it your just outside Dundee?
Had a few meals in the longforgan inn back in the day..

yeah but u don't do a mix on top do u Stef! U just don't do it, loosening up is one thing, a new mix is completely different. It's the same if u mix a new rapid mix on top of an empty bucket that u've not washed out first surely? Sets it off in no time cos the remains of the original mix activates the new one.

 

[Stef]

yeah but u don't do a mix on top do u Stef! U just don't do it, loosening up is one thing, a new mix is completely different. It's the same if u mix a new rapid mix on top of an empty bucket that u've not washed out first surely? Sets it off in no time cos the remains of the original mix activates the new one.

I've just read that again & saw he's mixed within a mix, no I use one mix & then make a fresh batch.
I don't clean out my bucket between mixes, the bucket gets scraped with my trowel & a scraper so there's very little left if any in the bucket.
The bucket might get washed at the end of the day or get knocked out the next morning!!

 

[Old Mod]

I've just read that again & saw he's mixed within a mix, no I use one mix & then make a fresh batch.
I don't clean out my bucket between mixes, the bucket gets scraped with my trowel & a scraper so there's very little left if any in the bucket.
The bucket might get washed at the end of the day or get knocked out the next morning!!

:rofl: sorry forgot u don't have time! Hehe

 

[Stef]

:rofl: sorry forgot u don't have time! Hehe

Time is money as they say!!!

I work clean & tidy but not that tidy that I clean my bucket out between mixes!!!

 

[Old Mod]

Time is money as they say!!!

I work clean & tidy but not that tidy that I clean my bucket out between mixes!!!

Just teasing Stef, u know that!

 

[Dougs Third Go]

never top an adhesive with powder or water after initial mix, significantly reduces the bond. I'm sure your tiles that were fixed prior will be fine.