Grout Admix Gt1

[Wishiwasatoptiler]

Hi
While in a local tile supplier getting prices for a job, they advised grout admix gt1, the background was 12mm hardibacker, adhesive to used be was flexi adhesive and porcelain tiles, they said it would aid flex properties in the grout in case of movement of boards.
Is it really needed are is it just an extra cost.
Cheers
D

 

[On one]

Depends......
Is the substrate that bad you need to add gti to the grout,if it is you need to get that sorted first.
Can you not just use flexible grout? you normally cant add admix to an already flexible grout.
Adding admix will make it harder to clean up the grout haze.

 

[kevsalt]

i only use it on upstairs bathroom floors even when theyve been lined with nmp board ...does make the grout very flexible ..make sure you wash of well though residue can be hard work to remove

 

[Dave]

Use another brand of grout 🙂 , plenty out there that don't need GT1 admixture to create a grout for timber floors , admixtures have there uses but grouts these days have high polymer contents as it is.

 

[Andy Allen]

Last time I spoke to bal they only recommend gt1 admixture to there standered grout for a timber substrate ......dose not say much for there flexible grout Imo.... or maybe there trying to screw you for more money........anyway you wouldn't want to loose you3r 25 year guarantee would you...😉

 

[Wishiwasatoptiler]

It was flexible mapei grout. That's why I thought adding the admix wouldn't be needed.

Thanks for the info

 

[Dave]

It was flexible mapei grout. That's why I thought adding the admix wouldn't be needed.

Thanks for the info

Why would a retailer sell GT 1 for mapei ?

Wonders never cease. Lol.

 

[Wishiwasatoptiler]

Ya, they even rang there tiler who was on a job to confirm. I was stood in their office while they spoke. Maybe a way to add on sales.

 

[Andy Allen]

Jeeez thought you were using bal grout......wouldn't mix it with mapei. .

 

[Wishiwasatoptiler]

Ya, think I'll give that supplier a miss next time.
Thanks for the info, much appreciated.