The Brew Cabin

Posted: **Mon Oct 19, 2020 3:46 pm**

Hi All,

Hoping for some expert opinions if you would be so kind...

Recently had a porcelain patio installed by an experienced builder but the slabs do not appear to have bonded to the sand cement bed. I believe PVA was applied to the mix and also applied to the rear of the slabs, but after doing some reading on here I am now fairly confident this process is not how it is done.

Basically, other than the presence of some suction, I can freely lift the slabs from the bed. That said, they are very level and appear solid.

Am I likely to run into problems moving forward? If so, to what extent?

Any opinions much appreciated.

Cheers.

Posted: **Mon Oct 19, 2020 6:27 pm**

Oh dear.
An experienced builder? Perhaps stick to building and leave stabbing to the experts.
Yes, it's wrong. Its should have had a bond bridge such as sbr and cement, or something like Larson.
Pva will do nothing other than waste time and money.
Its will need to be relaid!

Posted: **Tue Oct 20, 2020 9:36 am**

Yup - another eejit who has sort of heard something about sticking down porcelain for patios, but doesn't really know much more than that and opts for water-soluble PVA.....in ground conditions that are damp for 9 months of the year.

It will all need to be lifted and re-laid. By a professional paving installer.....and hopefully at the expense of this so-called "experienced builder".

Posted: **Tue Oct 20, 2020 7:18 pm**

PVA has no place is paving at all, the only bonding agent is SBR in a cement slurry on back of slab

The Brew Cabin

Porcelain slab install fail