Hi,
I hope someone can offer some advice.
I am having a patio done with Rutland Oakham paving kit which has 600x600 and 600x300 slabs.
The guy has used sand & screed and cement in a dry mix which has semi hardened but its not solid hard.
Now some of the slabs do move slightly and he has gone around and fixed with basically adding more of the mixture underneath and as I find more his fixing them.
My issue is with pointing now. I tested a few slabs with various building sand and cement ratio of 3:1 and sharp sand and cement with a ratio of 2:1 but both of these pointing has crumbled after couple of days.
I am thinking its because the slabs are not stuck to the base that they have a slight give and hence the pointing is not sticking. He wanted to use a wet mix for the pointing which I refused due to possible staining on the slabs etc hence my own tests.
So what are my options? Do I need a solid pointing or can I use a flexible pointing mix...the gaps range from approximately 5-10/12 mm. Or should I get the guy to re-do this with a full bed of mortar?
Thanks
I hope someone can offer some advice.
I am having a patio done with Rutland Oakham paving kit which has 600x600 and 600x300 slabs.
The guy has used sand & screed and cement in a dry mix which has semi hardened but its not solid hard.
Now some of the slabs do move slightly and he has gone around and fixed with basically adding more of the mixture underneath and as I find more his fixing them.
My issue is with pointing now. I tested a few slabs with various building sand and cement ratio of 3:1 and sharp sand and cement with a ratio of 2:1 but both of these pointing has crumbled after couple of days.
I am thinking its because the slabs are not stuck to the base that they have a slight give and hence the pointing is not sticking. He wanted to use a wet mix for the pointing which I refused due to possible staining on the slabs etc hence my own tests.
So what are my options? Do I need a solid pointing or can I use a flexible pointing mix...the gaps range from approximately 5-10/12 mm. Or should I get the guy to re-do this with a full bed of mortar?
Thanks