Laying Indian Sandstone on existing hard concrete base?

[Marc1t]

Hi,
So as the title of this thread,. I want to lay Indian sandstone onto an existing hard concrete base which is level & allready slopes away from the house to the recommended fall away etc. My question is… What is the best way to do this? It has been suggested that the easiest way is to level a dry mix of sand/ sement sort of screeded between two battons about 25mm deep & laying directly onto this. But will the mortar set properly With just residual moisture etc. My prime concern is that the slabs obviously need to stay permintently fixed with general foot traffic etc. Or would you suggest wetting prior to laying with water spray, or even a wet mix? I intend to use a priming slurry on the back of the slabs aswel.
Never done this before so any advice appreciate.
Thanks, Marc.

 

[HERTS P&D]

All the info you need is here:

Laying Stone Flags

Best practice installation guidance for laying natural stone paving, particularly stone flags

www.pavingexpert.com

Andy

 

[foxhole]

Hi,
So as the title of this thread,. I want to lay Indian sandstone onto an existing hard concrete base which is level & allready slopes away from the house to the recommended fall away etc. My question is… What is the best way to do this? It has been suggested that the easiest way is to level a dry mix of sand/ sement sort of screeded between two battons about 25mm deep & laying directly onto this. But will the mortar set properly With just residual moisture etc. My prime concern is that the slabs obviously need to stay permintently fixed with general foot traffic etc. Or would you suggest wetting prior to laying with water spray, or even a wet mix? I intend to use a priming slurry on the back of the slabs aswel.
Never done this before so any advice appreciate.
Thanks, Marc.

Laid mine on 100mm of wet mortar, if they are mixed sizes you need a drawing of the area with pattern to follow . (Avoid long continues joints or 4 joints meeting if using mixed sizes .)

 

[blup]

The skillbuilder channel on youtube has just posted a video on this, worth a look

Blup