The Brew Cabin

Posted: **Fri Dec 12, 2008 12:34 am**

Am going to be laying 400m2 crazy paving in Caithness Flagstone.
Flagstone will be random sizes and all ground works and drainage will be done before by seperate squad to correct standard. Question is the flagstone will be 50mm thick due to light traffic use (customer has two cars that will be parked in court yard) just want to confirm if I should be laying onto a 3-1 semi dry mix at 50mm thick or should it be a different mix ie wetter and 4-1.

Any advice would be welcome will be using Probst slab lifter and have Partner saw and other bits n pieces

am thinking of using skidsteer for moving sand and moving pallets of flagstone. Have used Caithness Flagstone a number of times and is nice to work with so not to worried about the stone just the mix.

Cheers

Posted: **Fri Dec 12, 2008 12:41 am**

if they are putting cars on them i would say 100mm dry lean concrete on 100 mm subbase

LLL

Posted: **Fri Dec 12, 2008 10:07 am**

Yeah: I'm with LLL. Either bed directly onto 100mm of C20 or better concrete or use a 3 or 4 to 1 mortar to bed them over a pre-placed concrete base.

Caithness Slate isn't particularly porous, so there's a temptation to use a moist, rather than wet mix, and I know that priming the underside is usually recommended.

Posted: **Sat Dec 13, 2008 3:56 pm**

Cheers for the advice the substrate will be 250mm as it is soft area the guys doing it are pros as they are putting in the drainage.

Cheers

The Brew Cabin

Caithness flagstone - Crazy paving