The Brew Cabin

Hi - Thank you for one of the best websites.
I plan to lay bluestone crazy paving on a pre - laid reinforced concrete bed. I have both a patio and carport to cover. The stone is of variable thickness but is thicker overall for the carport.
1. I have gathered from the forum that a 10:1 cementitious bed of 30-50 mm is ok for the patio - can you confirm this?
2. Should the same apply for the carport?
3. The dry sand jointing approach has a LOT of appeal effort-wise but will it stand up as well as mortar, and won't it be susceptible to weeds and moss etc? Any other suggestions?

10:1 bedding for the patio area is fine. You can also use this for the car-port area, or you can beef it up a bit to 8:1. Use a semi-dry mix - it's much easier to work with.

I can't recommend dry-sand jointing. That would be flexible jointing on a stiff construction, which just doesn't work. You need proper mortar jointing. This is especially so with 'crazy' paving, as the joint width is so variable and sand joints are only suitable up to 5mm width.

If you really want to avoid mortar jointing, a polymeric sand might be suitable, but it can work out to be quite expensive if you have a lot of paving to joint.

Thanks for the info. Nothing for it but to go and buy some kneepads!