Sand in wide flag jointing?

[Halitosis]

Hi all,
I've laid a patio of flags (Tobermore Historic) on a dry sand/cement base, leaving 10mm jointing gaps. Am I OK to simply use kiln-dried sand on the joints, or is that only appropriate if setting the flags close-jointed? The patio is framed within a perimeter of walls. Any suggestions for the best jointing finish considering this base?
Thanks for any advice

 

[r896neo]

Have you laid them tight and the spacers on the side of the flags are giving you the 10mm joint or have you also left a joint between the spacers? If you have laid them with the spacers touching then pointing them with mortar will be hellishly difficult. if you have laid a joint you may have a chance.

Really because of the wavy sides a slurry is the best thing to point these flags with as trying to firm in mortar is really hard.

So do you have them laid tight or spaced?

 

[Halitosis]

So do you have them laid tight or spaced?

Hi r896neo - they are tight in that the protruding parts are together. So it appears mortar is out - would sand or slurry be best?

 

[r896neo]

Yea they are a stupid design really. when i lay them i leave the joints a little bigger so i can slurry point them.

Even laid as you have them you would need a very wet slurry product to get it into the small gaps.

You may be best going for dry sand and just live with the increased maintenance.

If you do go for a slurry something like rompox D1 or gtfk

 

[Halitosis]

Sand it is then. I see from pavingexpert.com there are 'joint stabilising compounds' that can firm the sand up - do you think they are worth it? Something like this: http://www.amazon.co.uk/gp/product/...liid=I2HMITYDS0SI3P&ref_=wl_it_dp_o_pC_nS_ttl
Thanks again R896neo!

 

[mcluma]

I would go with "super" dry sand

 

[r896neo]

personally i have never used them but they may help a bit.