Granite Cobbles

funkey_monkey

Are these always in a minimum width of 100mm?

I've got pillars on drive that are 490mm wide. I'm putting in a channel drain - so that will be 100mm.

I would not have enough space to put in 2 routes of cobbles on either side of the drain - if they only come in 100mm width.

Can they be got narrower - I don't want to put in a special order though?

Thanks.

sydthebeat

Why are you restricting yourself to the 490mm?

Just work from the centre of the pillars outwards, and wherever you end up, you end up.

rje66

As Syd says,

Or, use the non sawn ones and have wider joints for grout. Non sawn ones are not all same sizes, so wider grout allows for that. Three rows of cobbles plus the drain???? Or these???

Screenshot_20250427_123657_Chrome.jpg

funkey_monkey

I'll have another think about it. I had thought it would be better if it didn't go beyond the width of the pillar.

Slot drain would not be sufficient for the volume of water plus it has to handle lorries.

standardg60

Are you stopping water from flowing in from outside? Why wouldn't you put the channel drain in first and then 3 rows of cobble, with roughly 20mm gaps that would bring you in line with the pillar?

A pic would be great here.

Ian OB

A 10mm overhang won't be the end of the world. A few well placed bedding plants/weeds & nobody will ever notice.

funkey_monkey

https://www.boards.ie/discussion/comment/123393889#Comment_123393889

Preventing water going out onto a shared access; one would have a significant flow. There are 2 driveways in a birdsmouth layout, so 3 pillars.

I was going to use the cobbles and/or the channel to show the delineation between the shared area and separate areas.

standardg60

https://www.boards.ie/discussion/comment/123393986#Comment_123393986

Ok, putting a channel drain between the pillars would require some form of pipework underneath to funnel the water away. Have you a drain or ditch either side of a pillar? Might be easier to run the channel drain inside the line of the pillars and you can continue it on then, and just cobble between the pillars.

funkey_monkey

https://www.boards.ie/discussion/comment/123394076#Comment_123394076

Drainage pipes are in place ready for the channel - just gave to link the channel s into them. It was always the plan to put in the channel, just wondering about cobbles from aesthetics pov.

standardg60

https://www.boards.ie/discussion/comment/123394426#Comment_123394426

VG. To go back to your original question it would be 3 rows plus channel, not 4 to allow for grouting, so whichever way you wanted to work it then.