Best sand for between cobble?

Bleating Lamb

Have the 'old style' cobble down around 5 years around my house.....between wind,heavy rain etc a lot of the original sand has gone from between the cobble which is allowing small weeds to grow in its place.I have a couple of questions.
1- Is there a specific 'type of sand' best suited to buying and spreading out and sweeping back in between the cobble?....or will ordinary builders sand do?

2-have painstakingly removed all the weeds using a screwdriver over several evenings....should I spray the area first before replacing the cobble to retard any possible regrowth?....or should I put in sand first and then spray?

3-anyone recommend a spray that won't discolour the cobble and kills the weeds well.

Many thanks for any answers.

Luckysasha

It's known as silica sand or kiln dried sand. I use round up on my pavers spray first , leave it a day or two to dry fully then spread sand

Bleating Lamb

Luckysasha wrote: »

It's known as silica sand or kiln dried sand. I use round up on my pavers spray first , leave it a day or two to dry fully then spread sand

Thanks...where would you get that sand?...have a fairly big area to do...is it expensive?....would need the equivalent of around 5 or 6 barrowfuls of sand I would imagine.

Contributor 2013

mix sand and concrete. youtube/google will answer for the ratio's.

secman

Roadstone paving centres usually stock it, comes in pre packed bags.

Bleating Lamb

secman wrote: »

Roadstone paving centres usually stock it, comes in pre packed bags.

Thanks...roughly how much per bag?

rilly99

Bleating Lamb wrote: »

Thanks...where would you get that sand?...have a fairly big area to do...is it expensive?....would need the equivalent of around 5 or 6 barrowfuls of sand I would imagine.

5 or 6 bags seems a lot a driveway 20x 20 feet takes I reckon half to three quarter of a bag

Luckysasha

Your only topping up what sand is missing so it won't take a lot. I resanded an area of 30ft X 15ft with two bags and that was after power washing. Only thing is the sand will keep even if the bag is open

Bleating Lamb

Thanks for all replies....roughly how much a bag is the sand?

wait4me

You can get it in B&Q as well - its about 6 or 7 euro a bag. And as said above, two bags will probably do it.

size5

I now have to do the same between my pavement slabs: Two questions

1: There is a moss growing between some of the slabs. When I power wash to clean the slabs will this get rid of it OR doI need to get some sort of moss killer?

2:

Bleating Lamb wrote: »

Thanks...where would you get that sand?...have a fairly big area to do...is it expensive?....would need the equivalent of around 5 or 6 barrowfuls of sand I would imagine.

When this is spread does it set? Or is it when it rains Or am I thinking of something completely different?

Luckysasha

No it won't set when it rains if it's just silica sand you use. It will go hard if you apply a sealer to your pavers. This helps the next time you power wash it won't blow as much sand out. There is a product you can get for grouting between paving slabs called fuge. It will set like cement one it's wet but it's only for grouting large gaps. It wouldn't be recommended for brick pavers

rje66

Contributor 2013 wrote: »

mix sand and concrete. youtube/google will answer for the ratio's.

This is bad advice, do not do this.

Contributor 2013

rje66 wrote: »

This is bad advice, do not do this.

hmm. Why?

rje66

Contributor 2013 wrote: »

hmm. Why?

Cement will stain paving.