Block paving

[fixitflav]

Anybody know the best way to fill the gaps between the blocks on a fairly permanent basis, to stop weeds sprouting?

I’ve heard talk about brushing on kiln-dried sand, but I can’t see that being as permanent as I’d like.
I'm thinking of adding some cement to the sand, but concerned some will be left on the surface and discolour the blocks.

 

[Old Salt]

Use weed killer to kill the weeds then after a couple of weeks jet wash then once dry add kiln dried sand. It’s the standard way to keep the blocks in place. I use a wire brush with a long handle to stay on top of the weeds throughout the year. Doesn't take long and gives you a break from her indoors.

 

[Ivor Windybottom]

You shouldn't use anything that solidifies, as block paving will move slightly. You need to let it flex. You'd just end up with broken bits of cement that look a right mess and you can't fill between.

The advice above is spot-on.

 

[fixitflav]

Thanks gents

 

[noseall]

Anybody know the best way to fill the gaps between the blocks on a fairly permanent basis, to stop weeds sprouting?

As far as weeds (seeds) are concerned, block paving is like a garden of eden. Un-trafficked areas will love and nurture those seeds. Short of sterilising the vulnerable areas, hard work is the only answer.

 

[kingandy2nd]

I used this stuff on my paving;

https://www.wickes.co.uk/Dansand-NO-GROW-Block-Paving-Jointing-Grout---20kg/

All that’s grown is a slight covering or moss in the past couple of years the drive has been down.

 

[fixitflav]

I used this stuff on my paving;

https://www.wickes.co.uk/Dansand-NO-GROW-Block-Paving-Jointing-Grout---20kg/

All that’s grown is a slight covering or moss in the past couple of years the drive has been down.

The link didn't work for me, but I found it on Wickes site, Dansand NO GROW Block Paving Sand. Sounds worth a try, thanks.

 

[fixitflav]

You shouldn't use anything that solidifies, as block paving will move slightly. You need to let it flex. You'd just end up with broken bits of cement that look a right mess and you can't fill between.

The advice above is spot-on.

Take your point, but I was thinking of a weak mix, about 1:10

 

[fixitflav]

As far as weeds (seeds) are concerned, block paving is like a garden of eden. Un-trafficked areas will love and nurture those seeds. Short of sterilising the vulnerable areas, hard work is the only answer.

Interesting thing is, block paving in town pedestrianised areas doesn't seem to get much moss and weed, even out of the way corners which don't get much foot traffic, and I've never seen workmen attending to it.

 

[fixitflav]

Also thinking of using a spray-on coating, to protect the surface and bind the sand infill. There's several on the market, anybody had experience and can recommend?

 

[noseall]

Interesting thing is, block paving in town pedestrianised areas doesn't seem to get much moss and weed, even out of the way corners which don't get much foot traffic, and I've never seen workmen attending to it.

There's a bridge near me that has a broad swathe of paving on it. I swear they needed a combine harvester after about 10 years of neglect.

 

[Ivor Windybottom]

Anywhere without weeds is probably quietly doused in deadly chemicals a couple of times a year.

Dansand's website doesn't state what they add, but they do state that this mystery additive lasts for 18 months. I would be concerned about plants growing next to any paving, especially veggies.

They also make various sands with binding agents, which are probably a good idea - something a bit gummy rather than the hard bond you get with cement. Also without the staining you would definitely get with cement.