Apply weed killer to monobloc drive after power washing

[spiidey]

have just finished a good 9-10 hour stint power washing our front mono bloc drive.

I need to apply weed killer into the gaps between the blocs before re sanding with kiln dried sand.

What type of weed killer should be used?

 

[foxhole]

Most weed killers don't last more than a few months, better to mix in a quantity of salt which will discourage growth and be a lot cheaper.

 

[spiidey]

Most weed killers don't last more than a few months, better to mix in a quantity of salt which will discourage growth and be a lot cheaper.

How much salt per square metre would you recommend? What type of salt?

 

[jj4091]

Depending how large your drive is just get large bags of cooking salt from your local supermarket pour a bag on the drive & then brush it around & into the joints as you would the sand. Keep an eye on it until it has all dissolved with the rain & then apply your sand. Don't be in a hurry & use a hose pipe it will not work as well. As with most weedkillers it will not work on weeds like dandelions & dockings, you would need to physically remove their roots.

 

[foxhole]

large bag of salt for water softener is probably cheapest option.

 

[DaveHerns]

Someone today was saying vinegar is an effective weedkiller.

 

[HERTS P&D]

Salt is a lot better than vinegar, also it is easy to apply as all you have to do is pour and brush.

Andy

 

[JohnD]

you can use Pathclear, which contains a chemical that prevents seeds growing. It leaves a thin film on the surface layer of the soil, which will break up if you disturb it by hoeing, raking or pulling up weeds.

It contains a different chemical that kills active growing weeds, it is absorbed through their leaves.

You don't apply any normal weedkiller before filling the cracks with sand.

 

[foxhole]

you can use Pathclear, which contains a chemical that prevents seeds growing. It leaves a thin film on the surface layer of the soil, which will break up if you disturb it by hoeing, raking or pulling up weeds.

It contains a different chemical that kills active growing weeds, it is absorbed through their leaves.

You don't apply any normal weedkiller before filling the cracks with sand.

Its on paving , no soil involved.

 

[JohnD]

So it leaves a thin film on the surface layer of the sand. it prevents seeds growing.

 

[Bilabong007]

Anyone tried the Tarmac kd sand that contains weed killer? I seen it last time I was in b n q

 

[john4703]

Anyone tried the Tarmac kd sand that contains weed killer? I seen it last time I was in b n q

I used some sand from B&Q that is supposed to stop weeds. I can't remember the exact make. I've got plenty of weeds growing in it.

 

[cwhaley]

I used a bottle of Rostate 360 Glyphosate Super Strength before we live where we do now. We had a large gravel driveway which by March/April was sprouting weeds everywhere fast. Mixed a solution of this stuff and spread it on and everything was dead in 3-5 days. In all the time I was there, nothing ever grew back on the area I spread it on. At all. Not even an inkling of a weed.

Beware that it is potent stuff and will kill most plants/weeds/shrubs it comes into contact with.

https://www.ebay.co.uk/i/2528200617...=9046400&device=c&campaignid=861899495&crdt=0

 

[rob_j20]

Glyphosate isnt the right stuff for this it will be all but gone in under a week. It soon breaks down. Its why its so popular.
Salt is an excellent idea.
For more stubborn weeds bleach works well i use Caustic Soda on Horsetail dead in a few days.

 

[cwhaley]

If you buy it in strong concentrations and mix to the right ratio, it is potent stuff. In fact, I only used it because the farmer on the fields behind where we used to live bought two drums of the stuff and had incredibly effective results.

Bleach too breaks down very quickly into salt and water.