[Jettaway]

Hi everyone,

Im new to the forum but hope to be of help other people.

I have been pressure washing for a couple of years now and have tought myself all the way, i had no idea this forum exsisted until recently.  I have been reading back over previous threads and found them a lot of use.  Its great to see how people work differently, so i just wanted to ask a few questions (that i couldnt find answers to) just to help me with my business.

When do you guys use weedkiller, at the minute i apply it a few weeks in advance to get into the roots, then clean and resand (block Paving) I read some one used a 'granular' weed killer after cleaning.  I assume this is sodium chlorate, but i thought that weeds needed to ingest the killer for it to work.

Also, on mossy block paving jobs, after i have cleaned i apply an anti fungacidal wash, does this actually make a difference?

Finally, on the subject of sodium hypochlorate, i have used this a couple of times with great results. im not sure about black spores, i have had mixed results when dealing with them on concrete or flags. Sometimes they go, sometimes not, do they tend to disappear after several days.  One bad thing for me with hypo is that i get really paranoid that i havent rinsed off properly, usually end up rinsing an area 3-4 times to be sure and also about it burning plants in flower beds or grass lawns.

Thanks for any help and input,

I hope to help others in the same way when and where i can

[chris scott]

I would us Glysophate a week before to kill anything living growth..needs leaf structure to work. After washing and sanding i would
use chikara to prevent/slow down regrowth.
Just be careful as you now not allowed to blanket spray areas,only spot spray the weed itself!!! and Chikara is not licencsed for use on block type surfaces due to run off. Both are safe if used properly and very efficient.
Sodium chlorate is off the market now and would not work in that application.
Quats is safer to use... albeit slower but more efficient  than bleach. It can be added to you pressure washer reservoir and applied like this. It will not do any damage the pump although i would run clean water through it after.  

[Great Outdoors]

Just be careful as you now not allowed to blanket spray areas,only spot spray the weed itself!!! and Chikara is not licencsed for use on block type surfaces due to run off. Both are safe if used properly and very efficient.

Hi Chris thks for that number good contact.

Is this a new directive in ref to blanket spraying  Chikara - Top dollar, great product not bad for someone who earns a few hundred quid a week 

[chris scott]

Just be careful as you now not allowed to blanket spray areas,only spot spray the weed itself!!! and Chikara is not licencsed for use on block type surfaces due to run off. Both are safe if used properly and very efficient.

Is this a new directive in ref to blanket spraying  

Yep spot spraying of weeds only!! Would not worry about it tho' .I have another weed killer mix for (we call it)horse/ mares tail if you struggle with that.

[Jettaway]

Thanks for the info Chris,

So, just out of interest, with hypo, what would happen if it isnt fully washed away, would it mark the slabs? Im pricing up for a patio with a raised brick border (will help protect the grass) and the patio has no natural run off, so im a little concerned that there may be traces of hypo left on the surface. I think im swaying towards not using hypo on this one.

What is this Quats stuff? Ive had a quick google but cant find anything.

[chris scott]

Try Quaternary ammonium.

[Gray1]

Mares Tail.  It has an almost impervious skin that needs bruising before aplying weed killer, and the roots go realy realy deep.

Gray1

[BDCS]

I have 3 different weedkillers - one of which does kill the mares tail but the impervious skin is in fact a waxy coating, add washing up liquid into the weedkiller. This helps break the wax and allows the plant to soak in the weed killer

[chris scott]

Woody mixed with Glysophate. No need to bruise the plant. It is difficult as it has no real leaf structure and a impervious coat. Woody as the name implies is often used in porn film to describe ...oops sorry wrong forum!
Woody the weedkiller is design to penetrate through bark and does not really need leaf structure to get into the plant 

[Great Outdoors]

Just be careful as you now not allowed to blanket spray areas,only spot spray the weed itself!!! and Chikara is not licencsed for use on block type surfaces due to run off. Both are safe if used properly and very efficient.

Is this a new directive in ref to blanket spraying  

Yep spot spraying of weeds only!! Would not worry about it tho' .I have another weed killer mix for (we call it)horse/ mares tail if you struggle with that.

Chris where did you get this from ie 'not allowed to blanket spray' 

[chris scott]

I will find the actual article that says " only spray weeds". I can't remember who told me or where i read it...old age!
It all seemed a bit impractical when i read it and thought there is no way it could be inforced.
Try this for a start...
http://www.monsanto-ag.co.uk/publications/TB_Roundup_Hard_surfaces_new_regulations_2012.pdf

[Great Outdoors]

I will find the actual article that says " only spray weeds". I can't remember who told me or where i read it...old age!
It all seemed a bit impractical when i read it and thought there is no way it could be inforced.
Try this for a start...
http://www.monsanto-ag.co.uk/publications/TB_Roundup_Hard_surfaces_new_regulations_2012.pdf

ok tar