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Would you scrape the worst off then weed kill with resolva then pressure wash then fill with sand?
How much? It's quite small. Approx 3.5 metres wide by 15 metres long
Would off the shelf - resolva weed killer do it? I only have a cheap electric pressure washer for such a small job would I be better to hire one for £75?
There is is no point putting weed killer on it if you want to wash it the same day , a karcher isn’t going to look at that you need a decent pressure washer for that at least 15 ltr per muinit and 3000 psi ,if hireing one see if you can get a flat surface cleaner as well as a turbo nozzle it will be quicker , I think you will also need to hypo it as I expect it’s covered in black /silver licken hypo will kill that off pretty quick , but a pressurewasher on its own might leave marks .
Don't cut down any weeds because the weedkiller gets absorbed through the leaves so the more the better. Good idea hiring a PW which will give you experience of what one to buy in future.
Great advice.Dont use a domestic machine, people trotting them out gives us all a bad name and puts passers by/relatives off using a pressure washing service in future due to the limited results and time taken on the job (this would take days with a small machine). I'm not being harsh for the sake of it but your going to need something with a bit of grunt (at least 15lpm as stated by the other poster) to make a dent on that lot, ive had dozens of jobs like this that end up taking a reasonable amount of time with an actual machine let alone with a domestic electric pressure washer. Either hire a decent machine and bear the cost while using it as a profitless but educational process or leave it to someone who can make a professional job of it. My approach would be to weedkill with any easily available glyphosate based killer and leave for at least a week, then return to clean it with the FSC and turbo with re-sanding to follow the next dry day, also with the fact I tend not to use hypo as I dont like the potential hazards (not judging anyone who uses it as its a personal choice and the results are often indeed great) I would opt for a biocide treatment post cleaning to kill and prevent recurrance of algae and lichen as those bricks look black, little chance of getting them totally clean with a powerful petrol set up alone and zero chance of getting them in any way acceptable with a domestic appliance.
If by some chance you get it looking reasonable by one method or another then do yourself a favour and offer no assurances against weeds coming back, as in cases like this one they certainly will, and quickly as the roots will be well under the stones and youve no hope of killing the whole lot (not to mention the fresh ones that will be seeded in on the wind almost as soon as the sands been brushed in). leave them with an aftercare sheet advising regular weedkiller application throughout the season and any info on preventing algae/lichen infestation in the future, covers your back and will stop calls 3 months later complaining its a forest again. just my thoughts and a bit of advice. take it or leave it bud
Hypo is needed for instant results the customer wants a dirty house this morning and a clean one this afternoon bio won’t give you that , hypo is perfectly safe IF you know what you are doing , in 10 years using it we have never killed any customers plants or grass ,there are a lot of scarmongerous out there claiming that it’s dangerous , and used wrongly it can be , but used safely and with training it’s perfectly safe , as an example what are you swimming in in a swimming pool ?? What is your pre packed salad washed with in a supermarket ? What is put in drinking water ??. Hypo but in the correct strength , it’s exactly the same using it for softwashing , I have a very large koi pond in my garden with fish over 30 inches long and I hypo the edges of the pond every year and have never had a problem as I know how to use it , but in the wrong hands you could easily kill the fish they are very sensitive to hypo . Bio products also have there place they are very good to use after softwashing with hypo as a preventative to slow down re growth of algy etc , I have done a lot of experiments over the years with bio products and they do a reasonable job but can take up to 6 months or more to give the desired results and customers won’t pay and accept that in my experience. Best thing to do is try it on your own house do halfwith a hypo mix and half with bio and leave it and see for yourself the results you get that’s what I did , it’s all down to experience using different products , you will over time learn what’s best for different situations
I wasn’t criticising what you said you are right to be cautious , I was just trying to show that hypo used correctly is a very safe product, a lot of people demonise it ,it is a very cheap and good agent for steralizing and sanatising surfaces , along with bio products ( we use algo clear pro ) to slow down re growth it will give instant results which customers want , they don’t want to have to Wait several months to get a clean property , I found bio on it’s own did work on a number of things but it was blotchey for months as some things it killed quickly and some much slower causing a mottled affect on the surface , where as using hypo within 45 muinits the whole surface looked the same , sorry if it appeared I was finding fault with what you said I didn’t mean to do that just trying to show with a bit of knowledge it’s a very good cleaning agentThis is exactly what im talking about, its an excellent chemical but I just dont use it personally. dont write it off on my say so. Take Pjj's advice and get educated on it (training, personal use etc) ive never said to swear off it but i do advise to exercise caution. my opinion is why take a risk when it can be avoided and have the same result achieved. think youve opended up a rift in the hypo/non hypo community here triangle ?
Dont use a domestic machine, people trotting them out gives us all a bad name and puts passers by/relatives off using a pressure washing service in future due to the limited results and time taken on the job (this would take days with a small machine). I'm not being harsh for the sake of it but your going to need something with a bit of grunt (at least 15lpm as stated by the other poster) to make a dent on that lot, ive had dozens of jobs like this that end up taking a reasonable amount of time with an actual machine let alone with a domestic electric pressure washer. Either hire a decent machine and bear the cost while using it as a profitless but educational process or leave it to someone who can make a professional job of it. My approach would be to weedkill with any easily available glyphosate based killer and leave for at least a week, then return to clean it with the FSC and turbo with re-sanding to follow the next dry day, also with the fact I tend not to use hypo as I dont like the potential hazards (not judging anyone who uses it as its a personal choice and the results are often indeed great) I would opt for a biocide treatment post cleaning to kill and prevent recurrance of algae and lichen as those bricks look black, little chance of getting them totally clean with a powerful petrol set up alone and zero chance of getting them in any way acceptable with a domestic appliance.
If by some chance you get it looking reasonable by one method or another then do yourself a favour and offer no assurances against weeds coming back, as in cases like this one they certainly will, and quickly as the roots will be well under the stones and youve no hope of killing the whole lot (not to mention the fresh ones that will be seeded in on the wind almost as soon as the sands been brushed in). leave them with an aftercare sheet advising regular weedkiller application throughout the season and any info on preventing algae/lichen infestation in the future, covers your back and will stop calls 3 months later complaining its a forest again. just my thoughts and a bit of advice. take it or leave it bud