Deck over slabs...

CaptainRAVE said:
I use this instead of pressure washing. Much quicker, over a year and the slabs are still clean:

Sodium Hypochlorite 15% HIGH Strength Patio Block Paving Driveway Cleaner Washer | Algae Weed Moss Mould Blackspot & Lichen Killer Remover | Chlorine Shock Treatment of Pools & Spas https://www.amazon.co.uk/dp/B087X9D1HF/ref=cm_sw_r_cp_api_i_5QJEDAZRW1RXKQG6KZFK
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This is my job for tomorrow, any hints and tips? I have the sodium hypochlorite and jet washer at the ready! I was going to mix the SH one part to 3 parts water, maybe a bit stronger for the dark spots or stubborn stains.
 
Also got decking with a good section of it being built on top of an old patio. No issues with rats/mice at all, I just made sure the whole underneath was covered in weed sheets, if nothing can grow then there's nothing to attach any wildlife.
 
Mysterae_ said:
This is my job for tomorrow, any hints and tips? I have the sodium hypochlorite and jet washer at the ready! I was going to mix the SH one part to 3 parts water, maybe a bit stronger for the dark spots or stubborn stains.
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OK - I'm going to try this first. The drive needs a clean so will do that as well. So as Mysterae asks... any hints or tips?
 
Mysterae_ said:
This is my job for tomorrow, any hints and tips? I have the sodium hypochlorite and jet washer at the ready! I was going to mix the SH one part to 3 parts water, maybe a bit stronger for the dark spots or stubborn stains.
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firstborn said:
OK - I'm going to try this first. The drive needs a clean so will do that as well. So as Mysterae asks... any hints or tips?
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I used a 5L sprayer. Dilution was roughly 1:4. Sprayed it on, left it (should have worn a mask, did wear safety specs and old clothes that could bleach easily). Watched it work before my eyes for about 15-30 minutes. Topped up a few places where it had soaked in and hadn’t had as much effect. Washed it off with the hose. Although it washed into the adjacent hedge it didn’t affect the plants, it may do with some more delicate plants. Path dried and looked cleaner than whenever I had pressure washed it previously. It continued to bleach a little more over the next few days and a year later none of the lichen or moss has grown back - it’s a shady side of the house and just a few months after pressure washing it would all grow back.

My biggest problem with our path and jet washing is that it can too easily wash out the stuff in the joins between the slabs.

Biggest tip would be to do it on a day when your windows are closed because it stinks, but the smell soon fades.
 
CaptainRAVE said:
I used a 5L sprayer. Dilution was roughly 1:4. Sprayed it on, left it (should have worn a mask, did wear safety specs and old clothes that could bleach easily). Watched it work before my eyes for about 15-30 minutes. Topped up a few places where it had soaked in and hadn’t had as much effect. Washed it off with the hose. Although it washed into the adjacent hedge it didn’t affect the plants, it may do with some more delicate plants. Path dried and looked cleaner than whenever I had pressure washed it previously. It continued to bleach a little more over the next few days and a year later none of the lichen or moss has grown back - it’s a shady side of the house and just a few months after pressure washing it would all grow back.

My biggest problem with our path and jet washing is that it can too easily wash out the stuff in the joins between the slabs.

Biggest tip would be to do it on a day when your windows are closed because it stinks, but the smell soon fades.
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Excellent - many thanks :)
 
As CaptainRAVE says it doesn't linger too long but best avoid times when there's people around. Of the solution I made 1:4 (5 litres mixed) that didn't go very far, only covered the front of the house but I suppose I was spraying it on liberally. I had finished spraying at around 3pm, left on for probably 45 minutes and after a rinse by 6pm the other half didn't notice any smell. It was quite warm and bright yesterday so that may have had an impact.

The slabs now actually sparkle in the sunshine :) however the pointing is shocking and needs to be done soon. Got a lot more to do before I get to that stage though and this was the easiest section to do.

y4myeDxikr8arSz6K-EBujnsTK3Irduo5MDATLWJr8Vt_MeRahg94UaXv8ZJrqkqoODLoTd-Cjk1HNnt5qEkAb69zTn8YO0kjXJ_JHfqN1AZoz4fxMZQVay6A9GnpSpEqbFgrsEt3cJNDjpV0X9ev5n_Pd3ViGogEearFHxqrDwiBs
 
Mysterae_ said:
As CaptainRAVE says it doesn't linger too long but best avoid times when there's people around. Of the solution I made 1:4 (5 litres mixed) that didn't go very far, only covered the front of the house but I suppose I was spraying it on liberally. I had finished spraying at around 3pm, left on for probably 45 minutes and after a rinse by 6pm the other half didn't notice any smell. It was quite warm and bright yesterday so that may have had an impact.

The slabs now actually sparkle in the sunshine :) however the pointing is shocking and needs to be done soon. Got a lot more to do before I get to that stage though and this was the easiest section to do.

y4myeDxikr8arSz6K-EBujnsTK3Irduo5MDATLWJr8Vt_MeRahg94UaXv8ZJrqkqoODLoTd-Cjk1HNnt5qEkAb69zTn8YO0kjXJ_JHfqN1AZoz4fxMZQVay6A9GnpSpEqbFgrsEt3cJNDjpV0X9ev5n_Pd3ViGogEearFHxqrDwiBs
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Looking good!
 
Composite decking isn't too expensive - £50ish per square metre, yeah it's more than wood but you do pretty much no maintenance other than cleaning for its entire life. Feels like a no brainer to go composite if you have to have a deck tbh?
 
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