[Tony Stewart]

I have a customer who I do carpet cleaning for and he's asked me to clean up the outside of the terrace. They need a clean but with them being sandstone am I OK to clean them with a fsc and then deal with the green algae with Hypo. Tried a quick test with a rotary and a brush with an alkali cleaner but it did not really make a difference.
Could use my truckmount with a spinner but is that a bit of overkill. Area is 350 sqm.

Thanks in advance guys.

[Neil Jones]

Hypo and FSC fine but still test. Upsel a sealer on those. Two hours application max but nice money.
Impregnator would do the trick.

[Kev Martin]

Please tell me step by step how you did the test with the rotary, high alkaline and a brush?

Which Rotary?
Which High Alkaline and what dilution?
Dwell time?
Type of Brush?

[Tony Stewart]

Hi Kev
I used a generic alkaline cleaner 1:20 with a victor slow speed rotary and a scrub brush attachment. Let ir dwell for a few minutes. Didnt do much so put down a little 400 grit honing powder and cleaned a couple of tiles. As it did not get any wow factor I just explained that I could clean it with more force using the spinner or power washer but they would have to schedule it in with the window cleaners afterwards. I explained that the algae would come back as it was just the position of the building. Did not have my rocky on the van but wouldn't have thought it would have made that much difference. Hence the pressure washer route with the fsc.
Kev I can price in one of your impregnator sealers on this one provided  that it will look fantastic and save them on a future clean - just need to add it to the quote this weekend and it's only one extra line.

[Kev Martin]

Hi Kev
I used a generic alkaline cleaner 1:20 with a victor slow speed rotary and a scrub brush attachment. Let ir dwell for a few minutes. Didnt do much so put down a little 400 grit honing powder and cleaned a couple of tiles. As it did not get any wow factor I just explained that I could clean it with more force using the spinner or power washer but they would have to schedule it in with the window cleaners afterwards. I explained that the algae would come back as it was just the position of the building. Did not have my rocky on the van but wouldn't have thought it would have made that much difference. Hence the pressure washer route with the fsc.
Kev I can price in one of your impregnator sealers on this one provided  that it will look fantastic and save them on a future clean - just need to add it to the quote this weekend and it's only one extra line.

Tony

You made some mistakes.  Call me over the weekend on 07770 598855 and I will talk you through it

Kev

[Tony Stewart]

That's kind of you... Will try you tomorrow morning

[Kev Martin]

Anytime  after 9am

[chris scott]

FSC ,bleach and fairy liquid mix ,Teflon sealer. That is a badly laid patio that will allways give problems.

[chris scott]

FSC ,bleach and fairy liquid mix ,Teflon sealer. That is a badly laid patio that will allways give problems.

[Tony Stewart]

Thanks for that advice Chris. They just want it cleaning and know that with the position of the building it will always attract green areas. Chris on the Teflon sealer I am a bit reluctant to upsell it as I thought that with some of these sealers that the area had to be dry. Is that a limiting factor? With the weather as it is and the fact that the green moss will return I just want to be sensible with them rather than always trying to shaft a customer. Would this be a batter option for a clean and sell then the seal deal in the Spring\ Summer. Is that how it works?

[Smudger]

A good dose of hypo will revive this area and there are sealers that can be applied in damp conditions

Darran

[chris scott]

We use a waterbased Teflon (Kevin martin can get hold of it) it's breathable and fairly resiliant to being applied on damp substrates…although you do need to be sensible.
The problem I see from that image is sandstone is pourous and the water is being "wicked up"  from below evident from the "damp" stains you can see,these areas will "go mouldy" from the inside . You also have problems with it going green from above…normal things that affect paving shade,bad drainage,type of stone etc.
I would say it has been layed on a wet mix…tap the flags .Do some parts sound hollow?

[Smurf]

14-15% hypo and bleach the fook out of it. Job done
Well that is what the paddy travellers do and say the sealer is in the water...That will be 1500 euros missus ta very much 

[Tony Stewart]

Thanks for the help guys-stuck in the quote so see if they bite!