[mike roberts]

Has anyone had any experience cleaning above type of tile ??
Thks Mike

[Roger Oakley]

Any photos Mike

[Kev Martin]

Has anyone had any experience cleaning above type of tile ??
Thks Mike

Mike

I have never cleaned them.  I would firstly approach Marley and ask them for advice.  Unless someone on here has experience.

Kev Martin
Marble Life ltd

[mike roberts]

Is that big enough!   Whoops

We find in general if you aproach any tile manu especially Marley they will state tiles should not be pressure washed full stop... as long as you are sensible with pressure we have never had a problem.

We have spoken to a few for above tile all have said 'NO' to pressure washing, However we have cleaned a few for customer as a demo -  low pressure / variable lance no problem.  It seems to be the usual disclaimer from manu. As long as customer accepts liability we will go ahead, just wondered if anyone else had encountered them.

[Blast Away]

Like these mate?

Same as the older McDonald's roofs before the tin one's now. I've cleaned a few and lichen eats into them and once cleaned the fibre shows through white weathered.

[Roger Oakley]

Is that a roof Mike? Ok just seen Lee's reply before I answered, I'd consider a hypo mix to clean, but a lot to address, wind drift, runoff etc etc and what are you going to be left with after cleaning. Any chance you could clean one or two tiles and see the out-come and then decide?

[Rob_Mac]

I was asked to clean some tiles that looked exactly like those on the old railway station at Bath.

They turned out to be Asbestos!!! Be careful

Rob

[mike roberts]

Is that a roof Mike? Ok just seen Lee's reply before I answered, I'd consider a hypo mix to clean, but a lot to address, wind drift, runoff etc etc and what are you going to be left with after cleaning. Any chance you could clean one or two tiles and see the out-come and then decide?

Hi Roger yes its a roof - four large units, Using any chem could be a problem - we have a limited water supply hence we were planning on recycling... We have already carried out demo using low pressure / var lance seemed to clean up easy enough. Prefer to use turb but I think it will be to aggressive.

Rob we have already taken a sample to our local supplier he has confirmed they are not Asbestos, we will also ask for a report on the building prior to proceeding to cover ourselves, if they are A it should be noted.

[Roger Oakley]

Mike,
OK if you are going the recycle route then you are not going to be wanting to use hypo.
Does it clean up with just water? as you could use a brightener that I use on wood, afterwards to give it a boost. When clean are they a white concrete colour?

[Kev Martin]

Mike

If the manufacturer advises no  Pressure washing then surely they advise a recommendation to clean them in their MSDS.

Kev

[Alan McTernan]

Hi Mike,

Have you considered scraping/brushing the moss from the roof and then applying MossGo? The only problem is that the results aren't immediate but it works

Hope this helps.

[mike roberts]

Mike,
OK if you are going the recycle route then you are not going to be wanting to use hypo.
Does it clean up with just water? as you could use a brightener that I use on wood, afterwards to give it a boost. When clean are they a white concrete colour?

No Roger they are a grey colour, from the sample the colour is even through out the tile. The white seems to be purely down to the weathering, as Rob mentioned initially I thought they were asbestos purely from their appearance. The concern the customer has is if we 'deep' clean them will they stick out like a sore thumb - as its a few units on a business park - However he wants to remove all of the moss ... we can apply a treatment aimed at moss but the results are far from instant!

Hi Alan just saw your post and yes  to chem considered it ....brushing scraping will take an age all access is boom apart from one pitch rope access plus cat

[mike roberts]

Mike

If the manufacturer advises no  Pressure washing then surely they advise a recommendation to clean them in their MSDS.

Kev

Yep for this type of tile hose and soft brush  - Marley do not see moss as a problem on a roof its natural weathering

[Alan McTernan]

I use extendable scrapers that we can use from the roof line on most jobs and then spray the roof using the MossGo system. Or you could low pressure wash to remove the worst of the moss and then spray with MossGo

[Roger Oakley]

Mike
Do you have any low pressure pumps, Shuflo etc?

[mike roberts]

I hear what you are saying ref mossgo.. but the units are up for sale hence client is after instant results, maybe its an alternative option to offer  :
 If the main moss deposits are removed 'by hand' how long does it take for the remaining moss / lichen to be killed removed.

[Alan McTernan]

Unfortunatly it can take 4-6 months for the full results

So sounds like its not an option!!!

[mike roberts]

Unfortunatly it can take 4-6 months for the full results

So sounds like its not an option!!!

ah

[Roger Oakley]

So Mike what does the client want, just a clean-up to sell or a full blown clean?

[mike roberts]

So Mike what does the client want, just a clean-up to sell or a full blown clean?

He is after the moss / lichen being removed - without harming the tiles -- instant results - but doesnt want them to stand out -----
so not much really     seems like one of my normal customers 

[mike roberts]

So Mike what does the client want, just a clean-up to sell or a full blown clean?

He is after the moss / lichen being removed - without harming the tiles -- instant results - but doesnt want them to stand out -----
so not much really     seems like one of my normal customers 

to be honest mate, I view it in a similar way to chewing gum removal - if you are doing the job - do it properly dont just remove the gum (spot clean) clean all the paving back to new. Same as roof cleans - clean the whole roof then no one has any comebacks we all know where we stand - thanks for your inputs appreciate it.

[Roger Oakley]

OK so if you  can forget the recycling route then I would use hypo 2:1, pre-wet first then apply the hypo, dwell for 20-30 mins, then low pressure off, you would have to make the call re wind drift, run-off etc, if you have any stubborn lichen, then spot clean with the hypo after the first clean. Anything else sounds like it is not what your client wants.