[clarkson]

 hi all
 had a look at some stonework on an old victorian house today being used as an office.

 usuall 'limestone,sandstone' around all the windows and doors, a lot of algea moss etc.

 someones told them it needs an acid rinse i said i would find out anyone done any.

 i thought of pw only but dont think it will clean the litchen off. thought of hypo but worried about the windows and frames(painted wood)

 all suggestions appreciated.

 there is also an access issue but will post another thread on that, if we decide to touch it.

 thanks

 john

[Rob_Mac]

John

Do you think it will come off with a little hot water??

Rob

[Blast Away]

We did this one with HF as the custie didn't wanna pay out for scaffold and blasting.

Unfortunately due to the painted wooden frames the sheeting kept coming away in the weather and jet washing etc and we damaged some windows with the acid.

[Matt Gibson]

Lee, there's a way to polish out the etching from the acid. You use a glass polishing powder. I had to do a few in London.

[Blast Away]

Lee, there's a way to polish out the etching from the acid. You use a glass polishing powder. I had to do a few in London.

I believe so pal, it was done under insurance.

[clarkson]

John

Do you think it will come off with a little hot water??

Rob

hi rob
are you saying steam it?

john

[Blast Away]

John

Do you think it will come off with a little hot water??

Rob

hi rob
are you saying steam it?

john

If it's carbon like shown above, steam cleaning won't do it.

[trevor perry]

you can buy a liquid that you paint the windows with before acid cleaning, it sets in a couple of minutes and when finished cleaning you just pull it off the glass like a sheet of plastic it is pretty good stuff but i have still managed to damage the ocasional pane with acid as it has managed to get behind the coating

[Smurf]

There is specialist kit you can buy for that sort of work.
http://www.stonehealth.com/

A chap in my town has doff & Torc kit and does very well indeed.  I recently passed over a lead for him and he quoted over £12,000 + vat just to clean brickwork on a 5 floor building. That's not including scaffolding either as it being supplied/erected by the client.

[Matt Gibson]

Trevor,

Do you know what that product is called?

[trevor perry]

Trevor,

Do you know what that product is called?

i will find out when i am next at the office tomorrow

[Matt Gibson]

Ta

[trevor perry]

Hi matt
  just looked at the office it was a coating supplied by neolith chemicals i tried ringing them as i couldnt find the product on the website but unfortunately they have stopped supplying it now.

[Matt Gibson]

Ahhh ok, theres a neolith supplier just round the corner from me too... ahh well, thanks anyway mate.