[JandS]

Anything generic out there for cleaning a stone headstone.........not wanting to get into it just wanting something one off for Father in Law's grave headstone........

[ray l]

you could pre mix a biocide solution into a spray bottle ,

[Splash & dash]

Depends what’s on it , maybe just warm soapy water and scrubbing brush , if algae grown a hypo mix but if lead lettering on it don’t  get it on that as it will turn it brown . Biocides will kill algae as well but it’s a slow process .

[NWH]

Wet and forget I’ve used it on the same and it works make sure there’s no rain due in the next 12 hours or so as time passes it gets cleaner,soapy water and a brush doesn’t touch it.

[Smudger]

As said hypo but you really need to double check what stone/marble it it - you may also need to get permission to clean it

Probably ok with very modern ones but the older headstones usually have to stay “natural”

Darran

[Ggh]

I used to be a memorial mason.

What kind of stone is it? Is it polished?

A mix of caustic soda and water (goggles and gloves) to applied, let it cook on for 5, then pressure was off, or brush off with lots of water. You’ll need to re paint the inscription.

[NWH]

What’s the best stuff for a pourous like stone wet and forget works but I’d like something that done a better job.

[JandS]

Don't know what stone it is never seen it...wife just told me it needs cleaning.

[Ggh]

Don't know what stone it is never seen it...wife just told me it needs cleaning.

Photos!
 Be careful what you use on marble, any bleach will leave the surface  open and you’ll be back to square one after a winter.

Also if it’s a ‘honed’ finish, be careful don’t touch it if you want it to look mint after.
Where in the country are you?

[JandS]

West Yorks.

[Jamie Thomas]

Our granddaughters head stone is polished we just use soapy water gets the algae and crap off.