Porcelain patio grout staining

[Hels13]

Me again! 

 

I've recently had a porcelain patio laid with sandy colour grout. 

He was wetting the slabs while putting the grout on, but some has come away from the joints (he's coming back Monday to fix this). 

 

However, there now seems to be a lot of staining on my tiles from washing the excess grout away. Is there an effective way to clean these properly please? 

Last pic is what colour they should be. 

[nod]

He should have sealed them before grouting 

[Nickfromwales]

Yup. You can use a grout film remover, or patio cleaning 'acid' and scrub it with a stiff broom.

 

Porcelain shouldn't need much in the way of sealing, but the installer should have cleaned this all up properly instead of leaving it to cure in sunlight.

 

His problem, not yours btw, so tell him to get scrubbing!

[Dave Jones]

its normal no matter how many times you clean them while grouting you get a film left. as long as the grout was decent can just jet wash it all. 

[Emanresu]

On 15/07/2025 at 08:53, Dave Jones said:

its normal no matter how many times you clean them while grouting you get a film left. as long as the grout was decent can just jet wash it all. 

 

Just having a patio done with porcelain tiles. The installers specifically stated not to use a jet wash as it can dislodge the grout. They suggested hiring some form of scrubber (insert joke here). As they do a lot of groundwork including some high end London work. Wonder if they are just being OTT.

Edited July 29 by Emanresu

[Andehh]

For our porcelain, hot soapy water and a good broom keeps it perfectly clean! Even under a willow tree, and bird shit.