Edwardian bathroom wall tiles: grouting

[MarkN]

I've had a look through the forum to see if anyone else has asked the same questions: apologies if this is a repeat!

We have an Edwardian house with square-edged ceramic tiles in the bathroom. Although a bit battered, we want to keep these. Gaps between the tiles vary, from hairline to 3mm (bit of movement over the years).
Main problem is that there is black/brown staining between the tiles. This I think I can clean, old toothbrushes and dilute bleach/fancy grout cleaner. But how to I then seal up the gaps?
Ordinary grout obviously fine for some parts, but the hairline/0.5 mm areas are a puzzle to me.

Would be most grateful for your collective advice.
Thanks
Mark

 

[enduro]

Grout is your only answer really on this one. But this is a long shot and i really wouldn't say it the best way on the very fine joints is using either Aqua mix grout colorant this is and Epoxy coating we use on grout also Mapei do one, could be worth a try.

 

[diamondtiling]

hand made tiles usually have the same problem, the gap can vary from virtually nothing to 3/4 mm, grouting is your only option, make it a little thinner than normal and wash it into the gaps, it will work fine.

 

[DHTiling]

The finer/smoother the grout the easier it will be to to grout smaller joints..

Mapei do a unsanded grout called keracolour SF and this does minimal to 4mm joints..

 

[MarkN]

Thank you, everyone, really helpful!

I've ordered some of the Keracolour SF, certainly looks to be the stuff i need.

Running out of excuses now, guess I'll just have to get off my backside and do the job..............

Mark