Repointing Fail

[Russia02]

Hi all,

I recently repointed a wall where most of it had fallen off over age.

I repointed it myself as I had very little funds.

I repointed it black and it looked pretty good.

A year on and a bit weather beaten it is not looking that good.

There appears to be a few white patches forming.

Can I clean it with something or do I have to admit defeat and get a professional in to redo it all?

 

[^woody^]

It's falling out isn't it? If so any white patches are the least of your worries.

Do you have a closer up photo?

White patches are salt and need to weather away, not be washed off.

 

[Russia02]

No, they are filled albeit a bit rough but it is starting to go a bit white in places.

Salt would make sense and sadly I was contemplating washing it.

So best to leave and let the good old british weather do its thing?

 

[stuart45]

A lot of that looks like the mortar stains which have faded over time which is normal for a dyed mortar. Black tends to turn light grey.

 

[^woody^]

Oh OK. Yes black dyed mortar is prone to white staining and fading to grey

 

[Russia02]

Okay cool.

It has started to go grey in other areas which is not a problem.

Do you think the white stains will weather down to a grey colour eventually?