Masonry cleaning - product advice wanted

6 Feb 2014
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United Kingdom
Can anyone help me choose a product/method please,

Basically the brick/mortar gable end of my house is very stained - particularly where an overflow was dripping down the wall for months before I moved in - there is a lot of green limescale or mildew & a 'white' substance - this is covering a lot of the wall, it basically looks awful.

Can anyone recommend an good cleaner to get rid of this & being the brickwork back to life? - the access isn't great, as there is a conservatory extension below, so preferably something that could be applied using a jetwash with the product in the detergent bottle?.

Failing that, an extendable/telescopic cleaning brush should suffice

Thanks in advance
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Could you post a picture?

I'd suggest you let the offending wall have a few months of sun pre any action, to help it dry out.

Have you extended the overflow yet?

Is there any internal damp in the area of the staining?

Sounds like a mixture of salting and excessive damp allowing moss, or mildew to start up. Bleach soak, scrub with a floor brush and a gentle wash down should sort it.
Or patio cleaner might be a better all in one fix.

It would still be better to post a picture of the area and the access issues.
Yes I can post a picture.

The overflow has now been sorted - no longer dripping on continuous basis & has a longer pipe on.

I've been reading a Bleach soloution works well

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