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Case Study: Water stains on a brick wall

Ferdinand

Entry posted by Ferdinand

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A perennial problem with walls is water or other staining.

 

Yesterday I was walking past a fairly new wall, built perhaps 15 years ago. There are an interesting number of white stains now running down the wall.

 

What is the cause? My candidate is probably the weep holes, and also the 'shadow' from the road sign (which should be a few inches further out). I wonder if it also cheap bricks, or an insufficiently considered design. In any case, if stains show up this prominently so soon, then something on the detailing is not right.

 

What do you think, and what would you do differently?

 

( I have uploaded these at full size so you can zoom in.)

 

Photo 1.

 

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Photo 2.

 

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Photo 3.

 

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Photo 4

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Photo 5

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Ferdinand
On 22/10/2017 at 13:13, Onoff said:

I thought it was salts leeching out?

 

Probably, but it is also in stripes which suggests that there are particular causes.

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