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Are these grey concrete bricks, rather than actual fired bricks? It is hard to tell from the photo. But if concrete, then these is common with concrete block, and it is apparently salts leaching from the concrete and is possibly due to moisture moving through the concrete..
David321: Do I have hard water? It appears so from the staining and the fact soap doesn't bubble up in our water is also a tell tale sign apprently.
That sounds circular and anecdotal to me. Again IANAE but if this was me I would get the water tested to confirm that it really is ‘hard’ - before spending money on what might be an incorrect solution.
If the staining is being caused by hard water getting on the bricks from a garden sprinkler, it wouldn’t give the patterning shown in your photos - where some bricks are affected and others immediately adjacent are not. In your second photo there’s one course of stained bricks (the highest row of stained bricks) where that course is stained and the ones above and below are not. How could that result from hard water from a sprinkler? Same applies in your first photo.
Sometimes I just sit and think. Other times I just sit.
mattwnz:
Are these grey concrete bricks, rather than actual fired bricks? It is hard to tell from the photo. But if concrete, then these is common with concrete block, and it is apparently salts leaching from the concrete and is possibly due to moisture moving through the concrete..
Yes - great and important question.
Sometimes I just sit and think. Other times I just sit.
eracode:
mattwnz:
Are these grey concrete bricks, rather than actual fired bricks? It is hard to tell from the photo. But if concrete, then these is common with concrete block, and it is apparently salts leaching from the concrete and is possibly due to moisture moving through the concrete..
Yes - great and important question.
The OP pointed out in this post that as far as he was able to determine it wasn't efflorescence.
neb:
The OP pointed out in this post that as far as he was able to determine it wasn't efflorescence.
Yes, saw that - but what he’s saying is the cause (hard water from a garden sprinkler) doesn’t seem to be supported by any hard (excuse the pun) evidence on the chemistry of the water or by the photographic evidence.
Sometimes I just sit and think. Other times I just sit.
eracode: That sounds circular and anecdotal to me. Again IANAE but if this was me I would get the water tested to confirm that it really is ‘hard’ - before spending money on what might be an incorrect solution.
If the staining is being caused by hard water getting on the bricks from a garden sprinkler, it wouldn’t give the patterning shown in your photos - where some bricks are affected and others immediately adjacent are not. In your second photo there’s one course of stained bricks (the highest row of stained bricks) where that course is stained and the ones above and below are not. How could that result from hard water from a sprinkler? Same applies in your first photo.
Unless you have your own bore you shouldn't need to get the water tested, your local authority will be familiar with the water it supplies.
The OP has already tried acid cleaning. Maybe the different staining shows the difference in appearance.
Edit We are at Foxton Beach where the local water doesn't dry leaving window glass looking much cleaner than salt spray. Several neighbours have ~5000l rainwater tanks just for things like cleaning the car.
eracode:
David321: Do I have hard water? It appears so from the staining and the fact soap doesn't bubble up in our water is also a tell tale sign apprently.
That sounds circular and anecdotal to me. Again IANAE but if this was me I would get the water tested to confirm that it really is ‘hard’ - before spending money on what might be an incorrect solution.
If the staining is being caused by hard water getting on the bricks from a garden sprinkler, it wouldn’t give the patterning shown in your photos - where some bricks are affected and others immediately adjacent are not. In your second photo there’s one course of stained bricks (the highest row of stained bricks) where that course is stained and the ones above and below are not. How could that result from hard water from a sprinkler? Same applies in your first photo.
I see what you're saying, however that part mentioned where some bricks are affected and others immediately adjacent are not is more of an anomaly compared to every other bit. Its a bit hard to portray from the photos I have but as I have mentioned when you are standing in the yard and picking the most logical place for a sprinkler to be positioned (probably done to get the grass established), you would then expect the water spray to hit where the bricks are stained.
The brick work around the deck is spotless, as there is no need to irrigate a deck therefor the bricks were not hit with the sprinkler.
The service side of the house, the bit hard up against the fence with just a stone path (no garden or grass) has very clean bricks, no need for a sprinkler down there either.
I have added a couple more photos, one of them (with my shadow) is looking the other way at the same area where you spoted some bricks that were stained and the others immediately adjacent are not, this angle gives a better perception and shows it is not quite how it seems as per the photo you refer to.
Another photo shows an arch of staining, likely coinciding with an expected sprinkler pattern hitting the ground at the base of the fence. This photo shows staining to the left of the window, staining on the black aluminum window then staining on the bricks to the right of the window. You could literally draw a curved line starting high on the left and arch down to the right and the staining would be under the line.
Efflorescence would not appear on window aluminum like that, that fact alone complied with the pattern of staining and the opinion of a bricklayer who has come across the same problem has lead me to believe it is hard water staining, although I admit ill never be 100%, whatever it is it still seems (from research online) that Hydrochloric acid is the "go to" for stubborn stains on brickwork.
Just looking for ways to make the cleaning a little easier (if possible) and/or mitigating any future reoccurrence.
#1 Pick a sprinkler for the lawn that sprays away from the house.
Bung:
#1 Pick a sprinkler for the lawn that sprays away from the house.
Will be specifically requesting this for the irrigation quote, although I know there is a chance wind may blow water back on to house.
eracode:
The first photo of your two new photos does look more like the sprinkler cause you're talking about.
But as @Bung says, obviously now try not to get water on there in the first place.
Thats the plan, but the first step is trying to get this staining removed.
Have lived in very hard water area overseas and you will know if you have it, just look inside your kettle or electric jug and you will see the build up of white/grey on and around the element. Every few months I would cover the element with vinegar and water and limescale would disappear.
Hi
Are you in ChCh?
A family member has the excat same brick and the same issue.
its somewhat got better over the years and I’ve started to think it’s coincidentally at the same time the council reduced the choline dosage in the water supply..
I only see this mostly on the north facing side of the house however…. Somewhat less rain hitting due to the soffits.
Goosey:
Hi
Are you in ChCh?
A family member has the excat same brick and the same issue.
its somewhat got better over the years and I’ve started to think it’s coincidentally at the same time the council reduced the choline dosage in the water supply..
I only see this mostly on the north facing side of the house however…. Somewhat less rain hitting due to the soffits.
Interesting, I am actually in Rolleston, which has had its water chlorinated roughly the same time as CHCH. The staining is also strictly of the northern facing parts of the house.
If I could somehow know 100% if was chlorine staining the house id consider a whole house filter rather than just the under sink one we have, but in saying that I think the filters only actually remove the taste and smell of the chlorine and don't actually remove the physical chlorine so the staining would probably percist.
The acid is helping remove it, but its very very tough.
Did the staining come off you family members bricks naturally? or by "got better" do you mean there is less new staining occuring?
Thanks!
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