Tips on removing cement from interior wall after removing fireplace


Postby corum_uk » Sat May 14, 2016 7:06 pm

Hi,

I've recently removed an old brick false fireplace and have been left with patches of cement stuck to the wall.

Can anyone offer some advice on the best way to remove the cement.

A photo is here for reference[img]https://www.dropbox.com/s/sobqvy2o0wedvjn/IMG_20160514_200102.jpg?dl=0[/img]

Thanks.
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Postby welsh brickie » Sat May 28, 2016 3:46 pm

you can buy a brick acid from your local builders merchants.
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Postby corum_uk » Sun May 29, 2016 12:55 pm

Thanks for the tip. Having looked around a bit I can see that 10% hydrochloric acid is a typical concentration for brick acid, but proper muriatic acid is much stronger at 38.5% (but much harder to find).

Would the 10% strength solution be sufficient do you think? Also I note one site that warns against using muriatic acid indoors due to the corrosive effect it can have on metal/electrics nearby and due to the toxic vapours etc. Do you have experience of successfully using it indoors to remove cement from plaster?

Thanks.
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Postby welsh brickie » Mon May 30, 2016 3:54 pm

the room must be well ventilated, and use a mask , gloves and googles
Just use normal acid and apply, wait 5 minutes then wash the material with water.
It may take a few applications, Don't use muriatic acid its too strong.
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Postby corum_uk » Sat Jun 04, 2016 10:54 am

Ok thanks for your advice, I'll give it a try.
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