Anyone cleaned the exterior of their brick house using chemicals?
I have a victorian house on a busy road which has about 100 years of road dirt on it. It’s built from traditional yellow bricks (London stock).Posted 5 years ago
I’ve seen some houses locally have had their bricks professionally cleaned and they look amazing. It’s expensive though (around £600 for the front of a small house) so I am thinking I could do it myself.
Having read a bit online it seems like you use an acid based chemical which you brush on and then rinse off with water.
Was wondering if anyone here had done it and what your experiences were?
I am concerned about choosing the best chemical for the job and also don’t want to damage the bricks which seem pretty fragile.sandwicheaterSubscriber
Did it ourselves but on the internal chimney. Blooming hard work, though believe that was due to the lack of space. If the bricks can take some metal brush action would say it’s worth it. I’d spend a few minutes scrubbing a few bricks to make sure they are still in good knick. Ours crumbled pretty badly so gave up in the end.Posted 5 years agostupotMember
Be careful if you use brick acid.Posted 5 years ago
I was working on a building site. Got given some brick acid and told to clean a wall. Was wearing paper overalls, but the acid managed to get on my tracky bottoms, these then melted!
Only noticed when my legs started to itch, took the overalls off and the trousers were just ribbons!
Thanks for the replies.Posted 5 years ago
Don’t want to use a pressure washer or wire brush as I am concerned about damaging the bricks and mortar (house probably needs to be re-pointed really but that’s another story).
Hence I was thinking of using brick acid or similar and a soft brush and rinsing off with a watering can.
I suppose I should just give it a go and see if it works.
Thanks for the safety tip though – will be sure to get suited up!bay1472Member
We’ve recently had an extension built and left one of the old exterior walls which is now on the inside exposed. The builder gave us some brick acid which you can dilute down and wash the walls with. Its good stuff but as above you can see the mortar between the joints bubbling when the acid touches it. Took us 2 days just to get the finish we wanted but it does work.
Look in adecent DIY shop and you can buy it but the decent stuff according to my mate is expensive. Its bloody hard work and for the sake fo £600 I’d pay that as those guys will have all the tools to do a decent job.
Hope that helpsPosted 5 years agotthewSubscriber
Brick acid may be a fairly quick process, and it’s cheap enough to try though it is really used to get off, (alkaline) morter smears after pointing or building so it may not work. Certainly didn’t when I tried to clean old paint off our house recently.
@ Stupot. That’s criminally poor health and safety management on so many levels, (and I mean literally criminal!)Posted 5 years agostratobikerMember
Use a 10% – 15% mix of household bleach in water.
Spray it on with a garden sprayer. Leave it for an hour. Wash of with plenty of clean water.
Try it on a test patch first.
Becareful for any pets, or water run-off into the clean water source.
It’s what lots of people use in France to wash their ‘crepi’ before repainting.
You might have to do it more than once.
SBPosted 5 years ago
The topic ‘Anyone cleaned the exterior of their brick house using chemicals?’ is closed to new replies.