The exterior walls of my house mainly consist of pebble dashing. I plan to clean the walls as currently there is a small amount of red dye appearing (I think this is coming from the brickwork underneath). Plus the walls are just starting to get grubby with a little moss and algae.

Is there any specific products or techniques I can use to clean up the pebble dashing?


1 Answer 1


I doubt brickwork would leach through the typical 1" or more of mortar. It would have to be something near the surface.

A mild detergent with a mildewcide added should be sprayed on, allowed to soak per directions and then scrubbed lightly, followed by a rinse. If the red dye comes out, I would use a sealer to help the surface dry off more quickly after a rain and it will keep the walls cleaner.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.