I know it’s a blurry picture, but can anyone tell me what this is? It took multiple applications of SH mix to remove. It looked like mold or algae to me. I was running a 1.5% SH mix.
Lichen, read about the wonderful fungal and algae growth.
Normal house wash mix and just knock them off with a soft brush. Much faster than hitting a bunch of times with super strong mix. Give them a long dwell time too, once they are completely white they are much easier to get off. What you show in that pic is probably 25% of the houses I wash
1 Like
My method for that would be 3-4% out of the pump sprayer. Apply downstream mix, then pump spray, then dwell while washing as much of the rest of the house that i feel comfortable with and then it should be gone by the time i return. If not mist side of house, reapply pump spray and repeat. Rarely do i need to reapply but it happens occasionally. Im weary of brushing that i might disturb the oxidation layer. Im personally a bleach bandit. If sh doesn’t work im not your guy with the exception of rust. If we had wood decks down here i would restore those also but we dont. Too much easy work to fiddle with the tedious. Leave that to the niche guys so they can do thier thing
1 Like
Just saw you have 1 hour read time. Bump that up to 10 by the end of the week and keep at it from there. Tons of info to learn on here. From others misfortunes so you dont have to learn them the hard way to solving specific problems for customers that you did not create or learning processes you would have never realized existed. This site is a gem
2 Likes
I’m with you. I already have the soft brush out for gutters and fascia so I just bang it out. I had two houses last week that both looked like heavy algea on the north side. Put the HW mix on it and algea was brown and those lichen spots were there. 5 minutes with the brush and I was good.
OP - get yourself a 20 foot extension pole. Most of the time you won’t need to extend it, but when you do you will wish it was 25 feet. The skinny part of the pole flexes like crazy when extended out.
