I had a guy tell me the other day that a commercial client doesn’t want bleach on their stucco because it will bleach it out? Isn’t that kinda the idea? If it is molded and mildewed, it obviously needs “bleaching out” right? I have to admit, I haven’t ran into any stucco yet but I know it’s coming. So what do we use? If it’s HW mix, how would you explain to a client what is needed.
We are scheduled to do this building in the spring. The entire exterior is stucco. We would never get it cleaned(properly) without sodium hypochlorite.
They were going to paint over this until I came into the picture. My contact had a dead battery in a packing lot and I gave him a jump. One thing lead to another and we started talking, over coffee, about the truck I had with me. He asked about the tanks, hose reels, etc. Sometimes it’s better to be lucky than good.
Just finished a 3 story stucco job. You just have to do a better job of teaching your customer. Help them to see the amount of liquid chlorine will in noway be strong enough to hurt stucco and it will in noway discolor it. Also tell them they have two options to get that thick of mold out of the stucco…blast in with thousand of pounds of pressure knocking off countless numbers of granules or worse run a high risk of knocking a hole in the stucco or the soft wash option using a controlled amount of chlorine along with a commercial surfactant that will allow you to safely clean their building at low pressure with no risk to integrity of the building.
Educating our customers and managing their expectations is of paramount importance and at times difficult. Some customers, still to this day, believe that blasting a surface with a pressure washer is the only way. On numerous occasions I’ve had customers sit and listen to everything I say and only turn around and say “Okay, let’s pressure wash it”. It can drive a sane man crazy(ier).
When a customer says “bleach it out” then they think that the stucco will turn white. You have to educate the customer and assure them that that’s not the case. It’s ok if a customer has concerns about chemicals and so forth, but you are the expert and if a customer tries to tell me how to do my job then I will just walk away.
The reference materials on Sto.com suggest using TSP to clean stucco. And adding bleach when algae and mildew are present.
Any advice on TSP on stucco.