Marks on Dryvit from awnings?

I have been doing 99% residential for the past 2 years and now that the season is starting again I have been getting more commercial leads then ever before. I went to this one today and i left with a number of many questions.

  1. There are marks on the Dryvit from where the old awnings were taken off. Are these a rust like stain that F9 Barc could remove? The rest of the Dryvit I believe I would use my 12V with a 3-4% SH mix to clean. (picture 1)
  2. Majority of the building is block that I will use my 12V with a 3-4% SH mix. Am I correct in thinking this? (picture 2)
  3. There is the “sludge” left over from new window openings cut out of the block. My assumption is that I should use NMD80 to clean this up? (picture 3)
  4. There was no exterior hose bib nor was there hook up for the sprinklers. Inside there is a large water main coming into the building that is used for the sprinkler system. It has a couple pressure regulators and valves but my lack of knowledge makes me not want to try to hook up to it. 1 pipe does lead outside and looks like there are garden hose threads (female) in the pipe where it ends, but I would need to mess with the valves inside to get water to it. My gut feeling says to not mess with it. What are your guys thoughts? (picture 4-6)

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Don’t even think about touching those valves or anything to do with the fire suppression system.

Super duper illegal unless you’re certified.

It’s also about 150 psi and 20gpm. Little more than you wanna be handling

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I just re-read this part. I don’t know about any female connections like that, but I thought fire suppression systems were dedicated specifically for that. @Innocentbystander and a couple of other firemen on here may be able to give you more information

That was my thought. I understand what is all going on there from my time as a firefighter but I also learned not to mess with it. For that reason alone Ill most likely pass on it. But the cleaning of the dryvit and other aspects I want to learn for future jobs. Everything residential around here is vinyl or aluminum siding.

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I would still need to mess with about 3 valves to get water flowing to it. That is 3 more then I think I should be messing with :slight_smile:

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Oh dang, I just saw you were a fireman too. Yeah fire suppression lines give me the heebie jeebies lol. Does the client have any ideas for water supply?

I couldn’t find an external water source so I asked the building owner. He walked over and pointed at the fire suppression system and just stared at me. He is also looking for the lowest bidder. I wanted to use this as a chance to practice bidding commercial jobs to see where my pricing is compared to residential.

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Ahhh, I gotcha. Sorry I don’t have much more to offer on the rest of your questions, that’s outside the scope of my experience. Not a lot of stucco here for some reason

I talked to the building owner and since the building is being renovated, he will have a hose bib installed. So that part is delt with

Nice! Perfect outcome. I just realized I can help with picture 3, that’s most likely just concrete dust and water from the concrete saw. NMD80 would definitely get you there, I’d start with a light mix and see how it works

What I called sludge is just that, concrete dust and water. Just dont know the actual name for it. Ive always wanted to try NMD80 but never had a reason to use it. I actually got a call for post construction clean up today where the entire building is brick and every part of it needs mortar cleaned off.

Nmd 80 is amazing stuff for mortar smears. It’s virtually effortless

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@mwpws That’s what I like to hear! Would it be that effortless for the new brick building I posted the pictures off? Or would that need scraping/scrubbing?

Scrape the chunks with a pole blade first, then do the NMD80 process. There’s some pretty good YouTube videos that’ll help. It does work surprisingly well on fresh stuff

Some real chunky stuff needs to be scraped but 99% of the thin smear type stuff come out with just rinsing.

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The third picture is a dry valve for the sprinkler system. The pipe outside is probably the low side drain. DO NOT HOOK UP TO THIS the flow switch will trip and alarm will go off fireman, and whoever will show up. Bad day and you may have to pay for the fire call.
First picture looks like the building water feed (the one with the meter) but its hard to tell by that picture.