What's the ideal bleach % for house washing? - Page 2 - Paint Talk - Professional Painting Contractors Forum
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Old 07-29-2016, 04:56 AM   #21
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The bleach I buy from CSC is 16% good stuff
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Old 07-29-2016, 07:50 AM   #22
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I use 16% bleach it's easy to store
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Old 08-02-2016, 10:10 PM   #23
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I stopped using Bleach when I found out it does not kill anything. All it does to mold and mildew is the same thing it does to your clothes, takes the color out. To kill mold and mildew you need to use a fungicide, or if you want, straight white vinegar(which will kill about 80% of all molds). Don't take my word for it. Take his. And ask any mold remediation specialist.

https://www.normi.org/articles/bleach-mold.php
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Old 08-03-2016, 11:18 AM   #24
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Wow, great article! Thanks.
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Old 07-11-2017, 07:58 PM   #25
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Quote:
Originally Posted by Damon T View Post
I spoke with my local pressure washing supply company and the guy said he can get me bleach in any concentrate up to 62%!!!
I think pool bleach is typically 12.5 and household is now 8% around here. Downstreaming is typically 1:10 so would 20% be too high? That would really only be 2% on the wall. Most recipes say 1 part bleach 3 or 4 part water and some soap. Which is 25 or 33% yes?
Otoh I've used household bleach and it seems to work pretty well.
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Maybe I should have looked into it before I used it, but I got the Splash brand pool bleach at Menards because I saw the 12.5% content. Anyone have any neg. experiences with using pool bleach? I've only used it to bleach out mildew on bare wood. Initially I soaked siding well with it, rinsed at high pressure, but revisited a few spots that could have still used more brightening. I didn't re-rinse yet, but its not too late. With feeding it into my pressure washer downstream, not sure what the concentration is, and also wondering if rinsing is actually necessary. I know the textbook answer is to rinse it all away, but I'm thinking that may not always be true. Esp with bare wood that absorbs. Will there be any residue after a week? Will it evaporate or sun bake away? How well does it rinse off for painting? I only used TSP-PF with the bleach initially, but only pool cleaner on the second go-round. Anyone have some experience they'd mind sharing, I'd appreciate it.
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Old 07-11-2017, 08:00 PM   #26
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Quote:
Originally Posted by Raptorman View Post
I stopped using Bleach when I found out it does not kill anything. All it does to mold and mildew is the same thing it does to your clothes, takes the color out. To kill mold and mildew you need to use a fungicide, or if you want, straight white vinegar(which will kill about 80% of all molds). Don't take my word for it. Take his. And ask any mold remediation specialist.

https://www.normi.org/articles/bleach-mold.php
What product DO you use? I'd like to know. Thanks!
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Old 07-12-2017, 12:19 PM   #27
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Quote:
Originally Posted by J R Painting View Post
Maybe I should have looked into it before I used it, but I got the Splash brand pool bleach at Menards because I saw the 12.5% content. Anyone have any neg. experiences with using pool bleach? I've only used it to bleach out mildew on bare wood. Initially I soaked siding well with it, rinsed at high pressure, but revisited a few spots that could have still used more brightening. I didn't re-rinse yet, but its not too late. With feeding it into my pressure washer downstream, not sure what the concentration is, and also wondering if rinsing is actually necessary. I know the textbook answer is to rinse it all away, but I'm thinking that may not always be true. Esp with bare wood that absorbs. Will there be any residue after a week? Will it evaporate or sun bake away? How well does it rinse off for painting? I only used TSP-PF with the bleach initially, but only pool cleaner on the second go-round. Anyone have some experience they'd mind sharing, I'd appreciate it.
Nothing wrong with pool bleach, as long as it's Sodium Hypochlorite. Only issue with buying it at big box stores is you'll never really know how fresh it is. Most should be time & date stamped, so look for the most recent dates. But even checking the dates won't tell you how it's been stored, whether it's been subjected to too much sunlight or heat, both of which will degrade the bleach.

Rinsing the bleach is absolutely necessary. Leaving it on the wood will break down the fibers and lignin quickly. Not rinsing thoroughly will leave a film on a house & windows. Ask any professional pressure washer how much time he spends soaping vs. rinsing and they'll tell you the rinsing is what takes all of the time, but it's an absolute must. The only possible exception for not rinsing bleach would be if you were roof cleaning asphalt shingles, but that's a debate for another day.
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Old 07-12-2017, 02:32 PM   #28
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Quote:
Originally Posted by Raptorman View Post
I stopped using Bleach when I found out it does not kill anything. All it does to mold and mildew is the same thing it does to your clothes, takes the color out. To kill mold and mildew you need to use a fungicide, or if you want, straight white vinegar(which will kill about 80% of all molds). Don't take my word for it. Take his. And ask any mold remediation specialist.

https://www.normi.org/articles/bleach-mold.php
Thanks for the read it was very informative.

I have been preaching that bleach dose not kill mold since I joined this site...
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Old 07-22-2017, 07:35 AM   #29
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Quote:
Originally Posted by Raptorman View Post
I stopped using Bleach when I found out it does not kill anything. All it does to mold and mildew is the same thing it does to your clothes, takes the color out. To kill mold and mildew you need to use a fungicide, or if you want, straight white vinegar(which will kill about 80% of all molds). Don't take my word for it. Take his. And ask any mold remediation specialist.

https://www.normi.org/articles/bleach-mold.php
I read that whole thing and it didn't say anything about vinegar. Who can afford to spray a whole house down with tea treatment oil.?
Are you affiliated with this organization I'm assuming..
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