A Need For Correction

814jeffw

814jeffw

Active member
Ok,..I always try and give the board the best advice from my experiences.
But one thing I know I've miscalculated is the strength of SH that is needed for a typical house wash. I always thought it was around 1%-3% that was hitting the house when DS'ing.
As part of another recent topic I did the bucket test. Until I did the bucket test I just assumed from the effectiveness of my mix that it was in that range. Well,..on another thread I mentioned doing a bucket test with my setup,...and I am at about .5% hitting the house,..and it's working very well,..which is why I thought it was much much stronger than it actually is.

For those who care,..here are my findings with my equipment.
8 GPM
200' of 3/8" hose on a reel
3-5 GPM Hi-Draw
Came up with 17:1
17 parts water to 1 part pure 12.5% would be approximately .7%

But my actual mix bucket consists of 3 gallons 12.5% 2 Gallons H2O and 8 OZ. Elemonator,..So it's actually less than .7%,...It's probably closer to .5% hitting the house.

Probably irrelevant to anyone who has read any of my posts mentioning it,..But,..just wanted to clear it up anyhow.

Jeff
 
814jeffw said:
Ok,..I always try and give the board the best advice from my experiences.
But one thing I know I've miscalculated is the strength of SH that is needed for a typical house wash. I always thought it was around 1%-3% that was hitting the house when DS'ing.
As part of another recent topic I did the bucket test. Until I did the bucket test I just assumed from the effectiveness of my mix that it was in that range. Well,..on another thread I mentioned doing a bucket test with my setup,...and I am at about .5% hitting the house,..and it's working very well,..which is why I thought it was much much stronger than it actually is.

For those who care,..here are my findings with my equipment.
8 GPM
200' of 3/8" hose on a reel
3-5 GPM Hi-Draw
Came up with 17:1
17 parts water to 1 part pure 12.5% would be approximately .7%

But my actual mix bucket consists of 3 gallons 12.5% 2 Gallons H2O and 8 OZ. Elemonator,..So it's actually less than .7%,...It's probably closer to .5% hitting the house.

Probably irrelevant to anyone who has read any of my posts mentioning it,..But,..just wanted to clear it up anyhow.

Jeff
Click to expand...

Jeff- Do you use the same mix for both vinyl & wood siding?
 
Hey Mike,. Painted or stained wood that is just being cleaned,.then yes,..that mix is most likely what I'd use,..maybe bump up the SH a tad.
But,.. If you mean natural wood,.. then the answer would be no,...I would use a mixture of Sodium Hydroxide and Sodium Percarbonate and then neutralized with Oxalic. But I don't run into that here in Central, Pa.

Jeff
 
Jeff
Expand on that sodium hydroxide/sodium percarbonate mix. I've used sodium percarbonate on wood with good results, but haven't added caustic.
We don't have mold issues her in western Colorado though.
Appreciate the effort you put into that test.


Sent from my iPhone using Tapatalk
 
Did you test different soap tips ratio after the gun? Really great thread for this newbie. Thanks man for the idea
 
EricLand said:
Jeff
Expand on that sodium hydroxide/sodium percarbonate mix. I've used sodium percarbonate on wood with good results, but haven't added caustic.
We don't have mold issues her in western Colorado though.
Appreciate the effort you put into that test.


Sent from my iPhone using Tapatalk
Click to expand...

Hey Eric,.It would depend on the severity of the mold and/or dirt on the wood. The hydroxide loosens dirt up better than Sodium Percarbonate alone. Again though, depending on the mold. And you're right,.. on something like a deck that is just gray,... Percarbonate will work fine,..but the addition of 1oz. per gallon of Hydroxide will make it work a tad better. So many variables in this work,.there is no one answer.

Jeff
 
I have only used the X-Jet once or twice every 2 years or so, downstream just about everything and it works good except for the very bad spots where I have to hit them 2 or more times.

Not sure of the ratio as with different brands of injectors, lenght of hose, diameter of hose, etc..... lots of variables will affect the ratio that you pull for applying chemicals but downstreaming has always worked but like I mentioned, once in a while I get out the X-Jet and use it.

Now with Pat's modified X-Jet idea, I might give that a try and see how it works with a regular nozzle because one of the things I don't like about the X-Jet besides moving the chemical container a lot is the spray coming out of the X-Jet seems to be mostly a mist but with the modification it looks to be a tighter pattern.

I have heard many people say that you need 1% hitting the surface but I don't think that any downstream injector can achieve this result unless you had a very small machine and then that kind of limits how high you can spray but I regularly wash houses and buildings with the downstream injector and get great results even though I am sure the % hitting the surface is a lot lower than 1% and that is with either the 8gpm or 5.6gpm machines on the trailer.
 
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