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You can cut it even more than that with great results. There are probably lots of posts like this if you do a quick search.

We typically use about a 8 - 10% mix of SH to water, plus plenty of detergent & surfactant for vinyl. Some cases take a little stronger mix...as demonstrated in these pictures!

For a 80 gl mix i will use 5 gl sh.

sweetwaterfish wrote:

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We typically use about a 8 - 10% mix of SH to water, plus plenty of detergent & surfactant for vinyl. Some cases take a little stronger mix...as demonstrated in these pictures!

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 those are some amazing before and after pics great jbo. I have been cleaning mobile homes almost exclusively for two years and that has to be one of the best I have seen!

If using TSP in that mix, omit it for the housewash, yes?

I have a recipe for 50 gallons that costs me $6.03 to make.  I won't post it and educate my compettition, but if you are a premium member, & you want it, call me.  BTW, I'm paying $2.21/gallon of SH, you may be able to mix it up cheaper.  Beautiful pics Ray.  The closest I've come to that is my new used truck, but I know I'll find it sooner or later. 

I often see in these discussions the mentioning of percentages in house wash mix,.. I think the mix up with the huge differences in percentage numbers is the way it's applied or how someone considers percentage. Some people consider percentage as the of VOLUME of 12.5% in any given container,..where as others consider the actual percentage of hypo in the mix. There are various methods of applying,..premixed, DS,..or x-jet,...
So simply mentioning the percentage of mix HITTING THE SIDING would probably tie these numbers closer together amoung those discussing it.

Jeff

Excellent point, Jeff.

What I take from Jeff's post is not so much about other ingredients, but the possibility of misinterpretation among us regarding the actual percentage of SH itself in the mixes we prescribe.  The final measure would be, as Jeff says, "HITTING THE SIDING" or as applied or "SH>" which could represent at the spray tip. 

It could be a moot point, though, because almost everyone here - including ARMA guideline- reference volume measure of product as it is purchased from the supplier, i.e., a gallon of this and a gallon of that.  Few here who know with cetainty the actual percentage of SH at the spray tip and would be unable to readily measure it.

Am I right on this?

Perhaps we could benefit from a standard legend to do away with the confusion.

SHG could mean per gallon measure, regardless of the strength of SH within that gallon, which is the way we purchase the chemical.

With that "10% SHG" could mean ten percent of your SH mixed with your chemicals.

Jeff has it.  When most of us say 10% SH, we really reference SHGs.   

 

I guess what I'm after here is when you say 10% SH, there is some discussion now and then about whether you mean actual sodium hypochlorite OR the diluted SH that you get when you buy a gallon of it, which would be, in actuality 12.5% SH per gallon.

I know this is convoluted, but that's where the discussion leads, and I think that's what Jeff was talking about.

If you buy 1 gallon of SH and its strength is 10%, you have 90% (water?) in that gallon.

"SHG" if I could use that abbreviation for clarity, would simply mean one gallon of SH at whatever strength you bought it, be it 12.5%, 15%, etc.

When there's a discussion of using 10% SH in a house wash mix, I believe most people would be talking SHGs, not actual sodium hypochlorite.