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sweetwaterfish wrote:

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8-10% is perfect for vinyl. You may need a pump up sprayer with 15% for real problem areas. No need to tarp at 10%, just rinse before and after.

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Baltimore MD Roof Cleaning 410-482-4367 wrote:

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Strange everyone here must have stale SH 5 gallons in a 50 mix kills all the plants here we use 2 gallons in a 50 mix and it cleans great.

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 I agree.  10% of a 12.5% SH cocentration????? Wow thats a lot.  You will burn up grass and shrubs with that much - unless its really weak like Bill said.

We use about 2 gals of 12.5% per 100 gallon batch (plus detergent). Thats like 4 gals of regular bleach, which would be a 3-4% solution, which is all you need for green on vinyl....

Unless you watered like CRAZY, or there were no shrubs/grass, you may likely have burn problems in a week or so.....

bnkeenan wrote:

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Baltimore MD Roof Cleaning 410-482-4367 wrote:

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Strange everyone here must have stale SH 5 gallons in a 50 mix kills all the plants here we use 2 gallons in a 50 mix and it cleans great.

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 I agree.  10% of a 12.5% SH cocentration????? Wow thats a lot.  You will burn up grass and shrubs with that much - unless its really weak like Bill said.

We use about 2 gals of 12.5% per 100 gallon batch (plus detergent). Thats like 4 gals of regular bleach, which would be a 3-4% solution, which is all you need for green on vinyl....

Unless you watered like CRAZY, or there were no shrubs/grass, you may likely have burn problems in a week or so.....

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 Nah...you guys just have sissy moss,mold & mildew. Ours down here is the real deal!

Confident Roof Cleaning Houston TX wrote:

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Looks great!!

We use a roof mix for houses. Works great!!

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 Us too Scott   All you have to do is simply WET the side of the house down first, then spray your mix. Presto, instant Dilution

Soffits can be a problem when soft washing IF too big a nozzle is used. Our quick change spray nozzles allow us to throttle down when cleaning soffits by going to almost a mist nozzle.

There  has been a lot of 'attention' given lately to the non pressure cleaning of houses called Soft Washing, or softwashing. We have cleaned thousands of houses this way, just never made a big deal out of it. There was always much more money in doing roofs. I can do 2 roofs in the time it takes to softwash a house with screen room. But as competition has increased in the roof cleaning business, it has forced us to get more money from fewer customers. Seldom a day goes by now that we don't do any softwashing. It was stuff I used to farm out before, or just do to make our customers happy.

VA Roof Washer wrote:

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We used a 10% SH mix.  It turned out great.  One concern is wether it was to strong of a mix.  I really watered down the plants before, during and after but I always wondered if I was using to much SH.  Do you need to tarp the shrubs?

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All of my pressure washing machine chemical injectors put out more than 10% and other than flower petals 10-15% is not going to damage any plant, as long as you water before and after.