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Pressure Wash for Concrete - Pretreatment?
Posted on 5/4/24 at 3:30 pm
Posted on 5/4/24 at 3:30 pm
Best way to pretreat concrete before pressure wash?
Is it even necessary or cost effective?
Is it even necessary or cost effective?
6
Posted on 5/4/24 at 3:38 pm to Knucklehead
I never pretreat concrete before I pressure wash.
Posted on 5/4/24 at 3:39 pm to Knucklehead
I think that depends on the pressure washer. If you have something with 3,000psi/3gpm or more then I don't think a pretreatment is going to help. If you are using something electric you're probably going to need the extra help to loosen the grime.
Posted on 5/4/24 at 3:59 pm to Clames
All the pros pretreat with a bleach water mix.
Anything other than that and you are likely to either end up with lines or needing to do it again before long.
Anything other than that and you are likely to either end up with lines or needing to do it again before long.
Posted on 5/5/24 at 9:57 am to Knucklehead
Last time I pre treated with a little dawn and pool chlorine.
Post treated with just pool chlorine.
Mix rate was around 1 cup per gallon of water in a pump sprayer.
To save time I used a 10 gallon pump sprayer hooked up to my lawn mower battery.
No black lines.
Been 2 years and driveway still looks pretty good because there are no lines.
Neighbors had big crew at their house recently.
Didn't pre treat and after it rains it already looks like shite.
Gotta kill that organic material.
Just give the surrounding grass a good soak before applying chlorine.
Post treated with just pool chlorine.
Mix rate was around 1 cup per gallon of water in a pump sprayer.
To save time I used a 10 gallon pump sprayer hooked up to my lawn mower battery.
No black lines.
Been 2 years and driveway still looks pretty good because there are no lines.
Neighbors had big crew at their house recently.
Didn't pre treat and after it rains it already looks like shite.
Gotta kill that organic material.
Just give the surrounding grass a good soak before applying chlorine.
This post was edited on 5/5/24 at 10:01 am
Posted on 5/5/24 at 10:08 am to Knucklehead
My son who washes houses claims bleach will extend the time between cleanings because it delays the regrowth of algae. If algae is not your problem I wouldn’t worry about it.
Posted on 5/6/24 at 11:00 am to Knucklehead
They used jomax on my house. Not sure of that would also be necessary on concrete.
Posted on 5/6/24 at 4:14 pm to Knucklehead
Look for 12% bleach. Check pool supply places. It is a game changer!
Posted on 5/6/24 at 8:43 pm to commode
What water mixture with 12 % bleach?
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