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Old 02-02-2009, 10:53 PM   #1
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Pressure washing siding


Do I need to add any detergent to the siding prior to pressure washing? I have been reading that bleach or TSP can be used. If so, what are the dilution ratios.
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Old 02-03-2009, 05:30 AM   #2
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Pressure washing siding


Read the box of the TSP..Not allowed in some areas but most common to use. Rinse siding first. Do not use bleach. The pressure washer will add the soap mix to your washer automatically with a small inlet tube that comes with the system. I use a powered brush with this step. After scrubbing the siding, rinse again. Cover plants with plastic to avoid detergents harming the leaves.
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Old 02-03-2009, 07:05 AM   #3
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Pressure washing siding


you can find pre mixed house wash at the HD
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Old 02-03-2009, 08:24 AM   #4
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Pressure washing siding


No, it will be in a concentrate. But if you use the tube as the pressure washer is designed to do, it will mix with the water. Just place the tube in the house wash. Home Depot has this. They also have some that attaches to your hose, which will also work. The chemical will loosen the dirt and the pressure washer will remove it.
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Old 02-03-2009, 08:49 AM   #5
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yes your right Bob i meant the chemical was mixed but they are concentrated thanks for correcting me also they are biodegradable
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Old 02-03-2009, 09:21 AM   #6
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Pressure washing siding


Not sure, you need to read the package. I know that the TSP I use is not. But if you cannot find any then you can still use a laundry detergent that can be found in the biodegradable mix. Most dirt sticks to the house from the oils released from cars. Or mold and mildew. The oil residue is what you want to bind to chemically to remove it. (hot water helps a lot also). So most if not all biodegradable products will not work as well. But the pressure washer will still remove most of it, just takes longer. Cleaning is an economy of chemical + heat + time + agitation. So removing one requires increasing the other(s) to compensate. Chemicals react better with heat, so less chemical can be used with more heat. You are limited to the agitation since you do not want to damage the siding with too high a pressure. I use a turbo washer head that is idea for this type of cleaning.
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Old 02-03-2009, 10:35 AM   #7
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Pressure washing siding


your kind of right about the oil but most of the dirt atleast on vinyl or aluminum is caused by a static charge and i would be very careful using hot water on any vinyl siding .i would use the pressure washer to wet the area and apply chemical if needed then use a soft brisle brush like a car wash brush and gently scrub an area at a time.And rinse very well also becareful not to spray water up into your soffit vents
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Old 02-03-2009, 11:13 AM   #8
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Pressure washing siding


How hot do you think is coming from a tap... sure will not hurt vinyl siding. And cleaners are available for vinyl siding, but he did not say this was the siding he has.
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Old 02-03-2009, 01:00 PM   #9
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could be pretty hot point is you dont need hot water to wash your house vinyl or otherwise
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Old 02-03-2009, 01:07 PM   #10
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Pressure washing siding


I agree, just posting basic scientific cleaning info.. Not sure what he is cleaning or trying to clean off here. Years ago I went to school for cleaning and you learn some good stuff. But I go to school for everything for 35 years now, somewhat addicted to it. Reading all these posts to learn even more. Hot water is not needed, but for tough cleaning it will help
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Old 02-03-2009, 01:22 PM   #11
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you are very knowledgeable Bob its obviousand its was great to discuss this with you here
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Old 02-04-2009, 05:33 PM   #12
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Pressure washing siding


A bleach and TSP mix is recommended by many manufacturers
The recipe is on the box of TSP
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