Once you have identified the type of material beneath the paint you can measure the pressure accordingly to make sure it removes the paint but keeps the siding intact.
Pressure wash loose paint from siding.
Attach the 15 or 25 degree nozzle to the wand for general paint cleaning then test the effect on the siding photo 6.
Your pressure washer s instructions will indicate the proper settings for applying the cleaning solution.
Oil based paint will require higher pressure than latex house paint.
Learn how to give your pressure washer a tune up.
Starting low and gently working your way up is the safest bet.
It requires a lot of pressure to break the chemical bond between the surface and the paint.
Fill up your pressure washer s tank with cleaning solution then spray the siding with the water solution mixture working from the bottom up.
Pressure washing will easily chip paint off of most surfaces so only use a low pressure flow of water to wash painted items such as a porch floor or painted outdoor furniture.
Bob vila interviews a contractor in the process of using a pressure washer to remove paint from exterior wood siding.
Never start off on the highest pressure setting.
Pressure washers usually have three or four nozzles with spray patterns of varying widths.
Based on our experience we recommend getting a pressure washer with at least 3000 psi.
The force of water from a power washer removes loose paint dirt and mildew in a single pass and leaves the siding slightly deglossed and ready for repainting.
The pressure you use also depends on the type of paint you are removing.
Use a low pressure and wide sprayer angle while applying the cleaning solution.
The spray should clean away all dirt and chalk without damaging the siding.
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Never use this method on hardboard siding as it s more susceptible to moisture and can easily be damaged by the high pressure.
They often succeed and then that 3000 psi water is blasting right into bare wood.
When pressure washing a lot of painters will get right up close to the surface to try to blast loose paint off.