Does your house need repainting? Maybe a pressure wash will do instead. Whether such a wash will clean things up suitably or is used just as a first step in surface preparation for painting, you must be careful to avoid damage. If it can etch concrete, it surely can blast wood or vinyl. Spray nozzle tips are sized in degrees, with zero being most powerful. So, start from the highest number and work down -- being careful to spray downward, especially on siding and flashing. This avoids lifting and driving water underneath (not to mention possibly blasting things off). Make sure all windows and doors are closed tight. And that's the On The House tip for today.