To with ease clean a deck, a force washer with a PSI differ of 2500 to 3000 is ideal

https://wiki-dale.win/index.php/Understanding_Pressure_Washer_Efficiency:_How_Many_Gallons_Per_Minute_Do_You_Really_Need%3F_70101

To easily easy a deck, a drive washing machine with a PSI number of 2500 to 3000 is perfect. This rigidity point successfully eliminates dust, dust, and mildew with no harmful the timber