Washing of a commercial building can be as small as a restaurant or as large as a 6 story hotel and everything in between. No mater the size they all have a few  things in common which is dirt, mold, mildew, spider webs and general funk that accumulates over time.  Buildings can be built with materials such as stucco, brick, hardy board or even vinyl all which needs different methods to safely clean each type.   Stucco or dryvit which is a mixture of sand, cement, lime and water it is a soft surface  needs to have low pressure to not scar the surface. Vinyl is used in many apartment complexes and can take a bit more pressure to rinse after applying a good quality soap.Brick is a more expensive medium to build with and you see at the nicer buildings but can take the most pressure after a good soap is used. No mater what your building is made of trust TLC Pressure Washing for all you building washing needs.