Understand the versatility and limitations of their service, whether it's suitable for driveways, decks, siding, fences, etc. 2. **What type of equipment and cleaning agents do you use in your power washing service?

Understand the versatility and limitations of their service, whether it's suitable for driveways, decks, siding, fences, etc. 2. **What type of equipment and cleaning agents do you use in your power washing service?