- “Partially pressure-washed flagstone pathway” by SB_Johnny, CC BY-SA 3.0, via Wikimedia Commons
- “Fotos produzidas pelo Senado” by Edilson Rodrigues / Agência Senado (Senado Federal), CC BY 2.0, via Flickr
- “Pressure Wash” by Mark Schellhase, CC BY-SA 3.0, via Wikimedia Commons
- “Paint chalking” by GRALISTAIR, CC BY-SA 4.0, via Wikimedia Commons
- “Low Pressure Roof Cleaning” by S.Buckalew, CC BY-SA 3.0, via Wikimedia Commons
- “Metal Roof Cleaning” by Stormsinger54, CC BY-SA 4.0, via Wikimedia Commons
- “Gloeocapsa Magma on Shingles” by Mcbooz, CC BY-SA 3.0, via Wikimedia Commons
- “A gardener is watering the green grass” by Shixart1985, CC BY 2.0, via Wikimedia Commons
- “Dornbirn-Photovoltaic module cleaning-02ASD” by Asurnipal, CC BY-SA 4.0, via Wikimedia Commons