Can power washing damage a wood deck?

Yes, power washing can damage a wood deck if done improperly. High pressure can gouge, splinter, or strip too much wood from the surface. To avoid damage:

1. Use a pressure washer with a PSI of 500-1200, suitable for softwood.
2. Use a fan-tip nozzle to spread the water pressure evenly.
3. Always work along the grain of the wood to minimize damage.
4. Roof Soft Washing: Use a biodegradable cleaning solution with algaecides (like sodium hypochlorite mixed with water) to kill moss and algae without harming the roofing material.