Power Washing Roof Moss

You don t ever power wash a roof.

Power washing roof moss.

But that is normal. Hose off and brush all moss loose from your roof shingles. By comparison a fire hose sprays at 150 to 300 psi. Instead soft washing with a garden hose is least likely to chip dent or crack the tiles or panels.

The noteworthy exception is roofs that have grown algae mold or moss. Start with a medium pressure spray pattern and adjust from there accordingly. Always stand on a dry area of the roof as wet shingles can be very slippery. It can take up to 4 to 6 weeks for the moss to come off the roof.

Carefully place a ladder near the area of moss. The nfrc was established over 120 years ago and in 2012 they issued this statement. The average garden hose sprays water at 40 to 80 psi. Apply a storebought or diy cleaning solution to remove the moss.

Hose off and brush all moss loose from your roof shingles. The power of a pressure washer can damage the shingles on your roof so it s important that you select the proper spray tip. A light sweeping or a rinse with the garden hose is usually sufficient and most roofs don t even need that. We apply a special blend of soaps and let the rain rinse it off.

Power washing takes 5 years off the roof surface. There will be some granule loss under the moss and lichen. Most techniques that we have come across to remove moss are often achieved by violent means such as power washing which may cause damage to the roof especially when combined with unnecessary foot traffic often leading to cracked or broken roof tiles.