Power Washing Roof Moss

We apply a special blend of soaps and let the rain rinse it off.

Power washing roof moss.

A light sweeping or a rinse with the garden hose is usually sufficient and most roofs don t even need that. Apply a storebought or diy cleaning solution to remove the moss. By comparison a fire hose sprays at 150 to 300 psi. Hose off and brush all moss loose from your roof shingles.

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. Always stand on a dry area of the roof as wet shingles can be very slippery. Start with a medium pressure spray pattern and adjust from there accordingly. You don t ever power wash a roof.

The power of a pressure washer can damage the shingles on your roof so it s important that you select the proper spray tip. Instead soft washing with a garden hose is least likely to chip dent or crack the tiles or panels. Power washing takes 5 years off the roof surface. But that is normal.

Hose off and brush all moss loose from your roof shingles. Pressure washers use 1 300 to 2 800 pounds per square inch to strip dirt moss and even paint from a surface. The noteworthy exception is roofs that have grown algae mold or moss. The average garden hose sprays water at 40 to 80 psi.

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.