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jmen24 · 04-01-2009, 04:20 PM

Pressure wash from the top down with a mixture of Simple Green (Non-toxic) and Water. Always pressure wash roofs from the top down. If you are concerned about doing this, hire someone that does this all the time, painters are a good place to start. I would refrain from using a brush with anything more than a medium brisle and at that rate you are not removing much. You will remove some of the particles from the shingles and you will void the warranty on your roofing product, remember most roofs come with a 30 year warranty.

Rock salt will also kill everything under your eaves so I would refrain from using.

Apply the zinc strips after your roof is clean, the strips need to be nailed off under the top coarse of shingles as to protect against leaking, do not just nail them on.

The flashing around chimneys is lead and that is why you will not see mold below chimneys.

04-01-2009, 04:20 PM	#18
jmen24 Senior Member Join Date: Feb 2009 Posts: 1,139 Thanks: 223 Thanked 319 Times in 181 Posts	Moss Pressure wash from the top down with a mixture of Simple Green (Non-toxic) and Water. Always pressure wash roofs from the top down. If you are concerned about doing this, hire someone that does this all the time, painters are a good place to start. I would refrain from using a brush with anything more than a medium brisle and at that rate you are not removing much. You will remove some of the particles from the shingles and you will void the warranty on your roofing product, remember most roofs come with a 30 year warranty. Rock salt will also kill everything under your eaves so I would refrain from using. Apply the zinc strips after your roof is clean, the strips need to be nailed off under the top coarse of shingles as to protect against leaking, do not just nail them on. The flashing around chimneys is lead and that is why you will not see mold below chimneys.