Black stain from shingles on stucco/dryvit

[Wayne G. 14]

Any ideas on how to remove this black stain on stucco/dryvit from asphalt shingles when you can not get up close to it with a wand?

[John Orr 206]

Whatever chem you use to wash gutters. Apply with a soft brush on an extension pole.

[814jeffw 71]

Add some Sodium Hydroxide to the gutter mix if you have trouble.

Jeff

[Wayne G. 14]

Thanks guys - I do not use a specialty chemical to clean gutters. Any recommendations? I have heard that Simple Green works but in some cases has done damage... is this the case?

[John Orr 206]

Add some Sodium Hydroxide to the gutter mix if you have trouble.

Jeff

Before adding Sodium Hydroxide, make sure that the surface has not been painted.

[John Orr 206]

Thanks guys - I do not use a specialty chemical to clean gutters. Any recommendations? I have heard that Simple Green works but in some cases has done damage... is this the case?

Simple Green doesn't cause damage, people do! lol Use the concentrate, but do not dilute.