Rust Stain on Asphalt Shingles

Posted by on May 5, 2008, 10:04 am

Does anybody know how to remove rust stains from asphalt shingles? I
have to vents that have left rust streaks running all the way down the
roof to the gutters. I have light gray shingles.

Posted by ransley on May 5, 2008, 10:24 am

On May 5, 9:04=A0am, powers...@msn.com wrote:

> Does anybody know how to remove rust stains from asphalt shingles? =A0I
> have to vents that have left rust streaks running all the way down the
> roof to the gutters. =A0I have light gray shingles.

An acid cleaner like CLR might work, I dont know if it will damage
shingles.

Posted by pipedown on May 5, 2008, 7:26 pm

> Does anybody know how to remove rust stains from asphalt shingles? I
> have to vents that have left rust streaks running all the way down the
> roof to the gutters. I have light gray shingles.

Stop the source of the rust perhaps by painting or replacing the nails (with
copper) and the stains will fade in a year or two. The rust stain is just
particles trapped on the shingle surface not actual rusting of the shingle
so a rust cleaner like CLR will have limited effect (except by virtue of the
soap it also contains). Plain old dish soap and a garden hose would be how
I would start. Don't spray too hard or the grit will come off too much and
you'll wish you had left it alone.

Posted by Boden on May 5, 2008, 8:00 pm

pipedown wrote:

>>Does anybody know how to remove rust stains from asphalt shingles? I
>>have to vents that have left rust streaks running all the way down the
>>roof to the gutters. I have light gray shingles.

>
>
> Stop the source of the rust perhaps by painting or replacing the nails (with
> copper) and the stains will fade in a year or two. The rust stain is just
> particles trapped on the shingle surface not actual rusting of the shingle
> so a rust cleaner like CLR will have limited effect (except by virtue of the
> soap it also contains). Plain old dish soap and a garden hose would be how
> I would start. Don't spray too hard or the grit will come off too much and
> you'll wish you had left it alone.
>
>

You can remove the rust stains easily with oxalic acid. But, first you
must eliminte the source of the rust or they will re-occur.

Posted by on May 5, 2008, 11:46 pm

> pipedown wrote:

> >>Does anybody know how to remove rust stains from asphalt shingles? =A0I
> >>have to vents that have left rust streaks running all the way down the
> >>roof to the gutters. =A0I have light gray shingles.

> > Stop the source of the rust perhaps by painting or replacing the nails (=

with

> > copper) and the stains will fade in a year or two. =A0The rust stain is =

just

> > particles trapped on the shingle surface not actual rusting of the shing=

> > so a rust cleaner like CLR will have limited effect (except by virtue of=

the

> > soap it also contains). =A0Plain old dish soap and a garden hose would b=

e how

> > I would start. =A0Don't spray too hard or the grit will come off too muc=

h and

> > you'll wish you had left it alone.

> You can remove the rust stains easily with oxalic acid. =A0But, first you
> must eliminte the source of the rust or they will re-occur.- Hide quoted t=

ext -

> - Show quoted text -

Thanks for the advice. I have already taken care of the rust with
some black rustoleum. Where can I buy some oxalic acid?

Similar Threads	Posted
Tub Rust Like Stain	November 15, 2007, 3:51 pm
Removing rust from brick/shingles	November 25, 2006, 9:43 am
protecting asphalt roof shingles	June 13, 2008, 3:38 pm
How do I remove rust stain from marble???	June 1, 2006, 12:02 pm
Re-Roofing a Tar & Gravel roof with Asphalt Shingles	November 2, 2005, 6:52 pm
asphalt shingles blown off in wind storm	December 5, 2007, 12:02 am
Asphalt Shingles For New England House: Appropriate Weight Or Thickness Recommendations ?	February 3, 2007, 9:16 am
Deck stain - Behr Semi-Transparent Stain with Nanoguard	July 27, 2007, 10:38 am
Does Rust Breed Rust?	October 11, 2008, 8:40 am
New deck - to stain or not to stain?	August 31, 2008, 11:51 am