Roofing Question for our Resident Roofer!

[Alan R McDaniel Jr]

I did a little shingle work this past week and despite matching the shingles perfectly they are still NEW shingles. The part of the roof that I put them on is heavily stained from what I guess is mold. There are other parts of the roof that are still bright like the new shingles. If I spray a mild clorox solution on the entire roof will it take the mold stains off or will it just bleach the whole thing. Is there any reason why I should not do this?

Thanks in advance.

Alan

[ncboman]

uuhhhh,

tricky problem and question.

Is this the road or 'show side' of the roof?

ncboman

[Alan R McDaniel Jr]

No, it's on the back side, but the front side has plenty of stains too. It's not that noticeable unless you look right at it. The whole repair took two bundles of shingles but part of it can be seen from the back yard. I really don't like getting up there and stomping around too much. I would sooner dig a ditch than work on a roof. No offense but it's just not my cup of tea. Thanks for the reply.

Alan

[ncboman]

to do a really good job of cleaning it, you'll like being up there even less. Gotta be a little more careful when it's wet.

I've seen a roof that has been bleached and powerwashed and it looked good but the official word is not to bleach shingles or pressure wash shingles.

I have a powder I mix with water for cleaning algae from shingles called 'Roof Clean'. It works well and isn't harmful to plants, etc like bleach is. ... but it's not easy to use correctly.

I'll post the exact procedure in a bit.

ncboman

[Alan R McDaniel Jr]

Well I certainly wouldn't power wash the shingles. I'm trying to prolong the life of the roof and washing all the rocks off of the shingles goes against that I think. I thought maybe the bleach would clean up the algae/mold spots without harming the shingles. I spray the brick work with a mild clorox solution to kill algae growing on it. It's not strong enough to hurt any of the plants (at least none of them die from it). I guess in a couple of years they will all look the same anyway.

Alan

[ncboman]

This is a difficult topic for me because ...

1. I doan want to try to provide expert advice on an unseen job.

2. My best answer is untried.

3. An untrained person without fall protection could get seriously hurt or killed doin this stuff.

... and even with fall protection, it's sometimes not what you expect. (http://www.huntstrategies.com/dave/on_or_off.wmv)

:rolleyes:

All that said, on a DRY roof I'd spray the discolored areas with the bleach mixture,

with a mist wand on a water hose keep the area damp without causing runoff for 30 minutes. DO NOT LET IT DRY!!!

and then rinse well with some force. (I use a LOW POWER pressure washer the company bought specificly for cleaning shingle roofs.)

You want to get all of it the first time because the stains become nearly impossible to remove otherwise.

<<<This is all at anyone's own risk and I am only explaining what I MIGHT try if I did not have 'Roof Clean' and my professional equipt and methods.>>>

ncboman

[LampLighter]

ah, nc. I just tried that and fell off the roof. Broke my leg. Please contact the firm of Graham, Young, and Matlock LLC . :D:D:D

[ncboman]

ah, nc. I just tried that and fell off the roof. Broke my leg. Please contact the firm of Graham, Young, and Matlock LLC . :D:D:D

I suggest your lawyers place you in indefinate protected observation (http://www.selh.org/default.aspx) for another failed suicide attempt, lest you sue them too. :D

ncboman

[AK-49]

I did a little shingle work this past week and despite matching the shingles perfectly they are still NEW shingles. The part of the roof that I put them on is heavily stained from what I guess is mold. There are other parts of the roof that are still bright like the new shingles. If I spray a mild clorox solution on the entire roof will it take the mold stains off or will it just bleach the whole thing. Is there any reason why I should not do this?

Thanks in advance.

Alan

my advice... Leave the shingles be as they are...

[Alan R McDaniel Jr]

my advice... Leave the shingles be as they are...


AAAND We have a Winner!!! Ding! Ding! Ding! Ding! Ding! Ding!

Alan

[ncboman]

it's on the back side, but the front side has plenty of stains too.

I wouldn't have such mess as that myself. :D

ncboman