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2cptv2

06:02AM | 12/11/06
Member Since: 12/10/06
2 lifetime posts
Bvroofing
I have black raised dots on my white cedar shingles that have semi-transparent stain on them. They're only 3 years old.

I'm having a hard time removing the dots.

I've tried bleach as well as other products but nothing works unless I sand it down to the bare wood. Even after sanding you can see little black stains in the wood.

Also when it rains my shingles turn black.

I do have Tyvec behind the shingles and put two coats of stain on them.

Help?

fugazi48

06:14AM | 12/11/06
Member Since: 03/08/06
192 lifetime posts
is this on all of the shingles? Tree sap will leave dots like that. I get them on VW. A pain to clean up. Also, flies like to leave dots like that. I used to have to clean up that mess when I worked fast food. yuk


2cptv2

08:37AM | 12/11/06
Member Since: 12/10/06
2 lifetime posts
yes it is on all sides of the house with

no trees.

I've been told that the cedar mulch will give you black mold spores on your siding which I believe that's what I have.

My question to the bloggers are how do I get rid of these mold spores on the cedar.

I've tried bleach and other products but nothing works unless I start sanding.

I put semi-transparent stain with a mold kill treatment in it on new shingles and I

haven't seen any spores on this new wall.

I need to get rid of the stuff I have on the other walls that have the spores.

Also can I restain in the winter?

Thanks

Piffin

04:45AM | 12/25/06
Member Since: 11/06/02
1281 lifetime posts
I htink this is mildew, plain and simple. The reson it seems to keep coming back and is hard to remove is that it is growing from the inside ofthe shingle out, from under the stain.

When I am looking for a stained shingle finish, I buy predipped product. That way it comes dry and with the stain sealing the cedar shingles onm both sides. It sounds like your shingles were already damp when the stain was applied, locking the moisture in to feed the mildew spores, which are everywhere.

There may be some sort of fungicide spray you can apply similar to what was mixed in the newer stain you used. Check at a garden center or hardware sore

Excellence is its own reward!


5slb6

02:00PM | 01/12/07
Member Since: 07/28/02
1356 lifetime posts
If you have hardwood mulch around your house then you have artillary fungus (do a google search) on your siding.
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