What are these mysterious streaks and discolorizations on this paneling?
January 25, 2015 4:06 AM Subscribe
These are houses in the Denver area. The streaks are new and of unknown origin.
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It looks like mildew in the first picture, but it's curious that this is a new thing in this neighborhood.
Click here
It looks like mildew in the first picture, but it's curious that this is a new thing in this neighborhood.
It's dirt mixed with rain.
posted by Ruthless Bunny at 5:19 AM on January 25, 2015
posted by Ruthless Bunny at 5:19 AM on January 25, 2015
Don't know if there's enough steel being made in Pueblo these days for it to matter, but if you live downwind of a blast furnace, you can sometimes get spectacularly grotty rain that leaves reddish stains everywhere.
posted by scruss at 5:23 AM on January 25, 2015
posted by scruss at 5:23 AM on January 25, 2015
Yeah, it's just dirt and grit, it should just wash off. It seems too dry yo really mildew outside.
posted by stormygrey at 7:38 AM on January 25, 2015
posted by stormygrey at 7:38 AM on January 25, 2015
I dunno, so much of the new construction in Denver is really crappy. I wouldn't be surprised if there is poor drainage or overhang on some of those houses, leading to long-term drops or discoloration like that.
posted by barnone at 12:44 PM on January 25, 2015 [1 favorite]
posted by barnone at 12:44 PM on January 25, 2015 [1 favorite]
It looks like mildew in the first picture, but it's curious that this is a new thing in this neighborhood.
UV radiation in sunlight inhibits mildew, and relative humidity below 62% will kill it. Denver, CO is on semi-arid steppe and it is unlikely to be regularly humid enough to grow mildew outside.
posted by oneirodynia at 3:51 PM on January 25, 2015
UV radiation in sunlight inhibits mildew, and relative humidity below 62% will kill it. Denver, CO is on semi-arid steppe and it is unlikely to be regularly humid enough to grow mildew outside.
posted by oneirodynia at 3:51 PM on January 25, 2015
Has a microbrewer, a winery, a distiller, or a distiller's warehouse established itself upwind of you in the last few years?
Because a little while back, a new sooty fungus was identified streaking the outsides buildings downwind of a distiller's warehouse i8n Canada; the fungus was feeding on ethanol evaporating from barrels of whiskey.
There was a Metafilter thread on it, which is where I found out about it.
posted by jamjam at 4:30 PM on January 25, 2015
Because a little while back, a new sooty fungus was identified streaking the outsides buildings downwind of a distiller's warehouse i8n Canada; the fungus was feeding on ethanol evaporating from barrels of whiskey.
There was a Metafilter thread on it, which is where I found out about it.
posted by jamjam at 4:30 PM on January 25, 2015
i vote for crappy construction - some element of the roof is coloring the rain.
posted by j_curiouser at 8:42 PM on January 25, 2015
posted by j_curiouser at 8:42 PM on January 25, 2015
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Rain water isn't necessarily clean; it can carry anything which was in the air.
posted by Chocolate Pickle at 4:08 AM on January 25, 2015 [2 favorites]