Luminous Green Marks on Roof

[Eve]

Anyone have any idea what could cause almost luminous green spodges to appear on someone's roof?

Some some on a house earlier. It was dark (moonlit). Not on any other house in the row, just the one.

Am quite curious as to what could cause it.

[sandyRoe]

The footprints of aliens?

[society]

First thought came to mind is invasion of aliens or visitation from them.

What material is the roof made from?

[DTCwordfan]

County Council marking for a new road to go through...the good news is that it won't probably happen with all the cuts - though it could be the site of your new dump.

[sara3]

here's a thought.. you know that stuff in glowsticks?

it's very messy when sprayed!

[daoji]

luminescent bacteria from urine?
Any copper up there oxidizing?

[tamborine]

distant n'bor has glowing windows from a sunbed. Gotta get the 'noxys' out ;)

[daoji]

Particularly if its old moss covered slates.

[Eve]

Ha, have you been looking at my glowstick photos from last night sis :)

Not sure what's it's made from, just a normal house roof in a normal city street. I think it was one of the ones the council did work on a while back (replacing chimneys etc...).

I thought initially it could be some wierd trick of the moonlight but it's only on the one roof.

Interesting about the road suggestion but logistically there isn't anywhere for a new road to go.

It's more dull lumisescent than bright.

I'm quite intrigued!

[sara3]

lol.. are you sure it's not glowstick stuff? we broke some in a car once, at night.. it was mighty pretty!

[daoji]

Yeah, its alien pee then.

[rowanwitch]

some rare lichen are phosphorescent under the right circumstances....but normally on trees rather than roofs

[AlBags]

Some bird Sugar does that!

[AlBags]

Sugar? lol .. ruddy filter ... $hit!