Diesel particulates or something stranger !!

[ron]

It's caused by global warming & the only cure is to double taxes.

[Jed Clampit]

The red residue is a form of algae bloom blown around by the wind when it dry's out when it get's wet it will stick and grow you get more of it these day's with warm wet whether not sure if you breath it in if it will make asthma worse but if swallowed it's poisonous

Oh.Wow.I didnt expect that.Its only been the last 5 years or so that its been about but what you say makes sense.Silly question but you dont know the name of the algae by any chance so i can Google it ! Thank you anyway for throwing light on something which has had me puzzled for a number years.

I think it's called Rhodophyta ?

[Jed Clampit]

That info about pink mould also sounds very severe - basically knock your house down if you get it.

My mum moved house a couple of years ago, and this was all over the bathroom grouting.  We just painted neat thick bleach on, with lots of ventilation of course.  No scrubbing, just daub it on.  It vanished within an hour and has never returned.

Total cost - about £1.

How much bleach do you need for your window's and car port 

[bikergraham]

The red residue is a form of algae bloom blown around by the wind when it dry's out when it get's wet it will stick and grow you get more of it these day's with warm wet whether not sure if you breath it in if it will make asthma worse but if swallowed it's poisonous

Oh.Wow.I didnt expect that.Its only been the last 5 years or so that its been about but what you say makes sense.Silly question but you dont know the name of the algae by any chance so i can Google it ! Thank you anyway for throwing light on something which has had me puzzled for a number years.

I think it's called Rhodophyta ?

Thanks Jed.Ive Googled Rhodophyta and it appears its a tropical sea weed,now, i know its gets warm and wet down here in Devon but not quite tropical "yet"anyway.It made interesting reading though.It must be called something else ! Best regards.

[Jed Clampit]

It's definitely Algae put some in a jar of water watch it grow  Day of the Triffids