Protecting roof from moss

yes probably know as flash band(ing) I don't think I've ever been in a shed that doesn't have it. How ever the metal face might not be zinc...

Donno, I thought the traditional roof moss repellent was copper. A wire fixed below the ridge tiles.

Copper certainly does. A thin copper wire stretched across a roof will prevent any moss growing down the slope from it. It might take a year or more to start becoming effective if you already have a large moss growth there.

There is a moss inhibitor paint that Thatcher's use around the stonework to thatch join, but I don't recall a name or maker for it. Maybe a web search will bring something up.

The only stuff I've seen in the sheds has had a very thin lead face ... (the flash band I mean, not the staff - although ......)

Don't know about zinc ... but it is true. for copper ....

In my last house the non-sunny side of the roof suffer major moss problems, leading to blocked gutters and even other plants moving in eg grass. I place a "run" of 2.5mm copper core from some old electrical flex across the uppermost tiles after reading somewhere about moss and lichen not liking copper. Possibly made a slight difference on the tiles the wire ran across but within a year or two moss was back across the whole of the roof.

I ended up just sweeping the piles of moss off every couple of years.

we have a large conservatory roof (3mx6m) triple glazed plastic fairly shallow slope which after a year had a green tinge and then grew algae I used to have to wash it off every 3 months during the summer then I had a bright idea In the garage I had the remains of a container of mould inhibitor it was the type you put on walls before masonary painting them it was Sandtex - so I sloshed some diluted stuff on and let it run down the roof - no green growth for two years !

the Homebase brand one seems as effective

I suspect it will kill roof moss as well

Thanks Jim - good thought, fine for your conservatory but not very practical for the roof of the house - especially given my distaste for heights and wobbly ladders!

Yes it was a bit of an aside as I could just throw a couple of buckets of stuff from an upstairs window but given still day and a long lance spraygun or an ordinary one and and some timber it depends on how bad your fear of heights is