Can I reduce the moss build up on the north side of my roof ?

[kez1]

The roof is concerete tiles.

I have a lot of moss on the north side of the roof where the roof gets less sun.
It eventually rolls off and fills the gutters

Is there anything I can spray, or put on the roof to reduce or stop the moss build up?

 

[cross thread]

I used a product by wet and forget with limited results,next year I will just get up and scrape it off.

 

[SpecialK]

Not really? Vacuum out the gutters every other summer? You can make a DIY pole with some waste fittings...

 

[StephenOak]

I used a product by wet and forget with limited results,

Patio Magic and Wet & Forget are basically dilute forms of benzalkonium chloride. Something like 7 or 8% and you dilute it down to 1 or 2%. I bought a lot of BAC 50, which is a 50% solution of benzalkonium chloride.

I recently did my driveway, see

Moss on driveway, best way to remove?

Hi I was after some adive on what's best to use to remove loss on a tarmac driveway? I've a pressure sprayer which I could use cheap bleach? Bac 50? Patio magic? Any advice? I'd also like to use it on my Indian sandstone slabs.

www.diynot.com

If you kill the moss it may well be light enough to blow away. Also the dead moss is a lot less substantial so it is less likely to block the gutters.