green moss growing on wall

orange86

@stuart45 I had the gutters cleaned last year so dont think there should be much dripping, saying that the glutters are many years old.

See pic 2 below, just below the gutter is an overflow pipe, i've water flowing out at times due to f&e tank issue which is now sorted. Previously this water was dripping close to the brick work and that's where i intially saw the algae on the brickwork growing.

@Section62 see pic 3 below, there is a large grey fence and trees above it which overlooks the brick wall on my house.

For now, do you think i should leave the algae growing on the walls?

Section62

orange86 said:

Section62 see pic 3 below, there is a large grey fence and trees above it which overlooks the brick wall on my house.

For now, do you think i should leave the algae growing on the walls?

The trees were what I was expecting to see, and probably the principal cause of the algae growth.

So long as the growing conditions are good, the algae will keep coming back.  So if you go down the chemical route you will likely need to repeat the process.

As I said before, personally I wouldn't go down the chemical route, but do something about having the trees better maintained so more light and air gets to that side of the house.  But if you do use a chemical treatment, follow the standard advice of testing it on a small inconspicuous area first and bear in mind that without scaffolding it will be quite tricky to treat the higher parts of the wall meaning you may end up with a 'tidemark' between the treated and untreated areas.

orange86

Section62 said:

orange86 said:

Section62 see pic 3 below, there is a large grey fence and trees above it which overlooks the brick wall on my house.

For now, do you think i should leave the algae growing on the walls?

The trees were what I was expecting to see, and probably the principal cause of the algae growth.

So long as the growing conditions are good, the algae will keep coming back.  So if you go down the chemical route you will likely need to repeat the process.

As I said before, personally I wouldn't go down the chemical route, but do something about having the trees better maintained so more light and air gets to that side of the house.  But if you do use a chemical treatment, follow the standard advice of testing it on a small inconspicuous area first and bear in mind that without scaffolding it will be quite tricky to treat the higher parts of the wall meaning you may end up with a 'tidemark' between the treated and untreated areas.

The problem is, over the fence these trees are on the neighbours property.

I can apply wet and forget on the ground, however could wait till spring for the wall and see if it gets better on its own.