Lichen on house

[Deleted member 15266]

Hi trying to get rid of this from our outside house wall. I think it’s lichen and it’s spreading over a large area I tried Wet & Forget which didn’t work. Currently scrubbing with domestic moss killer which is better but very time consuming. Would I be better getting a specialist company in or using the power washer? Was worried the power washer might damage the wall.

 

[blup]

By soaking the wall, pressure washing will surely create the conditions for more moss, and might well damage the brick/pointing. I found out, by chance, the best way to remove moss from a concrete path after tipping soil on it, which removed access to moisture and air, and it just died off, but I'm not sure that is practical for a wall. I would leave it until a really dry spell in summer and then treat and brush it, OR get the hole thing repointed.

Blup

 

[StephenStephen]

If it's lichen, I'd gently suggest you might want be grateful you have clean enough air for it to live, and find something more important to worry about!

 

[Deleted member 15266]

If I don’t need to worry about it I’ll be happy just didn’t want it spreading over the whole house