[waynebarry]

Hi There

I need to clean the black marks off a white painted house apex wall, I was going to use a fungicidal spray and then pressure wash it down is this correct or does anyone have any other suggestion on what chemical to use?

Cheers Wayne

p.s I have tried to upload a photo to show you but I am afraid it is saying it is to big.

[Richy L]

yeah, a fungicide and try some TFR.
But painted walls are sometimes stained and need to be repainted.

[waynebarry]

Thankyou Richy, I believe its the prefinished stuff that cannot be paintd the name eludes me! I will give TFR ago as well.

Cheers Wayne

[Blast Away]

Render/stucco.

Some staining eats into it. Here's a small section we did on an apartment block last Sunday. We brushed on some hypo, although there's still some faint stain that won't budge. They considered painting over it!! I told them to see it clean first, now they want a price for all the areas on the buildings.

[Blast Away]

Here's an album of one done with hot wash no chem.

http://www.facebook.com/photo.php?fbid=10150724221883187&set=a.10150724220703187.420215.198312493186&type=1&theater

[Griffus]

Render/stucco.

Some staining eats into it. Here's a small section we did on an apartment block last Sunday. We brushed on some hypo, although there's still some faint stain that won't budge. They considered painting over it!! I told them to see it clean first, now they want a price for all the areas on the buildings.

Looks like the outside of the bin store is probably worse than the inside! 

[waynebarry]

Thans for your reply Blast Away, where would I get Hypo from?

[Richy L]

If you're pressure washing K render be careful not to get to close to it or you will etch out the surface, it will look terrible.
K render needs a soft cleaning approach rather than just high pressure. And stay away from pencil jets!