Our house & next door neighbours are about 10 yrs old and have discoloured
"mouldy" stains on the soffits/eaves (?is that right - the white boards
under the roof).

Neighbour got someone to clean them using some special chemical, but I'd
like to do ours myself - any ideas what the chemical is or how toget it?

cheers

In article ,
says...
Our house & next door neighbours are about 10 yrs old and have discoloured
"mouldy" stains on the soffits/eaves (?is that right - the white boards
under the roof).

The eaves is where the tiles end, the vertical bit under that is the
fascia and the horizontal bit between the fascia and the wall is the
soffit.

Neighbour got someone to clean them using some special chemical, but I'd
like to do ours myself - any ideas what the chemical is or how toget it?

Hard to guess without knowing what they're made of and what the finish
is.