Thanks for the info everyone! Mine lives under a big old oak tree and the
top is looking pretty bad after a couple years.

Edward

On Aug 13, 2017 6:35 PM, "Dan N" <dn92610@gmail.com> wrote:

it's OK to use the Karcher pressure washer but it's safer to use the flat
nozzle wand (do not use the cone nozzle wand) and don't get too close to
the roof.