ok, i've got a house with both vinyl siding
and brick (real bricks) exterior.

a apparently reputable (in business over 10+ yrs)
company has offered to wash the exterior with
a hot water/low pressure power wash.

doing some reading on the web, it's a mixed
assortment of opinions regarding the long term
implications of using pressurized water streams
to clean vinyl siding.

one camp says there's nothing wrong with it as
long as you're not spraying up under the siding
panels.

other camp, says don't do it - period.

also my concern was how fragile is brick to
hot water/low pressure/mild cleaning fluid -
spray streams ?

of course all the power wash websites will claim
(as does this particular business), that they've
done hundreds/thousands of homes with no complaints.

but you can't tell hidden moisture/mold damage
when it's covered behind siding (or between a
brick exterior and a Tyvek covered plywood panel).

any thoughts/opinions ?