"Vic Smith" wrote in message
...
On Fri, 05 Aug 2011 15:04:37 -0400, Metspitzer
wrote:

I want to get my house pressure washed and I am reading that I should
not because I have white brick. It has been pressure washed before.

Anyone care to chime in?

Depends on how the bricks were fired.

If they are truly white bricks they were never fired. If they are the
1960-70s white bricks, I recall they were referred to as "sand-lime" bricks,
a concrete type of brick, often deteriorating by now. My father had his
house built with them in 1967, and learned when some black mortar was acid
washed off them that they stained. Never acid wash them, if you pressure
wash them, keep the pressure low and use a wide angle nozzle. They can be
damaged very easily, especially at this age.