Power Washing House Bricks

[John Gregory]

My neighbor and I are going to share the rental of a power washer but don't know how powerful of one to get. He has the toughest task; removal of mud stains from around his house. His bricks are antique white (I assume the color and pattern are baked into the bricks and not just a surface coating). After he built his house about seven years ago, he didn't seed right away. The rains kicked up the mud and formed the stain. He used a 2000 lb pressure washer once. It still left a shadow.

Questions: Q1) Is a 3000 lb unit likely to do the job? Q2) is there a chemical he should add?

[Michael A. Ball]

are antique white (I assume the

Danger, Will Robinson, danger!

Consider posting your question on alt.home.repair.

Never assume anything. I'd bet a pizza the bricks are merely coated. {If I'm wrong, I'll even help you eat the pizza.}

As for the shadow that survived the 2K psi, I'd treat it with a bleach solution; keeping it wet for at least 20 minutes. Then rinse.

You can do a lot of damage with 3K psi; so, be careful.

For removal of serious dirt, its hard to beat trisodium phosphate. AKA "TSP".

Jihad Joe--fighting man, from towel to toe.

[John Gregory]