Originally Posted By: pdacey
This post was automatically imported from our archived forum.
The following pictures are from a one year builder warranty inspection I did today. There are three columns on the front porch. The top two thirds of the columns are painted wood (cedar maybe?) the bottom third is brick veneer.
All three columns have a black growth on them. The client said it just started about a month or two ago. If you notice in the pics, the black is only on the columns and not on the header or the soffit. The header and soffit were fabricated out of cement board (Hardi Plank).
[ Image: http://www.nachi.org/bbsystem/usrimages/1/11.JPG ]
[ Image: http://www.nachi.org/bbsystem/usrimages/2/21.JPG ]
What do you think is causing this? Obviously moisture some how but why not on the header too?
The roof above it is not leaking.
My initial thoughts were:
Maybe the builder didn't use exterior grade paint.
didn't prime the columns before painting.
What say ye......