Replies

1. 
   seeyou | Jan 19, 2006 05:48pm | #1

   I've used a whole lot of it - hope there's no problem. Usually the contact is minimal.

   Birth, school, work, death.....................

   http://grantlogan.net/

1. 
   MarkH | Jan 19, 2006 05:56pm | #2

   The window heads were originally copper flashed on this house, then the siding was torn off and replaced with masonite reusing the old flashing. The siding is turnning to compost very quickly, while the old flashing is still good, so I was thinking of using copper once again, but didn't know how it would react with the hardi.

1. 
   seeyou | Jan 19, 2006 07:54pm | #3

   I've been doing it for 10+ years and haven't seen any problem. Shouldn't be a problem if the Hardie is pre-primed where it touches the copper.Birth, school, work, death.....................

   http://grantlogan.net/

1. 
   davidmeiland | Jan 19, 2006 08:23pm | #4

   If you want to go all out, stick Vycor to the back of the copper.

2. 
   WayneL5 | Jan 20, 2006 05:24am | #5

   Definitely yes.  I used it on my home, and it's commonly marketed for and used with masonry on commercial work.  I've uncovered flashing installed against cement block in 1966, it was good as new.

   The photo shows copper flashing atop the foundation stone.

3. 
   john_carroll | Jan 20, 2006 04:44pm | #6

   Copper is very compatible with portland cement products. You can set copper directly in curing concrete or wet mortar. In FHB #136, I describe how I embed copper counter flashing in the mortar as I lay the bricks. Wet portland cement products corrode aluminum but you can install aluminum against cured concrete or mortar without a problem. For a wealth of information on copper, check out the Copper Development Association: http://www.copper.org

1. 
   MarkH | Jan 20, 2006 05:35pm | #7

   Copper it is then. Surprised the Hardi website does not mention copper, it only says do not use aluminum.