it seems that when someone has a leak in there ICF house the brickledge is usually or one of the culprits.

what i would like to know is why to they leak, and how to flash them so when i build ICF houses
I don't have a leaky brickledge.
I am also asking for others that read this forum.

Rdcurtis, I sometimes oversimplify but your brickledge should ALWAYS be well below your finished floor -- perhaps a few inches or more -- and therefore can not leak. Perhaps you are talking about below grade? Forgive me - we don't do that much in Texas. Regards.

Hello RD. Brick is a porous weather barrier so moisture can easily get behind the brick. Here it will run down the brick (usually) and sometimes the ICF wall if there is severe moisture penetration. Water running down the ICF will very largely do just that, run down the wall. If however there is any sort of impediment (dam) to this free flow, AND if there is a crack or joint in the ICF at this point, AND if there is a crack or void through the concrete core, water may go through there to the second ICF foam wall, through which it might also find its way. Basically there have to be a series of circumstances for water to reach any part of the structure which can be damaged by water. But okay, the leak-in-the-wall stars are in alignment and you live under them; Waterproof your wall down to, and over, a flashing on which you have laid your brick (with weep holes). Less drastic: at the bottom of the wall install the above mentioned flashing into a reglet in the ICF foam, and impress upon your masons your concerns and make certain they maintain the (normal) one inch gap between ICF wall and the brick veneer. Based on never having heard of a water leak "through a brick ledge" in 18+ years of ICF construction I think the less drastic route will serve you. If this is really a major concern, use a "healable" waterproofing such as bituthene and do your whole wall. FM

The ledge should be flashed.  See http://www.copper.org/Applications/...shing.html.  While they don't show the exact detail with ICF, the detail would be similar to the one shown in D. Brick Veneer on CMU at Grade or in L. Brick Veneer on Wood Studs at Grade.  Make sure they include the weep holes when they install the brick.

Extending the peel and stick membrane about 6'' over the brick ledge ussually does it for us.
Most times it's the window that gives trouble.