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I need to flash a concrete wall that was poured up against existing siding several decades ago when the street outside was raised 10′. For years Seattle rain has been running down the siding, between the original cedar and more recent concrete wall to come to rest on the sill plate. The basement was also finished so no damage was noticed. After removing the sheet rock and replacing the sills (which were in many places sawdust), some of the exterior sheathing and many of the studs I’m ready to flash the leak! The concrete wall slopes on one side from 3′ above original sill down at an angle of 10-15 degrees. I read lead flashing was easy to use but figure it probably has safety concerns. Any installation or use of materials advise would be greatly appreciated.
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*If your site is on a street in Seattle you could be remiss for placing a source of lead within the reach of children. It is much more toxic for them than adults, and it's not good for us either. I would lean towards copper with a heavy weight sheet, and soldered joints if it gets any traffic. I've used a 30# tarpaper as a sheet flashing between it and any concrete it covers as it will corode when the conditions are right. I'd use tin if was not an issue of style.
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I need to flash a concrete wall that was poured up against existing siding several decades ago when the street outside was raised 10'. For years Seattle rain has been running down the siding, between the original cedar and more recent concrete wall to come to rest on the sill plate. The basement was also finished so no damage was noticed. After removing the sheet rock and replacing the sills (which were in many places sawdust), some of the exterior sheathing and many of the studs I'm ready to flash the leak! The concrete wall slopes on one side from 3' above original sill down at an angle of 10-15 degrees. I read lead flashing was easy to use but figure it probably has safety concerns. Any installation or use of materials advise would be greatly appreciated.