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Old 06-07-2012, 03:31 PM  
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Default How to repair Masonary/Brick Window Sill

I need some help with the best way to repair this window sill. I honestly can't tell what, other than mortor, held the ledge to the wall.

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Old 06-08-2012, 05:47 AM  
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To do a job like this the top course of brickwork should have been headers overhanging the brick face, and the cill formed by rendering the headers. I would take the cill off and replace the stretcher course with headers and re form the cill.
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Old 06-08-2012, 03:28 PM  
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It almost looks like it could have been cast-in-place concrete, with a thin portion of it resting on the brickwork while the rest cantilevered out over the bricks. If everything showing is sound and tightly attached, I'd be strongly tempted to simply take the original chunk of sill and re-attach it, using a healthy layer of low-modulus epoxy gel. Make sure the bonding surfaces are squeaky-clean, and support the sill from below while the epoxy sets. A few dabs of matching stucco over the visible epoxy bonding lines (after roughening them up with a grinder) will make it as good as new.
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