dirkthomas
2016-09-27 13:58:57
- #1
Hello everyone,
I have an ETICS facade on KSS. I have now noticed that at high temperatures my aluminum window sills are bending upwards because the facade installer plastered the window sills (they have a simple end cap, unfortunately none with expansion joints) firmly without a gap. The problem is that after a few months, 1-2 of the sills have deformed so much that the slope is lost and after rain the water stands inside (which I only realized after I sealed the gap between the sill and the facade). (see photos).
My question now is, is the fixed, tight plastering of the aluminum window sill (without expansion joint) without an elastic joint (e.g. compressible tape or at least polymer) a defect? To my knowledge, this was often done in the past, but it really should not be state of the art anymore, even though there is no DIN standard for it. And the facade installer was the last trade here, so shouldn’t he at least have raised concerns? Another question would of course be what to do? Tear out all the sills and partially restore the facade? Is there a smaller solution? For example, cut out the facade at the end caps and fill with permanently elastic hybrid polymer and then carefully plaster over? Other ideas? Thanks for all your suggestions!
Best regards
I have an ETICS facade on KSS. I have now noticed that at high temperatures my aluminum window sills are bending upwards because the facade installer plastered the window sills (they have a simple end cap, unfortunately none with expansion joints) firmly without a gap. The problem is that after a few months, 1-2 of the sills have deformed so much that the slope is lost and after rain the water stands inside (which I only realized after I sealed the gap between the sill and the facade). (see photos).
My question now is, is the fixed, tight plastering of the aluminum window sill (without expansion joint) without an elastic joint (e.g. compressible tape or at least polymer) a defect? To my knowledge, this was often done in the past, but it really should not be state of the art anymore, even though there is no DIN standard for it. And the facade installer was the last trade here, so shouldn’t he at least have raised concerns? Another question would of course be what to do? Tear out all the sills and partially restore the facade? Is there a smaller solution? For example, cut out the facade at the end caps and fill with permanently elastic hybrid polymer and then carefully plaster over? Other ideas? Thanks for all your suggestions!
Best regards