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Replacement Window And Trim Caulking

6 years ago


I am replacing a few windows in my home and am wondering which parts of the exterior to caulk. The replacement windows are vinyl and are being installed in the existing openings. After the windows are installed the existing exterior trim on all 4 sides is being covered with new aluminum trim coil.


The trim coil is being bent to shape around the existing trim so that part of the new trim will overlap the replacement window and also bent to make a return around the trim to slip between the existing trim and the existing vinyl J-channel of the siding.


Should all 4 sides of the vinyl window and aluminum trim interface be caulked? Should all 4 sides of the aluminum trim and vinyl siding interface be caulked?


I appreciate any input. Thanks.

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