Total height 1 10 floor 10 waist line cracks, resulting in floor-to-ceiling windows leaking. Can you cut off the foam layer of the waistline to make it waterproof again?

There should be no foam insulation layer on the waistline, so there is no problem of cutting off the foam layer. Foam insulation layer is generally made on the wall, so there is no need to eradicate wall waterproofing.

If there is an insulation layer on the waist line platform of this floor-to-ceiling window, there is no need to dismantle it. As long as the surface layer of the insulation layer is removed, then the anti-crack protection layer is made again, and the joint between the window and the waist line platform is filled with structural adhesive, it can be done.