Will My Egress Window Leak?

Not if it's installed properly. Egress window leaks are almost always a drainage problem in the window well, not a problem with the window itself.

We put at least 12 inches of drainage gravel in the bottom of every well and connect it to a weeping tile or dry-well system, then seal the window flange with waterproof membrane and flashing. That matters more here than in most of the country — Twinsburg's dense glacial clay holds water against the foundation, so a well without real drainage will collect water every spring. Done right, ours stay dry.