Replacement Windows

Discover expert guides on replacement windows, vinyl frames, double-hung, and Low-E glass to plan, size, frame, flash, and install energy efficient windows

A steel tape measure stretched across the inside of an old white double-hung window with a notepad on the sill

ExteriorReplacement Windows8 min read

Measure for Replacement Windows the Way Installers Do

A step-by-step guide to measuring for pocket replacement windows: three-point width and height, checking square and sill slope, deductions, and writing a clean order.

A new white vinyl insert window being set into an old wood frame with shims and a level on the sill

ExteriorReplacement Windows11 min read

Install an Insert Replacement Window That Stays Square for Decades

A step-by-step guide to installing an insert replacement window: stripping the old sash, setting it square, shimming, foaming, and refitting stops.