If the frame is damaged (vinyl warp, wood rot, aluminum corrosion), replacing only the glass is impractical. Full replacement yields new frame, seal, and warranty.
$600–$1,200 per window installed (vinyl double-pane, standard size). 5. Step-by-Step DIY IGU Replacement (Detailed) | Step | Action | Tool/Material | |-------|--------|----------------| | 1 | Remove sash (if operable) | Screwdriver, pry bar | | 2 | Take out glass stops (carefully – they break easily) | Stiff putty knife, rubber mallet | | 3 | Measure IGU thickness, width, height – order replacement | Tape measure, glass shop order form | | 4 | Clean frame channel of old sealant | Utility knife, denatured alcohol | | 5 | Apply new sealant (butyl tape or silicone) | Caulk gun or tape roll | | 6 | Place setting blocks in bottom channel | Rubber or plastic shims | | 7 | Set new IGU into frame | Suction cups (helpful for large units) | | 8 | Reinstall stops/beads | Finish nails (wood), snap-in (vinyl) | | 9 | Reinstall sash | Screwdriver, hinge pins | how to fix a double pane window seal