Most windows sold in the U.S. are still double-pane, while triple-pane glazing has been the European default for years. In a marine climate like Seattle’s — mild but persistently damp and drafty — the extra pane and gas fill reduce heat loss through the glass and cut down on cold-spot condensation near the frame.
We’ll go deeper on U-values, argon vs. krypton fill, and where the payback point actually lands once real content replaces this placeholder.