Structurally Glazed Curtainwall: What Architects Love—and Builders Struggle With

Architects often specify commercial structurally glazed curtainwall systems for tall residential applications to create dramatic expanses of glass. But these systems require far more than just bigger fixed windows. They demand specialized planning, structural integration, and expert installation that most residential window dealers simply aren't equipped for.

Unlike typical residential windows, curtainwall systems require interior steel supports and anchoring designed by a façade or fenestration engineer. The waterproofing strategy is completely different, with large shim spaces planned to accommodate frame movement due to wind deflection, thermal expansion, and contraction.

Another key issue is hurricane testing. Structurally glazed curtainwall may be approved for high-performance use, but often only with limited glass sizes, pressure caps, and exacting installation tolerances. That 5' wide frame might not meet the same criteria as a 4' wide version—changing the whole aesthetic and coordination effort midstream.

The price per square foot is also significantly higher than storefront or large fixed windows—so cost surprises are common when curtainwall is specified without early coordination between the architect, builder, and fenestration consultant.

Structurally glazed curtainwall