What retrofit strategies exist to upgrade thermal performance of an existing glass curtain wall without full replacement?

Question

Accepted Answer

Retrofit strategies allow building owners to upgrade outdated curtain walls without full removal. Solutions include installing secondary glazing, replacing old IGUs with low-E coated units, adding external shading fins, and inserting thermal breaks into existing frames. Air-sealing improvements and new sealants also enhance performance. These methods significantly improve U-values and SHGC ratings while minimizing disruption to building operations. Retrofits help older structures meet modern energy codes and reduce operational costs without major structural changes.