Retrotec USACE User Manual

Page 141

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Appendix D D11

D.1.4 Windows

D.1.4.1 Single-Pane Windows with Frames Having No Thermal
Breaks (Waste)

Figure D17. Examples of single-pane windows with metal frames that create thermal ridges.

Single-pane windows result in excessive heat losses and gains due to the overall
windows low R-value. Such clear-glass windows offer no solar heat gain pro-
tection. Original aluminum or metal framed windows have no thermal break,