Table 3 Original building envelope structure.

From: Parametric analysis of passive ultra-low energy building envelope performance in existing residential buildings

Component

Area

Structural composition (from interior to exterior)

U-value [W/(m2·K)]

SHGC

Exterior walls

1123.34 m2

20 mm cement mortar + 240 mm perforated clay brick + 20 mm plaster mortar + 20 mm cement mortar

0.949

–

Roof

283.967 m2

100 mm reinforced concrete + 20 mm lime-cement mortar + 35 mm extruded polystyrene (XPS) board + 30 mm cement mortar

0.85

–

Windows

378.135 m2

Thermal break aluminum alloy window with single-layer insulating glass (5 mm + 9 mm air gap + 5 mm)

3.0

0.67

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