Thermal Performance · ISO 6946

Facade
U-Value
Calculator

Build a wall assembly layer by layer. Real-time calculation of R-values, total U-value, and UAE / ASHRAE 90.1 compliance check. Based on ISO 6946 methodology.

ENGINEERING FORMULAE
Rlayer = d (m) / λ (W/m·K)
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Rtotal = Rsi + ΣRlayers + Rse
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U = 1 / Rtotal   (W/m²K)
Rsi = 0.13 · Rse = 0.04 m²K/W
LOAD PRESET:
Wall Assembly
Outside → Inside · Add layers in order
0 LAYERS
External Surface (Rse)
ISO 6946 · Exposed facade
0.04
m²K/W
Internal Surface (Rsi)
ISO 6946 · Horizontal heat flow
0.13
m²K/W
# Material / Layer Thickness (mm) λ (W/m·K) R (m²K/W)
U-Value Result
—
W/m²·K
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R-Value Breakdown
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UAE / Gulf Thermal Reference
ASHRAE 90.1 · Gulf Climate Zone 1 U ≤ 0.70
Dubai Green Building Regs U ≤ 0.57
Abu Dhabi Estidama Pearl U ≤ 0.45
LEED v4 Gulf Baseline U ≤ 0.40
Passive House (reference) U ≤ 0.15