Building Science & Insulation Calculators
Thermal resistance modeling, series and parallel path framing calculations, and continuous exterior insulation compliance for IECC climate zones.
Building Science🏢
Insulation R-Value & U-Factor Calculator
IECCASHRAE
Build multi-layer wall, roof, and floor assemblies to calculate total R-value (R-total) and overall U-factor with IECC 2021/2024 climate zone compliance checks.
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Building Science🏢
Building Heat Loss & Infiltration Calculator
ASHRAEACCA
Calculate whole-building peak heat loss combining envelope conductive transmission (U * A * Delta T) and blower door air infiltration leakage.
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Building Science Thermal Envelope & Assembly U-Factor Flow
Series thermal resistance (R-values) through cladding, continuous exterior insulation, framing, and drywall.
🧱WeatherExterior CladdingBrick / Siding (R-0.6–0.8)
🛡️Thermal BreakContinuous (ci)Rigid Polyiso (R-5 to R-15)
🪵CavityStud CavityBatt (R-13 to R-21)
📄InteriorGypsum DrywallAir barrier (R-0.45)
📐Total AssemblyAssembly U-FactorU = 1 / R_total
💡 Engineering Note: Continuous exterior insulation eliminates framing thermal bridging, increasing true whole-wall effective R-value by up to 25%.