Condensation Checker

Check interstitial condensation risk with dew point and temperature gradient visualization — free building physics tool

Related Categories:Building Services

Temperature & Humidity

Indoor

Temperature (°C)

Relative Humidity (%)

Outdoor

Temperature (°C)

Relative Humidity (%)

Indoor Dew Point: 12.0°C

Material Presets

Wall Layers (from interior)

Layer 1

Name

d (mm)

λ (W/m·K)

Air gap

Layer 2

Name

d (mm)

λ (W/m·K)

Air gap

Layer 3

Name

d (mm)

λ (W/m·K)

Air gap

Condensation Check

CONDENSATION RISK

Location(s): After Glass Wool 16K, After Concrete

Temperature Profile vs Dew Point

Position	Temp (°C)	Dew Pt (°C)	Status
Indoor Surface	19.1	12.0	OK
After Plasterboard	18.7	12.0	OK
After Glass Wool 16K	1.1	12.0	RISK
After Concrete	0.3	12.0	RISK

Temperature Distribution

Indoor Surface

19.1°CDP: 12.0°C

After Plasterboard

18.7°CDP: 12.0°C

After Glass Wool 16K

1.1°CDP: 12.0°C

After Concrete

0.3°CDP: 12.0°C

Temp (safe)

Temp (risk)

Dew point

Dew Point Formula

Magnus Formula:

alpha = (17.27 x T) / (237.3 + T) + ln(RH / 100)

Td = (237.3 x alpha) / (17.27 - alpha)

Indoor: T=20°C, RH=60%

Td = 12.00°C