Find the U-value of a wall, roof, floor or window. Build it up layer by layer from a material library, with air gaps, battens and surface resistances to ISO 6946, or pick the glass, frame and spacer of a window to ISO 10077-1. It also checks for interstitial condensation between the layers with the Glaser method of ISO 13788, at your design conditions and month by month over a year.
Use the glass and frame figures from the manufacturer's data sheet when you have them; the presets are typical values.
Wall U-value
– W/m²·K
Section and temperatures
Design conditions
City not listed? Look up its station at ashrae-meteo.info and type the values below.
Interstitial condensation Glaser method, ISO 13788
Month by month ISO 13788, condensation and drying over a year