Building Material Library
The Building material library contains hygroscopic and thermal properties for materials used with the Heat Transfer Module’s Moisture Transport interface and Heat and Moisture Transport multiphysics interface.
In addition to thermal properties (thermal conductivity, density, and heat capacity), the following hygroscopic properties are provided:
•
Effective thermal conductivity (SI Unit: W/(m·K))
•
Moisture content (SI Unit: kg/m
3
)
•
Moisture diffusivity (SI Unit: m
2
/s)
•
Vapor resistance factor (dimensionless)
•
Vapor permeability (SI Unit: s)
Note that for materials intended to be used as vapor barriers, only the vapor resistance factor and vapor permeability are available.
The properties are given either as a constant value, as a piecewise linear function of the temperature or the relative humidity, or as a polynomial approximation function of the temperature or the relative humidity that provides a good agreement with the reference. The table below summarize the materials, their characteristics and their intended use. Also see
References for the Building Materials Library
.
Material
Usage
Characteristics
Reference
Concrete
Building structure
-
Ref. 3
Lime silica brick
Building structure
-
Ref. 3
Wood, pine
Studs, panels
Nominal thickness = 10 mm
Ref. 1
,
Ref. 2
Gypsum board
Interior board
Nominal thickness = 13 mm
Ref. 1
,
Ref. 2
Glass wool board
Sheathing
Nominal thickness = 30 mm
Ref. 1
,
Ref. 2
Cellulose board
Sheathing
Nominal thickness = 25 mm
Ref. 1
,
Ref. 2
Glass wool batt
Thermal insulation
Nominal thickness = 50 mm
Ref. 1
,
Ref. 2
Cellulose batt
Thermal insulation
Nominal thickness = 50 mm
Ref. 1
,
Ref. 2
Cellulose (loose)
Thermal insulation
Nominal thickness = 50 mm
Ref. 1
,
Ref. 2
Plastic coated paper
Vapor/air barrier
-
Ref. 1
,
Ref. 2
Expanded polystyrene board (EPS)
Thermal insulation, vapor/air barrier
Board from molded blocks conform to norm EN 13163
Ref. 4
Extruded polystyrene board (XPS)
Thermal insulation, vapor/air barrier
Board of thickness < 60mm, without any occluded gas other than air and CO2, conform to norm EN 13164
Ref. 4