Build a reusable multi-layer build-up from materials in the Library.
A construction is a build-up — an exterior wall, a floor deck, a roof — assembled from Library materials with a thickness or quantity for each layer. Once saved it behaves like any other Library entry: you map a model element to the whole build-up in one drop instead of layer by layer.Open New → Construction from the Library toolbar.
Search the Library on the right and drag a material into the drop zone. Layers are added one at a time, in any order.
The drop zone
A material with no lifetime cannot be added until one is set — the app asks for it there and then, with Lifetime table for the reference values. See Missing properties.
Every material you drop in opens Adjust dimensions, where you say how much of it goes into one declared unit of the construction. The 3D preview updates as you type, so a wrong order of magnitude is obvious.What it asks for depends on how the material is declared:
A material declared by mass
Declared per kg — give width and thickness and the quantity in kilograms is derived from the material’s weight per declared unit.
A material declared by area
Declared per m² — give the quantity. Insulation also asks for Thickness (m) and Lambda (W/mK), which is what makes the layer’s thermal performance meaningful.
A material declared by mass, sized by width
The panel always shows the conversion it is making — material unit per construction unit — plus the share of the build-up that layer represents. Close returns you to the construction.
The header reads 3 materials · per 1 m², and each layer shows its quantity per declared unit, its share of the build-up, and its lifetime. Re-open Adjust dimensions on any layer to change it, or drag another material in.
The percentages are shares of mass, not of emissions. A layer that is 0.02% of the weight can still dominate the carbon — check the construction’s own chart after saving.
Check the name, declared unit, and layers, then Save Construction — or Go back to keep editing. Once saved it appears on the Constructions tab, owned by your organization, and can be mapped, compared, and filtered like any other Library entry.
