# Opaque Construction

![](https://459479801-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Ma9N5K8lMbAhbyBVgms%2Fuploads%2Fgit-blob-58d9c067b63d0eb068f49c3b9d808c85bc971096%2FOpaque_Construction.png?alt=media)

![](https://459479801-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Ma9N5K8lMbAhbyBVgms%2Fuploads%2Fgit-blob-c349bb908c4872d2d7e8ad819faee99b11f8d128%2FOpaque_Construction.png?alt=media) - [\[source code\]](https://github.com/ladybug-tools/honeybee-grasshopper-energy/blob/master/honeybee_grasshopper_energy/src/HB%20Opaque%20Construction.py)

Create an EnergyPlus opaque construction. Material inputs can be either the identifiers of materials within the library or a custom material made with any of the EnergyPlus Material components.

Note that the \_materials should be ordered from outermost (exterior) layer to the innermost (interior) layer.

## Inputs

* **name**

  Text to set the name for the Construction and to be incorporated into a unique Construction identifier. 
* **materials \[Required]**

  List of materials in the construction (from exterior to interior). These materials can be either fully-detailed material objects built with the material components or text for a material identifier to be looked up in the opaque material library.  Note that a native Grasshopper "Merge" component can be used to help order the materials correctly for the input here. 

## Outputs

* **constr**

  An opaque construction that can be assigned to Honeybee Faces or ConstructionSets.