> For the complete documentation index, see [llms.txt](https://docs.ladybug.tools/hb-energy-primer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ladybug.tools/hb-energy-primer/components/1_constructions/opaque_construction.md).

# Opaque Construction

![](/files/-MihpdriE6e40yP_Vl5b)

![](/files/-MihpdrjOpFvUDuAzJ8l) - [\[source code\]](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.