# Deconstruct Construction

Deconstruct an opaque or window construction into its constituient materials.

Inputs

**constr [Required]**

An opaque or window construction to be deconstructed. This can also be text for an opaque or window construction to be looked up in the construction library.

Outputs

**materials**

List of material objects that make up the construction (ordered from outside to inside).

**layers**

List of material identifiers that make up the construction (ordered from outside to inside).

**r_val_si**

R-value of the construction in m2-K/W. Note that R-values do NOT include the resistance of air films on either side of the construction.

**r_val_ip**

R-value of the construction in h-ft2-F/Btu. Note that R-values do NOT include the resistance of air films on either side of the construction.

**u_fac_si**

U-factor of the construction in W/m2-K. Note that U-factors include the resistance of air films on either side of the construction.

**u_fac_ip**

U-factor of the construction in Btu/h-ft2-F. Note that U-factors include the resistance of air films on either side of the construction.

**shgc**

The estimated solar heat gain coefficient (SHGC) of the construction. This value is produced by finding the solution to the relationship between U-value, Solar Transmittance, and SHGC as defined for the simple glazing system material in EnergyPlus. More information can be found at https://bigladdersoftware.com/epx/docs/9-5/engineering-reference/ on this partticular sub-page of the engineering reference: window-calculation-module.html#step-4.-determine-layer-solar-transmittance

**t_sol**

The unshaded shortwave solar transmittance of the construction at normal incidence. Note that 'unshaded' in this case means that all blind + shade materials in the construction are ignored.

**t_vis**

The unshaded visible transmittance of the window at normal incidence. Note that 'unshaded' in this case means that all blind + shade materials in the construction are ignored.