Halo,

I have a project that does daylight calculation. My wall material is coated steel like this picture. After searching about the reflection factor about this material, I found a pdf about coated steel LRV.

https://taylormetal.com/wp-content/uploads/2019/07/LRV-Taylor-Metal-Steelscape-pdf.pdf

I have a question, where should I put the LRV (i.e. I choose metallic silver coating)? Reflection factor or reflective coating? Or both?

I think since the steel is "coated" so there should be a reflective coating too, is that right?