C400 / C700
![](https://dacenterprise.com/wp-content/uploads/2018/01/C400.jpg)
C400 – Polystyrene insulation (better)
C700 – Polyurethane insulation (best)
These models feature 7/16″ x 3-5/32″ Western Red Cedar or Fijian Mahogany tongue and groove face boards with cedar/mahogany trim boards adhered to 27 gauge steel base sections.