Ag Panels are a metal roofing and siding material.  They are also known as C-Lok and G-Rib panels.  The cross-section of the panels is in this diagram (right).   The panels are formed and cut to specified length in fabrication shops and provided to contractors and individuals to provide a durable, attractive and affordable surface for roofs and siding.  Panels provide the bulk of the coverage, but they are also accompanied by trim for ridges, corners, valleys and drip edges, snow breaks and insulation underlayment.  Ag Panels require special screws that are self-starting and have a gasket below the head to provide a seal against water. 

The above is a simple run-in for horses that uses Ag Panels.  Ag Panels are often used on Gambrel Roofed barns (above) and most commonly used on modern pole barns (below)

Companies that use these calculators and sell Ag Panel products:

• CN Metals (Oakland, Maryland): https://www.cnmetalsllc.com/

The C-Lok, Ag Panel, G-Rib price survey includes the following for the most recent pricing surveyed:

• Date Survey: 3/7/24
• Source of Pricing Source: CN Metals
• Cost per Unit:
  • [$3.19 USD/ft] - Panel (36" wide) - dollars per linear foot
  • [$0.09 USD/screw] - Screws (with seal gasket) - dollars per screw 
  • [$1.74 USD/ft] - Ridge Cap - dollars per linear foot
  • [$1.84 USD/ft] - Outside Corner (trim) - dollars per linear foot
  • [$1.25 USD/ft] - Snow Rail - dollars per linear foot
  • [$2.85 USD/ft] - Drip Edge - dollars per linear foot
  • [$0.2 USD/ft²] - Fanfold Insulation - dollars per square foot