Delta Trela – Pitched Metal Roof Underlayment – 3’3” x 98’ dimple board StrongBox BC-30CR is a cold

StrongBox BC-30CR is a cold rolled steel backflow enclosure coated with a performance polymer alloy coating

and rot and mildew resistant

This product is made in the USA

preserving the airflow and drainage efficiency necessary for moisture management in wall assemblies

Compatiable with SBBC-45 Series Enclosures

Delta Trela – Pitched Metal Roof Underlayment – 3’3” x 98’ dimple board StrongBox BC-30CR is a coldDelta Trela by Drken is a high performance underlayment designed for pitched metal roofs. Its structured separation layer provides ventilation and drainage, preventing moisture buildup, condensation, and corrosion beneath metal roofing. Made from durable, vapor permeable material, Delta Trela ensures a dry, protected roof assembly while reducing noise and enhancing long term performance. Ideal for residential and commercial applications, it delivers