Durable Duro-Guard® Cover Boards for Commercial Roofing Systems

A smooth and stable surface

Four families of composite cover boards are available within our Duro-Guard portfolio. Also known as roof boards or double-layered insulation, cover boards are a critical component of the roof assembly. Their primary advantage is to provide a smoother, more stable substrate for membrane adhesion.

Additional benefits:

Provide insulation for fasteners, reducing energy loss and possible thermal bridging at fasteners and insulation joints
Eliminate protrusions on membrane surface from backed-out fasteners
Reduces the need for continual membrane repair throughout the service life of the system
Improve fire protection
Protect against rooftop traffic
May improve hail resistance by protecting the insulation and supporting the roofing membrane

Duro-Last^® offers four cover board products:

DensDeck^® — excellent fire resistance and uplift properties
DEXcell^® — glass or cement options provide fire, mold and mildew resistance or exceptional freeze-thaw resistance
Everboard™ — twice the compression strength plus excellent freeze-thaw moisture and mold resistance
SECUROCK^® — provides strength and water resistance plus optional additional fire, mold and moisture protection