Underlayments for Metal Roofing
HydraShell MAX and HydraShell Supreme SA
HydraShell MAX and HydraShell Supreme SA are McElroy Metal’s new underlayments. HydraShell MAX is the standard synthetic underlayment and HydraShell Supreme SA is a peel-and-stick underlayment. HydraShell MAX has a four-layer construction and can be used under all types of finished roofing materials, including steel roofing and is suitable for roof pitches as low as 1/2:12.
HydraShell MAX requires significantly fewer fasteners than competitive products and provides a durable deck cover. HydraShell Supreme SA is the best choice in high-temperature, self-adhering applications.
The SBS modified asphalt provides excellent pliability and the cool gray surface reduces heat build-up.