Very Severe Hail Roofing Systems
Durable, resilient roofing systems for very severe hail (VSH) regions
Lay down the roof that stands up to everything
From blazing heat to ice storms and hail, there is no denying extreme weather events are increasing in frequency and severity across the U.S. And among the range of climate- and weather-related events that can threaten your building’s first line of defense — the roof — hail can cause some of the most extensive damage. Duro‑Last® has you covered with durable thermoplastic single-ply roofing systems that provide energy savings and adhere to FM Global System Specifications for Very Severe Hail (VSH) and Severe Hail (SH) regions.
Know Your Zone
Very Severe
Severe
Moderate
These zones are used when designing, specifying and constructing roof systems to ensure they meet the criteria to withstand relative impacts.
Very Severe Hail
Greater than 2” - Baseball
Severe Hail
Up to 2” - Egg
Moderate Hail
Up to 1 ¾” - Golf ball
Duro-Last PVC VSH-Rated Roofing Assemblies
All Duro-Last roofing membranes are UL and FM Approved, and many of our metal edge and drainage products offer ANSI/SPRI ES-1 and GT-1 compliance. When installed to specifications, Duro-Last roofing membranes and assemblies meet or exceed major national wind code requirements, as well as Florida, Miami-Dade and other required regional approvals throughout the United States and Canada.
Duro-Fleece®, Duro-Last and Duro-Tuff® membranes in 60 or 80 mil are approved for VSH applications.
FM classified gypsum board is adhered for enhanced strength and impact resistance against extreme hail, wind uplift, punctures and fire.
Two layers of Duro-Guard® ISO protect the roof deck against hail damage. The base layer is mechanically fastened while the top layer is adhered for added protection.
A steel or concrete roof deck provides a strong base for a VSH roofing system and helps provide stability in severe weather situations.
PVC Membrane Options
Duro-Fleece®, Duro-Last and Duro-Tuff® membranes in 60 or 80 mil are approved for VSH applications.
DensDeck® StormX™ Prime Roof Board
FM classified gypsum board is adhered for enhanced strength and impact resistance against extreme hail, wind uplift, punctures and fire.
Insulation
Two layers of Duro-Guard® ISO protect the roof deck against hail damage. The base layer is mechanically fastened while the top layer is adhered for added protection.
Roof Deck
A steel or concrete roof deck provides a strong base for a VSH roofing system and helps provide stability in severe weather situations.
