The Enhanced Fujita Scale (EF Scale) is the primary system used in the U.S. to classify tornado intensity. It measures storms from EF‑0 to EF‑5, based on the damage they cause and the wind speeds required to produce that damage.
But here’s the part many people don’t realize: In the building industry, the EF Scale also intersects with how manufacturers define storm-related exclusions in their warranties.
Why 60 mph Matters
In many roofing and cladding warranties, manufacturers state they will not cover damage if it results from a “classified natural storm.” Under the original Fujita framework, any wind event above 60 mph could be considered a storm event—meaning warranty coverage may not apply.
That’s why, in exterior design and construction, Lerch Bates emphasizes securing warranties that match project‑specific wind speeds, especially in regions where winds routinely exceed 60 mph. It’s a critical step in protecting owners, contractors, and long‑term building performance.
How Lerch Bates Supports You After Severe Weather
With summer bringing more intense storms across the U.S., property owners face increased risk of wind, cladding, and roofing damage. Lerch Bates’ Forensic Engineers provide:
- Damage assessments to determine the true cause and extent of loss
- Wind‑speed and storm‑event analysis to understand whether damage aligns with warranty conditions
- Failure investigations for roofing, façades, glazing, and building envelope systems
- Expert reporting to support insurance claims, repairs, and litigation
- Guidance on rebuilding and mitigation to reduce future risk
Our team helps you move from uncertainty to clarity—quickly, accurately, and with the technical depth that complex storm events demand.
