Technical Documents on this page refer to the 2020 FORTIFIED Home Standard. All projects permitted on or after must meet the requirements of the 2025 FORTIFIED Home Standard .
lso included are discussions of masonry and stone elements, examples of typical oor plans for earthquake- resistant one- and two-story homes, excerpts of seismic requirements from building codes, and checklists for homebuilders.
Impact resistance is a key consideration for homeowners seeking durable roofing that can withstand hail, wind-driven debris, and severe weather. In the United States, roof assemblies receive ratings and classifications based on standardized tests and regional code requirements.

By studying homes impacted by severe weather, IBHS identifies common construction weaknesses and tests solutions at the only research center capable of subjecting full-scale structures to realistic storm conditions, including wind-driven rain, hail and high winds.
The main strategy for blast-resistance structures design is to reduce blast demands, which inherently is achieved by reducing the deformations in structural and non-structural building components.

The tables summarize the 2024 IRC, IBC, and IEBC requirements related to flood damage-resistant materials, notes changes from the 2018 and 2021 editions, and compares the IRC, IBC, and IEBC provisions to the NFIP requirements.