Why consider vinyl windows? Why Buy Vinyl Windows?
What is a Design Pressure Rating? Design pressure, or also referred to as DP, expresses a numerical value that defines the structural wind loading requirements (in pounds per square foot) for a building and the components and cladding of a building. For windows and patio doors, the higher the DP rating indicates better performance under wind load (eg: a DP-50 window is structurally more sound than a window rated DP-35). Coastal regions often require higher DP ratings by code to anticipate higher wind velocities that can be encountered in proximity to the coast line. What is a TDI rated window or patio door? The Texas Department of Insurance (TDI) evaluates windows and patio doors for compliance with the wind loads specified in the International Residential Code (IRC) and the International Building Code (IBC). A TDI product evaluation is not an endorsement of the product or a recommendation that the product be used. Their product evaluation is intended for use by those individuals who a
