Design Pressure Ratings Explained for Clearwater Windows and Doors
What A Design Pressure Rating Tells You A design pressure rating, usually called DP, measures how much wind load a window or door can handle before it starts to deform, leak, or fail. For homes near the Gulf, bay, or wide open stretches of wind, a product that looks solid can still be the wrong choice if its pressure rating is too low. Higher pressure numbers are not a marketing badge by themselves, but they do tell you the unit was built and tested to handle more