Wind Load Capacity tells you how strong your window is. It identifies the load, induced by wind, that a window or door is rated to withstand. It’s referred to as Design Pressure or DP rating by the people in the testing lab.
The force on a structure arising from the impact of wind.
Our Window's Defense
Multiple Internal Chambers and Bends: Having multiple chambers and bends in the vinyl frames add a considerable amount of strength to the overall window or door.
Dual Walls: Two walls are stronger than one wall. There are no single wall vinyl pieces on the Premium Series windows.
Fiberglass Reinforcement: InterForce II is a fiberglass reinforcement adding superior strength and stability to the meeting rails or our Premium Series windows. (Not available on sliding doors.)
Although metal adds strength to windows, it comes at a cost - energy efficiency. Metal is a super conductor. It conducts heat from the inside of your house to the outside in the winter and brings heat into your home in the summer. This is why we use fiberglass to reinforce our windows. Fiberglass in much less conductive than metal yet still ads strength to your windows.
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