Unsightly metal brackets, visible vinyl liners, extra hardware or heavy glazing beads are the usual indications that a window is impact-certified, and that makes the “Sterling” unique. An impact-certified “Sterling” double-hung looks the same as a standard “Sterling” unit, the manufacturer says. The glazing bead and even the glass look alike, and there are no visible vinyl liners or metal brackets.
The “Sterling” offers the same protection, thermal ratings, acoustical ratings and energy performance as other impact-certified products in this class, yet it looks like a traditional double-hung window, says Kolbe & Kolbe.
Testing was conducted with the minimum Gateway size required for residential units. Additionally, Kolbe & Kolbe says it tests products to the largest catalog size available, which means that the “Sterling” double-hung was tested to a glass size of 40" x 36"; all smaller units qualify.
These units were tested for air, water, structural, forced entry and impact/cycling at a design pressure of 65 and achieved certification, Kolbe & Kolbe says.
In addition to now being able to enjoy the true natural beauty of an impact-certified double-hung without looking at unattractive hardware or vinyl parts, the manufacturer notes that many of the insurance companies on the East Coast are now offering lower insurance rates if home owners meet the new IBC codes.
This feature is solely for educational and informational purposes. Nothing on this page should be construed as policy, an endorsement, warranty or guaranty by the National Association of Home Builders of the featured product or the product manufacturer. The National Association of Home Builders expressly disclaims any responsibility for any damages arising from the use, application or reliance on any information contained on this page.
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