1) Sears is over priced & waste alot of time on an estimate.
I read a helpful article online at :
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(as an example, I wasn't aware that you had to change the window frames too; i.e you can't just install impact resistant glass in window frames.. stuff like that) I also pasted a paragraph below.
I wouldn't recommend impact resistant window film. ( if you're going to do it, get impact resistant windows/glass)
I went to Miami dade County's web site & they had a search function that lets you select an item (windows) & building materials- I chose impact resistance, and it pulls up a list of building code compliant companies that installed impact resistant glass. Maybe your city has a similar online function ?
Dave Olmstead, spokesman for PGT Industries in Venice, Florida, agrees that no matter how strong a window is the attachment to the building structure is critical. Olmstead says a window that is 53-inches by
76-inches would have 28 square feet of exposure, and with a wind speed of 146 mph from a category 4 hurricane would result in a load on the window equivalent to 1,958 pounds of pressure. For the window to perform correctly, the load has to be transferred to the building itself, which is done by using suitable anchors to transfer the load from the window or door frame to the rough opening without causing failure.