Impact Windows

What is the main difference between a standard glass (single glazed) and a hurricane impact-resistant window?
The main design characteristics of impact windows and doors are the shatter-resistant glass securely attached to a high-duty aluminum frame. The impact-resistant glazing consists of two layers of glass, which are glued or tempered to an intermediate layer of a membrane that is shatter-proof. This membrane usually is made from Polyvinyl Butyral (PVB), a plastic film which, depending on the design pressure required, varies from 015 to 0,090 centimetres. When the external glass breaks, the fragments adhere to the pvb film. Standard glass windows, on the other hand, are made of standard float glass that fractures into large, sharp shards when it is broken.

Why are high-impact windows (or any other impact protection system) so important to keep a property’s roof structural integrity?
Windows plays a crucial role in maintaining a structure’s building envelope. A broken window can easily trigger massive structural destruction during lasting hurricane forces. If high-speed winds enter a house, the air pressure inside / outside is significantly different. When this difference occurs, the structure will most likely loose its roof to offer a way out of the continuing pressure. It is now widely known that massive destruction follows when a structure loses a window and allows an entrance to the wind.

Do windows and doors from hurricanes come in different glass colours?
Yes, hurricanes and doors, including Gray, Bronze, Blue and Green, are available in a variety of colors.

Will windows in my house help improve energy efficiency?
Yeah, totally. Impact windows and doors can be configured to have low emissivity glass (commonly called LowE) to increase energy efficiency significantly. With the current LowE glass technology, homeowners can achieve high levels of comfort all year round and significant energy savings. LowE glasses, such as PPG’s SolarBan 70XL or Cardinal’s LoWE 366, offer the perfect balance between high visibility and solar control. This balance is a big feature. Visibility was in the past seriously compromised to achieve high levels of solar-generated heat transfer to the house. Homeowners can include these special glasses in their doors and windows when ordering their windows.

What is the U-factor, what is it?
The U-factor determines how well the door or the window keeps the heat inside or inside the structure. The lower the U-factor, the higher the heat flux resistance in a window and the better its insulating properties. The lower the U-factor, the better the window / door assembly is if the heat transfer is blocked. The residents of Miami should be aware that low U factors are most important in heat-dominated climates, i.e. in cold northern regions. While a low U-factor is beneficial for cooling dominated climates such as South Florida, a low solar heat gain is very desirable for impact windows and doors.

What is the coefficient of solar heat gain?
The Solar Heat Gain Coefficient (SHGC) is the heat entering a room. The smaller the number, the less heat the house penetrates. When a home is mainly air-conditioned, the SHGC value is the right rate to ask. Hurricane resistant glass windows and doors have a SHGC of 0.72, while bronze and gray glass have a SHGC quality of 0.55 and 0.56, respectively. The LowE Glasses, like SolarBan 70XL, SolarBan 60 or LowE 366, can be lowered to less than 0.30.

Do impact-resistant windows and doors provide good protection against ultra-violet?
Ultra-violet (UV) rays, which are not visible to the human eye in part of the solar spectrum, cause fabric to decompose over time. By comparing UV readings, it should be remembered that the lower the level, the more UV is blocked. For example, a 0% U-V value is a 100% block. Clear, gray and bronze-resistant doors and windows provide 100% coverage, 0 percent UV penetration.

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