Windows Made of Aluminum
Aluminum was really the first material that replacement windows were made of. But as technology got better, other materials such as vinyl and fiberglass came on the scene. While these new materials outperform aluminum on a number of counts, aluminum still remains the material of choice for specific applications such as commercial buildings, multi-family units and residential homes where large oversized windows are specified. The reason is because aluminum is still the strongest and most economic window available. Aluminum's durability and high strength-to-weight ratio allows it to be formed into custom sizes. And because aluminum has a higher mass (weight) than vinyl it is able to block out noise better -- another attribute sought after in commercial applications.
The Advantages of Aluminum Frames
Weather Resistant
While aluminum frames do a good job at keeping the rain and wind out, where they lack is keeping the heat in. Aluminum or metal frames conduct heat easily, earning them a high U-value (the higher the U-value, the more heat a frame loses). The U-value of aluminum frames can be as high as 2, compared to vinyl or wood frames which have low U-values (0.3 to 0.5). Aluminum frames also tend to feel cold to the touch and are prone to condensation.
To offset this, manufacturers install a thermal break – a strip of vinyl or sometimes foam that separates the inside and outside of the frame therefore reducing heat conductivity. They also outfit the window with energy efficient glass to reduce heat loss.
Noise Control
Aluminum will always surpass vinyl where noise control is concerned. Vinyl has no mass and in order to block out noise, it has to be too thick. Aluminum has a high mass (weight) and does a great job of blocking noise.
Low Maintenance
Aluminum’s hard surface resists denting and weathering. Aluminum windows can be painted, unlike their vinyl window counterparts. However, the paint job will not be as good as one from a window frame made from wood.
Economical
Significantly cheaper than vinyl, wood and fiberglass, aluminum replacement windows provide a strong yet economical window solution for homeowners and building owners.
Aluminum Frames Work Best in Specific Applications
Aluminum frames are tougher than wood. They are also lighter and easier to handle. These attributes make aluminum windows easy to install for maximum performance.
Custom Shapes: Because of aluminum’s high strength-to-weight ratio, they can be easily formed into any custom shape.
Large, Oversized Windows: Aluminum is the material of choice for homeowners who want to maximize light with large oversized windows.
Commercial Buildings: Aluminum frames are stronger and are better suited for large window sizes. They are more economical than vinyl or wood. Aluminum outperforms vinyl is noise abatement.
Sliding and Patio Doors: A quarter of sliding and patio sales come from aluminum.
Coastal Areas: Aluminum frames are strong and durable and resist wind making them a good choice for coastal applications.
Warm Climates: Aluminum frames are a good application where air-conditioning bills are larger than heating bills.