- The primary insulating properties of your new windows will be in the glass, not in the frame. Choosing a dual pane window with an inert gas between the panes will provide the primary insulating properties of the windows. However, aluminum transmits heat and cold more easily than vinyl. In places with bitterly cold winters, aluminum may provide slightly lower insulation values.
- The inert gas between the window panes and the presence of a second piece of glass provide much of the soundproofing of a modern window. However, the frame also has an effect on the amount of outside sound that reaches the inside of your house. Although many people think vinyl provides better soundproofing, research at the Riverbank Acoustical Laboratories shows that aluminum windows block slightly more sound than vinyl.
- In areas that have frequent, strong storms and wind, the strength of the window frame is very important. Aluminum windows are generally stronger than vinyl and may be better for coastal installation in places that experience frequent gales and storms.
- Window maintenance won't be a big issue when your windows are first installed. However, over time, vinyl windows tend to maintain their visual appearance longer. One problem with some vinyl windows is that the sashes are glued and can not be taken apart. With most aluminum windows, a broken pane of glass is easier to replace.
- Both vinyl and aluminum windows are designed to last a long time. There are arguments for both vinyl and aluminum. Vinyl windows tend to look good for a long time, and do not require painting. Aluminum is a harder material and can be repainted as needed. Vinyl will not corrode over time; aluminum can corrode with moisture and air pollutants. As a softer material, vinyl may warp and bend over time, a problem to which aluminum windows are less prone.
