Ensure all new windows are installed by trained professionals according to manufacturer instructions to avoid voiding warranties and ensuring structural safety.
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Steps
1
Evaluate your current windows to determine if you should update existing units with caulk, weatherstripping, or storm panels, or proceed with a full replacement if frames are deteriorated or out of square.
2
Measure the height and width of the windows to be covered from inside molding to inside molding in multiple positions, using the smallest measurements to determine the required size.
3
Select a frame material based on thermal resistance; fiberglass, vinyl, and composite materials generally provide greater thermal resistance than aluminum or steel.
4
Choose the glazing type, opting for double- or triple-pane units. Ensure the gaps between panes are filled with inert gases such as argon or krypton to reduce heat flow.
5
Select a low-emissivity (low-e) coating based on your climate: use coatings to reduce heat loss in cold climates and those that reduce heat gain (low SHGC) in warm climates.
6
Verify the window's energy performance by looking for the ENERGY STAR label and reviewing the National Fenestration Rating Council (NFRC) labels for U-factor and Solar Heat Gain Coefficient (SHGC).
7
Choose an operation type based on air leakage needs; awning, hopper, and casement windows generally have lower air leakage rates than sliding or double-hung windows.
8
Hire a reputable, fully insured professional to install the windows according to manufacturer recommendations for flashing and air sealing to ensure maximum energy efficiency.
Pro Tips
Look for whole-unit U-factors and SHGCs rather than center-of-glass ratings for a more accurate reflection of energy performance.
In temperate climates with both hot and cold seasons, select windows with both low U-factors and low SHGCs.