There's no better time to do it, since these incentives may not be available forever. The government is handing homeowners ...

Jeld Wen makes windows and doors, including single-hung, bay, and casement windows, and patio, interior, and exterior doors.

That's because it could take decades to recoup the $8,000 to $24,000 you'll spend on new windows and installation. Energy Star-qualified windows can lower your energy bills by 7 to 15 percent.

Windows also have an R-value. Single-pane windows have an R-value of 1, while Energy Star–rated windows typically have an R-value of 3. When properly installed, an insulated curtain can increase ...