Windows + Doors

Don’t let heat escape through older windows and doors—use the eScore Program to replace them with energy efficient versions.

Doors, windows and skylights play an important role in keeping heat outside in summer and inside in winter. Unfortunately, many older versions aren’t adequate for creating the “thermal envelope” your home needs to be energy efficient and comfortable.

These days, you can find energy efficient replacement windows, doors and skylights with double panes and insulation in a variety of styles and prices. That means you can get the look you want while reducing heat loss, increasing energy efficiency and lowering your energy bills up to 15%.

Benefits of Replacing Windows + Doors

  • Slows heat loss and gain, saves money, reduces utility bills and improves temperature control and comfort.
  • Decreases the workload on your HVAC system.

What You Should Know

When installing new doors, windows or skylights, always buy ENERGY STAR-certified replacements, which meet or exceed EPA energy efficiency guidelines.

Windows and skylights are rated by two additional factors:

  • U-factor, in which a lower rating represents greater insulating capacity.
  • Solar Heat Gain Coefficient (SHGC), in which a lower rating means less solar heat passes through.

Glass considered “low-e,” which reflects or absorbs heat as infrared light, generally costs more but offers better U-factor and SHGC performance.

You may hear about the materials used to insulate between panes as well. Krypton, for example, is a better insulator and also more expensive than argon. (Both are colorless, odorless and non-toxic gasses.) But considering the U-factor, SHGC and ENERGY STAR ratings are more important than the materials used.

If you’re looking for a lower-cost alternative to replacing single-pane windows, consider installing storm windows.

Before Beginning Work

  • Repair any moisture problems.
  • If your home has an attached garage or gas appliances, install a carbon monoxide monitor.

Maintenance + Upkeep

  • Seal steel doors with two coats of primer and a high-quality exterior-grade paint within a week of installation.
  • For windows, caulk between the interior window trim and wall to reduce air leakage.

TVA Incentives

  • You may be eligible for a rebate when using a Quality Contractor Network (QCN) member.
  • One-time only.
  • Homes with unvented combustion appliances as their primary heat source are not eligible.
  • QCN members must follow TVA installation requirements.
  • Register at to find rebates available in your area.

escore logoEarn rebates for energy upgrades!


Make your home the best it can be. Sign up for eScore™ and get started today.

Get rebates now