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Mulled windows are no less efficient than individual windows, provided the wall opening is the same size. Larger wall openings filled with glass will always reduce overall energy efficiency, as glass transmits heat more readily than a solid wall. If the windows that are mulled together have the same square footage as individual windows, you might actually see a small decrease in your electric bills, as mulled windows let in more natural light that can reduce interior lighting costs.

Deciding whether to repair or replace a window depends on the specific issue, the window's age, and the cost-effectiveness of the solution.

Repair is often better for:

• Minor issues such as a single broken glass pane, a stuck window, or small leaks. Repair is typically more affordable for isolated problems.

Replacement is the better long-term solution for:

• Major problems like deteriorating or rotting frames, significant leaks, or drafts.

• If your windows are over 15 years old, as repairs may only be a temporary fix for an aging unit.

• If you have a widespread problem affecting several windows.

You will need about half of a caulking cartridge to caulk one window. The average home has eight to 10 windows, so you would need about 4 or 5 cartridges to caulk every window in an average-sized house. However, you may not need to caulk all the windows at once. If just one window has a pesky draft, you may only need half of a cartridge to fill in the gaps.

The purpose of an awning window is to let fresh air into your home without taking up too much wall space. They’re ideal if you live somewhere that gets a lot of rain because their design helps prevent rain from coming into your home. In bathrooms, awning windows also help with ventilation but don’t compromise your privacy.