Ask the Energy Expert

One important way to help keep cool air in and costs down.

During these hot summer months, I get many questions about air conditioning and reducing energy to save help save money. Several customers have noted their A/C seems to run nonstop, but some rooms still feel warm. They ask whether they could be losing cool air somewhere without realizing it.

The culprit might be smaller than you think. Tiny gaps around doors and windows can let cool air escape, forcing your system to work harder. Weather-stripping could be your most powerful defense this summer. Here's how to spot the problem and fix it fast.

The hidden energy drain in your home

Those barely noticeable gaps around doors and windows can rob your home of energy efficiency. It's like leaving a window cracked open year-round. According to energy experts, these air leaks can account for up to 30% of your heating and cooling costs.

When your treated air escapes through these gaps, your HVAC system works overtime, driving up energy usage and your monthly bills. Weather-stripping creates an effective barrier that keeps your cool air where it belongs — inside your home.

What are the different types of weather-stripping?

• Foam tape – Budget-friendly and easy to install, perfect for irregular-shaped gaps.
• Door sweeps – Tackle the largest source of leaks by sealing the space under exterior doors.
• V-strip seals – Ideal for windows that open and close, creating a spring-like barrier.
• Tubular gaskets – Durable solution for frequently-used doors with various gap sizes.

Installation tips

With materials typically costing under $100 for an entire home, weather-stripping delivers one of the highest returns on investment among home efficiency upgrades. Follow these simple steps:

1. Clean surfaces thoroughly before application.
2. Measure twice, cut once using a sharp utility knife.
3. Apply to all sides of doors and windows, ensuring you don't interfere with operation.
4. Test by closing doors/windows to verify a proper seal.

Take control of your home's efficiency through proper sealing — it's a year-round energy saver that keeps your home comfortable while reducing your environmental footprint.