As a homeowner in Philadelphia, controlling energy costs can be a challenge, especially during hot summers and freezing winters. One of the most overlooked causes of high utility bills is poor insulation. The good news? Detecting energy leaks around your doors and windows is easier than you think.
At Spennato Family Roofing, we help Philly homeowners from East Falls to South Philly find simple solutions for comfort and savings. Here are six smart and effective ways for detecting energy leaks around your home’s most vulnerable entry points.
1.The Hand Test: Feel the Draft
One of the easiest ways for detecting energy leaks is simply using your hand. On a cold or windy day, place your hand around the edges of doors and windows. If you feel a breeze, there’s a leak.
This DIY method is common in older homes throughout Philadelphia, especially those with original wood framing and outdated seals. If you notice consistent drafts, it’s time to upgrade.
2.Use a Candle or Incense Stick
Light a candle or incense stick and slowly move it around doorframes and window edges. If the flame flickers or the smoke trail moves erratically, it indicates airflow, a sign you’re losing energy.
This simple trick is a classic for detecting energy leaks in places you might overlook, like mail slots, attic hatches, or basement windows.
3.Try the Flashlight Trick
At night, have someone stand outside your home while you shine a flashlight around door or window seams from the inside. If light shines through, air is likely getting in too.
This is a great tactic for detecting energy leaks without professional tools, ideal for tight Philly rowhomes or garden-level apartments.
4.Seal With Weatherstripping and Caulk
Once you’ve found leaks, seal them with weatherstripping (for doors) or caulk (for windows and trim). These materials block airflow and boost your home’s energy efficiency.
We always recommend sealing before winter hits. It’s one of the quickest fixes for detecting energy leaks and solving them on the spot.
5.Schedule a Professional Energy Audit
If you want precision, a home energy audit is the gold standard for detecting energy leaks. Our team uses thermal imaging and blower door tests to pinpoint exactly where your home is losing energy.
Professional audits often reveal issues you can’t see, like air leakage between walls or in crawl spaces. Spennato’s energy team can inspect your Doors & Windows and create a plan for better performance.
6.Upgrade to Energy-Efficient Doors and Windows
Sometimes, old doors and windows are beyond simple repair. If your frames are warped, or panes are cracked, upgrading to energy-efficient replacements is the best long-term solution.
Modern materials are built with insulation in mind, and Philly homeowners often see a drop in energy bills within the first season. Browse our expert Doors & Windows services to learn how we can help for detecting energy leaks around your home.
Visit Us in Philadelphia
From Old City to the Northeast, we know Philly homes and what they need to stay energy-efficient. Visit us in Philadelphia for local advice and expert service that helps you tackle detecting energy leaks with confidence.
Frequently Asked Questions
How do I know if my windows are leaking energy?
Feel for drafts, look for condensation, or use the candle test near edges and corners.
Is it expensive to replace leaky doors or windows?
Costs vary, but energy-efficient upgrades usually pay for themselves in savings within a few years.
Can I fix leaks myself?
Yes, weatherstripping and caulking are affordable, effective DIY solutions.
Do curtains help reduce energy loss?
Absolutely. Thermal curtains add an extra layer of insulation.
How often should I check for energy leaks?
We recommend testing before each heating and cooling season, spring and fall are ideal for detecting energy leaks.
Conclusion
Detecting energy leaks is one of the smartest things you can do to protect your home, lower your bills, and stay comfortable all year long. Whether it’s sealing gaps or upgrading windows, Spennato Family Roofing is here to help Philadelphia homeowners stay efficient and cozy.
Trust our team to find and fix the leaks, so your home stays safe, strong, and energy-smart.

