How To Seal Drafty Windows and Doors For Better Heating

Drafty windows and doors can make your home feel chilly, spike your energy bills, and put unnecessary strain on your heating system. Sealing these leaks is one of the easiest ways to improve comfort and efficiency, but it’s important to know the best approach. While DIY methods for learning how to seal drafty windows and doors exist, calling the air sealing experts at Oliver ensures the job is done correctly, safely, and with long-lasting results.

Step-by-Step Guide

Even with these tools, identifying all leaks, especially the hidden ones behind trim, frames, or around attic and basement penetrations, can be tricky. Oliver’s team uses professional diagnostic tools like blower-door tests and home energy audits to detect even the smallest leaks, ensuring your home is truly airtight.

Step 1. Identify The Drafts

Start by checking for leaks. On a windy day, run your hand along window edges and door frames, or hold a lit candle or incense stick near suspected gaps. If the flame flickers, you’ve found a draft.

DIY methods can catch the obvious leaks, but many homes have hidden areas where air escapes, such as recessed lighting, attic hatches, or electrical outlets. Oliver’s air sealing services detect these less obvious sources and ensure no cold air slips through.

Step 2. Choose The Right Sealing Method

Common DIY options include:

• Weatherstripping: Ideal for doors and movable windows.
• Caulking: Works for stationary cracks around frames.
• Door Sweeps/Thresholds: Block gaps under doors.

Oliver takes this a step further. We customize sealing strategies based on your home’s unique layout, using professional-grade materials that last longer than typical DIY solutions. Our team ensures every crack, crevice, and gap is properly sealed for maximum energy savings.

Step 3. Prepare The Area

Clean the surfaces to remove dust, dirt, or old caulk. For doors, remove rugs or mats that may interfere with a new sweep. Proper preparation ensures materials adhere correctly. Even minor mistakes in preparation can reduce the effectiveness of DIY sealing. Oliver handles every detail, from surface prep to precise material application, giving you professional-quality results.

Step 4. Install Sealing Materials

Apply caulk to gaps around stationary frames, install weatherstripping on doors and movable windows, and add door sweeps where needed. Precision is key because incorrect installation can leave leaks or damage surfaces. Oliver’s trained technicians do this with advanced techniques and professional materials, ensuring that your home is airtight and your heating system works efficiently.

Step 5. Test And Maintain

After sealing, check for drafts again. Periodic maintenance, like replacing worn weatherstripping or checking caulk, is important for long-term comfort. Oliver also provides ongoing advice and services to maintain your home’s performance year-round.