Sliding glass doors are a beautiful addition to any home, offering easy access to outdoor spaces and providing abundant natural light. However, they can also be a source of frustration when they become drafty, leading to increased energy costs and a less comfortable living environment. If you’re dealing with drafty sliding glass doors, don’t worry—there are several ways to fix the problem and restore your home’s comfort. Here’s a step-by-step guide on how to fix drafty sliding glass doors.

• Identify the Source of the Draft

Before you can fix the draft, you need to identify where it’s coming from. Common sources of drafts include gaps between the door and the frame, worn weatherstripping, and misaligned doors. To locate the draft, carefully feel around the edges of the door on a windy day, or use a candle or incense stick to see where the flame or smoke wavers.

• Replace Worn Weatherstripping

Weatherstripping is the material that lines the edges of the door to prevent air from leaking in or out. Over time, it can wear out, become brittle, or peel away, allowing drafts to enter your home. Replacing the weatherstripping is an easy and cost-effective way to fix drafty sliding glass doors.

Step 1: Purchase replacement weatherstripping. Make sure it’s designed for sliding glass doors.

Step 2: Remove the old weatherstripping by peeling it away from the door frame.

Step 3: Clean the area with a mild cleaner to remove any adhesive residue.

Step 4: Apply the new weatherstripping by pressing it firmly into place, making sure there are no gaps.

• Adjust the Door Alignment

If the sliding glass door is not properly aligned, it may not close tightly against the frame, leading to drafts. Adjusting the door alignment can help eliminate these gaps.

Step 1: Check the rollers at the bottom of the door. If they’re worn or damaged, they may need to be replaced.

Step 2: Use a screwdriver to adjust the screws on the rollers, raising or lowering the door as needed to ensure it aligns properly with the frame.

Step 3: Test the door by sliding it open and closed to make sure it’s sealing tightly.

• Seal Gaps with Caulk

Even with new weatherstripping and proper alignment, small gaps may still exist around the edges of the door. Sealing these gaps with caulk can help prevent drafts.

Step 1: Choose a clear, weatherproof caulk suitable for outdoor use.

Step 2: Apply the caulk along the edges of the door frame where gaps are present.

Step 3: Smooth the caulk with your finger or a caulk smoothing tool to ensure a tight seal.

• Add a Door Sweep

A door sweep is a strip of material attached to the bottom of the door that helps block drafts. If your sliding glass door is drafty at the bottom, installing a door sweep can make a big difference.

Step 1: Measure the width of the door to ensure you purchase the correct size sweep.

Step 2: Attach the sweep to the bottom of the door, following the manufacturer’s instructions.

Step 3: Test the door to ensure the sweep doesn’t interfere with the door’s operation.

• Insulate the Glass

If the glass in your sliding door is the source of the draft, consider adding a layer of insulation. One option is to apply a window insulation film, which creates an additional barrier against cold air.

Step 1: Purchase a window insulation kit of your choice.

Step 2: Cut the film to fit the size of the glass.

Step 3: Apply the film according to the manufacturer’s instructions, using a hairdryer to shrink the film for a tight fit.

• Consider Replacing the Door

If your sliding glass door is old or severely damaged, it may be more cost-effective to replace it altogether. Modern sliding glass doors are designed with energy efficiency in mind and often come with double-pane glass and advanced weatherstripping.

Conclusion

Fixing drafty sliding glass doors can be a simple DIY project that significantly improves your home’s comfort and energy efficiency. By replacing worn weatherstripping, adjusting the door alignment, sealing gaps, and adding insulation, you can keep the cold air out and enjoy a cozy living space all year round.

If these fixes don’t solve the problem, it may be time to consider upgrading to a new, energy-efficient sliding glass door. For more information about fixing sliding glass doors or assistance ordering replacement hardware, Contact the WHD Team! Our experts will be happy to help you.