How To Seal Gap Between Sliding Glass Doors

Sliding glass doors provide a great way to bring natural light into a home. However, if the gap between the doors is not properly sealed, it can lead to air infiltration, resulting in an uncomfortable environment and wasted energy. Luckily, with a few simple steps, you can easily seal the gap between your sliding glass doors and ensure that your home stays comfortable and energy efficient.

Step 1: Clean the Tracks

Before you begin, you’ll need to make sure that the tracks on both sides of the sliding glass door are clean and free of debris. Use a vacuum cleaner to remove any dust or dirt that may be in the tracks. If there is any residue left, use a damp rag to wipe it away.

Step 2: Measure the Gap

Once the tracks are clean, you’ll need to measure the gap between the two doors. Measure the gap at the top, middle, and bottom of the doors to get an accurate measurement. This will help you determine the type of sealant you need to use.

Step 3: Choose the Right Sealant

Once you have your measurements, you’ll need to choose the right sealant for the job. A good choice is a silicone-based caulk, as it is flexible and will not crack or shrink over time. If you are dealing with a large gap or if you live in a particularly cold climate, you may want to choose a polyurethane-based caulk, as it is more durable and can withstand extreme temperatures.

Step 4: Apply the Sealant

Once you have the right sealant, you can begin applying it to the gap between the doors. You may need to use a caulking gun if the gap is more than 1/4 of an inch wide, otherwise you can use your finger. Make sure to use an even layer of sealant and smooth it out with your finger or a damp cloth. Allow the sealant to dry completely before you close the doors.

Step 5: Test the Seal

Once the sealant is dry, it’s a good idea to test the seal by closing the doors and feeling around the gap. If the seal is tight and there is no air infiltration, then you have successfully sealed the gap between your sliding glass doors. If you are still feeling air coming through, you may need to apply a thicker layer of sealant or use a different type of sealant.