How to Reseal Windows: Step-by-Step Guide

Welcome to our article on how to reseal windows! If you’re looking for a way to keep your windows secure and energy efficient, then you’ve come to the right place. In this article, we will explore the 12 steps to take when resealing your windows to ensure they are airtight and weather-resistant. With the help of some tips and tricks, you’ll be well on your way to having windows that are secure and energy-efficient. So, let’s get started!

Steps to Reseal Windows

Step 1: Inspect the Windows

The first step in resealing your windows is to inspect them for any signs of damage or wear. Look for cracks, gaps, or holes in the frames, sashes, or sealant. This will give you an idea of how much work needs to be done and where to focus your efforts.

Step 2: Remove Old Sealant

If there is old sealant on your windows, it will need to be removed before you can apply new sealant. Use a putty knife or scraper to gently peel away the old sealant. Be careful not to damage the window or frame in the process.

Step 3: Clean the Window and Frame

Before applying new sealant, make sure the window and frame are clean and dry. Use a mixture of warm water and mild detergent to clean away any dirt, debris, or grease from the surface. Dry the area thoroughly with a cloth or towel.

Step 4: Measure the Gap

Measure the gap between the window and the frame using a tape measure. This will help you determine how much sealant is needed and what size gap-filling material to use.

Step 5: Choose the Sealant

There are a variety of sealants available, including silicone, latex, and polyurethane. Choose the one that is best suited for your specific needs and the climate in your area.

Step 6: Apply Sealant

Using a caulking gun, apply a generous amount of sealant to the gap between the window and frame. Be sure to fill the gap completely, but avoid overfilling as this can cause the sealant to expand and crack.

Step 7: Smooth Out Sealant

Smooth out the sealant with a caulk smoothing tool or your finger. This will help to ensure a smooth, even finish and prevent air from getting trapped in the sealant.

Step 8: Remove Excess Sealant

Wipe away any excess sealant with a damp cloth or paper towel. This will prevent the sealant from drying and hardening on the window or frame.

Step 9: Let it Dry

Allow the sealant to dry completely before opening or closing the window. This can take anywhere from a few hours to a full day, depending on the type of sealant and the climate.

Step 10: Check for Air Leaks

Once the sealant has dried, check for any air leaks around the window. Hold a flame or smoke source up to the window and watch for any movement or flickering, which indicates a leak.

Step 11: Seal any Remaining Gaps

If there are still gaps around the window, fill them with additional sealant or gap-filling material. Repeat steps 6-8 until all gaps are sealed.

Step 12: Maintain the Seal

To maintain the seal, inspect your windows regularly for signs of wear or damage. Repair any cracks or gaps as soon as they are noticed to keep your windows secure and energy-efficient.

Tips and Tricks

1. Choose the Right Sealant

Make sure you choose a sealant that is appropriate for the climate in your area and the type of window you are sealing. Some sealants work better in cold climates, while others are designed for warmer weather.

2. Work in Sections

To ensure a smooth finish and avoid overfilling, work in small sections when applying sealant. This will also make it easier to control the amount of sealant being applied.

3. Use Painter’s Tape

If you’re worried about getting sealant on your window frames, use painter’s tape to mask off the area around the gap. This will protect the frame while you apply the sealant.

4. Avoid Applying in Wet Conditions

Avoid applying sealant in wet conditions, as this can affect the bond and cause the sealant to shrink or crack.

5. Don’t Overfill the Gap

While it’s important to fill the gap completely, avoid overfilling as this can cause the sealant to expand and crack.

6. Smooth Out Sealant Quickly

Smooth out the sealant quickly before it dries to ensure a smooth, even finish.

7. Wait for Drying Time

Don’t open or close the window until the sealant has dried completely. This can take anywhere from a few hours to a full day, depending on the type of sealant and the climate.

8. Check for Air Leaks

Check for air leaks around the window by holding a flame or smoke source up to the window and watching for any movement or flickering.

9. Maintain Regularly

To keep your windows secure and energy-efficient, inspect them regularly for signs of wear or damage and repair any cracks or gaps as soon as they are noticed.

10. Consider Professional Help

If you’re unsure about how to reseal your windows or don’t have the tools or experience, consider hiring a professional to do the job for you.

Thanks for reading our article on how to reseal windows. We hope you found this information helpful and informative. By following these simple steps and tips, you can keep your windows secure and energy-efficient for years to come!

Advantages and Disadvantages of How to Reseal Windows


1. Energy Efficiency: Resealing windows can improve energy efficiency by reducing air leaks that cause draft and wasted energy.

2. Cost-Efficient: Repairing or resealing your windows can save money in the long run by reducing energy bills and avoiding costly window replacements.

3. Better Insulation: Resealing diminishes noise pollution and maintains a comfortable temperature indoors.

4. Eco-Friendly: By reducing energy consumption, resealing is an environmentally friendly solution.

5. DIY Project: Resealing windows is a simple do-it-yourself project that doesn’t require special tools or equipment.

6. Enhanced Home Value: Resealing windows makes your home more marketable by improving its energy efficiency and appearance.

7. Improves Air Quality: Resealing prevents dust, pollen, and other pollutants from sneaking inside, improving air quality.

8. Prevents Water Damage: Cracks and leaks in windows can cause water damage to walls and floors. Resealing them will prevent water from entering your home.

9. UV Protection: Resealing windows can block harmful ultraviolet radiation from entering your home, which can protect furnishings and carpets from sun damage.

10. More Comfortable Living Space: Resealing windows can create a more comfortable living space, with reduced noise and drafts.


1. Time Consuming: Resealing windows can be time-consuming, especially if you have a large number of windows to seal.

2. Temporary Solution: Resealing is a temporary solution and may need to be repeated from time to time, depending on the weather and usage.

3. Professional Help may be Required: If there is significant damage to the window, it may require professional help to repair or seal.

4. Money and Effort: Although resealing is less expensive than replacing windows, it still requires spending on products and effort.

5. Messy: Resealing can be messy and require cleaning up after the projects.

6. Frequent Inspection needed: Resealed windows need to be frequently monitored and inspected for signs of damage.

7. Wrong Material: If the wrong material is used for sealing, it can cause further damage or not work effectively.

8. Not all windows can be resealed: Some windows may be too worn or aged to be resealed, and replacing the window may be necessary.

9. Skill Required: Although resealing is an easy DIY project, it still requires a certain level of skill, especially when measuring and cutting

10. Safety Hazards: Resealing the windows can be hazardous, especially if the individual is not using appropriate safety gear and tools.


1. Why do windows need to be resealed?

Windows need to be resealed to prevent drafts, air leaks, and water leaks. Resealing also helps to maintain the energy efficiency of your windows.

2. How often should windows be resealed?

Windows should be resealed every two to three years, depending on the climate and exposure to the elements.

3. What materials are needed to reseal windows?

You will need a caulking gun, exterior grade silicone caulking, a scraper or putty knife, and a clean cloth or paper towel.

4. What is the best time to reseal windows?

The best time to reseal windows is during the dry and warm months of the year, typically in the spring or summer.

5. How do I know if my windows need to be resealed?

You can tell if your windows need to be resealed by checking for drafts, air leaks, or water leaks around the edges of the window frame or glass.

6. How do I prepare the window surface before resealing?

You should clean the window frame and glass with a damp cloth or sponge to remove any dirt, grime, or old caulking. Allow it to dry completely before resealing.

7. How should I apply the silicone caulking?

You should apply the silicone caulking in a continuous bead along the edge of the window frame or glass. Smooth the bead with your finger or a caulking tool to ensure a smooth and even seal.

8. How long does it take for the silicone caulking to dry?

The silicone caulking typically takes 24 hours to dry and cure completely. Avoid touching or disturbing the seal during this time.

9. How do I remove old caulking?

You can remove old caulking by using a scraper or putty knife to loosen and remove it. Clean the area with a damp cloth or sponge before reapplying new caulking.

10. Can I reseal windows myself or do I need to hire a professional?

You can reseal windows yourself as long as you feel comfortable and confident working with tools and materials. However, if you are unsure or have limited experience, it may be best to hire a professional.

11. Can resealing windows save me money on energy bills?

Yes, resealing windows helps to improve the energy efficiency of your home by preventing drafts and air leaks. This can lead to lower energy bills and a more comfortable living space.

12. How long does a resealing job last?

A resealing job can last up to two to three years, depending on the quality of the caulking and the climate. Regular maintenance and inspections can help prolong the lifespan of the seal.

13. Are there any safety precautions I need to take when resealing windows?

When resealing windows, it is important to wear protective gloves and eye goggles to prevent any injury from tools or materials. Additionally, use caution when climbing ladders or working on elevated surfaces.

How to Reseal Windows: Tips and Tricks for a Tight Seal

If you’re tired of cold drafts, leaks or high energy bills, resealing your windows could be the solution you need. Over time, the seals around your windows can crack, shrink or degrade, compromising the insulation of your home and allowing air and moisture to seep in. Fortunately, resealing your windows is a simple DIY project that requires only a few tools and materials, and can make a big difference in your comfort and savings. In this article, we’ll provide you with some tips and tricks on how to reseal windows like a pro.

Conclusion and Closing: Seal the Deal on Your Home’s Comfort

By now, you should have a clear idea of how to reseal windows and why it’s important for your comfort, health and wallet. Remember, resealing your windows is a low-cost, high-impact home improvement that can pay off in multiple ways, from reducing your heating and cooling bills to enhancing your indoor air quality, noise control and resale value. Whether you want to seal out the cold, the heat, the noise, the bugs or the pollen, there is a sealing solution that fits your needs and preferences, from foam tape and weatherstripping to caulking and glazing. So, don’t let your old, leaky windows bring you down – seal the deal on your home’s comfort and enjoy the benefits for years to come.

Thank you for reading this article on how to reseal windows. We hope you found it informative and helpful. If you have any questions, comments or feedback, please feel free to share them with us. We would love to hear from you and help you in any way we can. Until next time, stay cozy and energy-efficient!