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Fixing Leaky Gutter Corners: A Step-by-Step Guide

Understanding the Problem of Leaky Gutter Corners

Gutter systems are integral to directing water away from your home's foundation, preserving its structural integrity. However, gutter corners tend to be vulnerable to leaks because they are points where different sections of the gutter system meet. The leaks can be a result of various causes such as clogging, incorrect installation, normal wear and tear, or sealant degradation. Before you begin fixing leaky gutter corners, it's essential to identify the source of the leak to address it effectively.

Materials and Tools Needed

Before you start, make sure you have the following materials and tools at hand:

  • Ladder
  • Gloves
  • Gutter sealant
  • Caulk gun
  • Chisel or Putty knife
  • Wire brush or abrasive pad
  • Clean rags or towels
Proper preparation will ensure a smooth repair process, so gather these items before you begin.

Step-by-Step Guide to Fixing Leaky Gutter Corners

Step 1: Safety Precautions

Prior to starting any work, take the necessary safety precautions. Use a ladder safely by placing it on stable, level ground and having someone spot you if possible. Always wear gloves to protect your hands from sharp edges.

Step 2: Cleaning the Gutter Corner

Clean out any debris from the gutter corner, such as leaves or twigs that could be causing obstructions. Once you've removed larger debris, use a wire brush or an abrasive pad to scrub the area clean, especially focusing on where the sealant will be applied.

Step 3: Removing Old Sealant

With a chisel or putty knife, carefully remove any old or failing sealant from the leaky corner. Ensure all the old sealant is scraped away to enable the new sealant to adhere properly.

Step 4: Preparing the Surface

After removing the old sealant, further prepare the surface by cleaning it with a rag. The corner should be completely dry and free of any remaining dust or debris.

Step 5: Applying New Sealant

Load the gutter sealant into your caulk gun and apply a generous amount to the inside of the gutter corner, ensuring you cover any gaps or holes that could be causing the leak. Apply the sealant smoothly and steadily; if you do miss a spot, you can always apply more sealant.

Step 6: Smoothing the Sealant

After the sealant is applied, use your finger or a putty knife to smooth it out. This helps to create a watertight seal and ensures that it bonds correctly to the gutters. Be sure to work the sealant into any small gaps or crevices.

Step 7: Checking for Leaks

Once the sealant has been smoothed and is set according to the manufacturer's instructions, check for leaks by running water through the gutter. This can be done with a garden hose or by waiting for rainfall. Notice if any water still escapes from the corners and address those areas if needed.

Step 8: Regular Gutter Maintenance

To prevent future leaks, routine maintenance is crucial. Regularly cleaning out your gutters and inspecting them for signs of damage can prevent issues before they become serious. Additionally, check and touch up the sealant in all corners and joints at least once a year.


Fixing leaky gutter corners is an important part of home maintenance that can prevent more significant issues such as water damage to your home’s foundation or landscape erosion. By following this step-by-step guide, homeowners can effectively address leaks and preserve the longevity of their gutter system. Remember, the key to a successful repair is proper cleaning and preparation of the surface before applying a new layer of sealant. With the right approach, you can ensure your gutters continue to function correctly throughout the year.

Protect your home today: Schedule your $99 gutter cleaning with a free maintenance check!
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