How To Turn A Corner With A Downspout

Understanding Downspout Corner Adaptations

Redirecting water flow effectively from gutters requires strategic use of downspouts and their associated components. Navigating corners necessitates a planned approach, considering both aesthetics and functionality. This article outlines accepted methods for achieving clean and efficient downspout corner transitions.

Necessary Materials and Tools

Successful downspout corner adaptation hinges on having the right materials and tools. Common requirements include:

• Downspout Elbows: Available in various angles (e.g., 45-degree, 75-degree, 90-degree) and materials (aluminum, vinyl, copper). Material choice should match existing downspout composition.
• Downspout Extensions: Straight sections of downspout used to bridge distances. Length is determined by the specific installation needs.
• Screws or Rivets: For securely fastening downspout sections. Opt for self-tapping screws designed for metal if working with aluminum or galvanized steel. Rivets require a rivet gun.
• Downspout Straps or Brackets: Used to attach the downspout to the building’s exterior wall. Spacing recommendations typically suggest one strap every 6-8 feet, with additional support near corners.
• Sealant: A waterproof sealant to prevent leaks at connection points. Silicone or polyurethane-based sealants are commonly used.
• Measuring Tape: Precise measurements are crucial for accurate cuts and proper alignment.
• Tin Snips or Metal Cutting Saw: For cutting downspout sections to the required length.
• Drill (if using screws): A power drill is necessary for pre-drilling pilot holes and installing screws.
• Rivet Gun (if using rivets): Required to set rivets and create permanent connections.
• Safety Glasses and Gloves: Essential for personal protection during the cutting and installation process.

Downspout Elbow Selection and Placement

Choosing the correct downspout elbow is paramount. The angle of the elbow must correspond to the angle of the corner being navigated. Avoid forcing elbows into positions that exceed their intended flex; this can cause deformation and compromise water flow. Combining multiple elbows of smaller angles may be necessary for complex bends.

Determining the Required Offset

Calculate the exact distance the downspout needs to be offset from the wall. This measurement dictates the length of the downspout extensions required between the elbows. Accurate measurement minimizes wasted material and ensures a neat, professional appearance. Consider the architectural features of the building (e.g., protruding window sills, landscaping) when determining offset.

Example: If the downspout needs to be moved 12 inches away from the wall, and two 45-degree elbows are used, a section of downspout will need to connect the two elbows and provide the 12-inch offset. Consult geometry for precise calculations, ensuring that the sum of the horizontal projections of all downspout sections equals the total offset distance.

Installation Procedures

Once the materials are gathered and measurements taken, the installation process can begin. The following steps outline a general approach.

Cutting Downspout Sections

Use tin snips or a metal cutting saw to cut downspout sections to the calculated lengths. Ensure cuts are straight and clean. Burr removal is critical; use a file or deburring tool to smooth any sharp edges. Incorrect cuts lead to gaps and potential leaks. Safety glasses are essential during this stage.

Assembling the Corner Configuration

Dry-fit all components (elbows and downspout extensions) to verify proper fit and alignment before permanently fastening them. This allows for adjustments before committing to a specific configuration. Rotate elbows to achieve the desired angle and offset.

Secure the downspout sections using screws or rivets. Pre-drilling pilot holes with a drill bit slightly smaller than the screw diameter will prevent the material from splitting or deforming. If using rivets, ensure the rivet gun is compatible with the rivet size and material. Apply sealant at all connection points to create a watertight seal. Excess sealant should be wiped away for a clean finish.

Attaching the Downspout to the Wall

Secure the downspout assembly to the building's exterior wall using downspout straps or brackets. Space the straps evenly, as previously indicated, providing sufficient support. Ensure the straps are securely fastened to the wall using appropriate screws or anchors based on the wall material (wood, brick, siding). Over-tightening screws can damage the downspout or the wall. The downspout must be plumb (vertically aligned) for optimal water flow. Use a level to verify vertical alignment during installation.

Proper installation is critical for preventing water damage to the building's foundation. Ensure that the downspout discharges water away from the foundation wall and into a designated drainage area.

Addressing Potential Problems

Several issues may arise during the downspout installation process. Identifying and addressing these problems promptly is crucial.

Leaks at Connection Points

Leaks commonly occur at the joints between downspout sections and elbows. Thoroughly inspect all connections for gaps or inadequate sealant application. Reapply sealant if necessary, ensuring that all surfaces are clean and dry before application. Consider using a sealant specifically designed for gutter and downspout systems. Re-secure the connections with screws or rivets if necessary.

Downspout Detachment

Downspouts may detach from the wall due to insufficient support or improper fastening. Inspect the downspout straps or brackets for damage or loose screws. Replace damaged straps and re-secure loose screws. Consider adding additional straps for increased support, especially in areas prone to high winds. Ensure that the straps are properly anchored to the wall structure.

Clogging

Downspouts can become clogged with debris, such as leaves, twigs, and dirt, hindering water flow. Install gutter guards to prevent debris from entering the gutter system in the first place. Regularly inspect and clean the gutters and downspouts to remove any accumulated debris. A garden hose with a high-pressure nozzle can be used to flush out the downspout. Consider installing a downspout screen at the bottom of the downspout to catch debris before it reaches the drainage area.

Material Compatibility

Mixing dissimilar metals (e.g., aluminum and copper) can lead to galvanic corrosion, which can weaken the downspout system over time. Use downspout components made of the same material or materials that are compatible with each other. If dissimilar metals must be used, consider applying a protective coating to prevent direct contact between the metals.

Alternative Cornering Techniques

While elbows are the most common method for turning a corner with a downspout, other techniques exist:

• Flexible Downspout Extensions: These corrugated or flexible pipes offer greater flexibility in navigating complex corners but may be less aesthetically pleasing than traditional elbows.
• Custom-Bent Downspouts: Fabricated by professionals, these downspouts offer a seamless and custom-fit solution but are generally more expensive.
• Chains: In some scenarios, a rain chain can be used in place of a downspout. Though not ideal for heavy rainfall, a chain offers a decorative alternative to traditional downspouts, directing water to a specific ground location.

Conclusion: Key Takeaways

Effectively turning a corner with a downspout involves careful planning, accurate measurements, and proper installation techniques. Key considerations include:

• Choosing the correct downspout elbows and extensions based on the corner angle and required offset.
• Ensuring secure connections with screws or rivets and applying sealant to prevent leaks.
• Providing adequate support with downspout straps or brackets.
• Addressing potential problems such as leaks, detachments, and clogging promptly.
• Considering alternative cornering techniques for specific situations.

By following these guidelines, a durable and aesthetically pleasing downspout system can be achieved, protecting the building from water damage.