Properly installed downspout extensions are crucial for directing water away from a building's foundation, preventing costly structural damage. In 2025, installation costs range from $150 to $500 per extension, depending on materials and complexity. This guide provides construction professionals with the knowledge to execute installations efficiently and effectively.
Utilize AI-driven tools to streamline your planning process. Capture roof dimensions, calculate runoff, and generate precise material lists. Stay competitive with real-time pricing from local suppliers.
Determine the discharge point, typically 4-6 feet from the foundation. Mark the extension length, accounting for connectors.
Remove the bottom elbow using a drill or rivet gun. Inspect for damage and replace if necessary.
Assemble the new elbow and extension on the ground, ensuring a slope of at least 1/8-inch per foot.
Slide the elbow into the downspout outlet, insert the extension, and fasten with screws to prevent separation.
Apply silicone around every connection to prevent leaks, even in buried sections.
Use a level to check the slope. Direct surface extensions onto a splash block or transition underground to a dry-well.
Ensure extensions are at least 4 feet long to prevent foundation washout. Use blueprint overlays to avoid negative slopes and specify hidden straps to support runs.
Combine gutter upgrades with other renovations for a seamless client experience. Bundling tasks can improve acceptance rates significantly.
Surface Extensions
Buried Extensions
Stay informed about local drainage codes to avoid legal issues. Use updated databases to ensure compliance.
Leverage AI tools to reduce estimating time and material waste. Provide clients with transparent pricing and faster project completion.
Enhance your construction projects with expert downspout extension installations. Visit CountBricks.com for more resources and tools.
A historic bungalow faced basement moisture issues. Traditional bids varied, but with CountBricks, the contractor achieved clarity quickly.
Site notes captured square footage and downspout count. A low spot was identified, recommending two 10-foot buried extensions.
The estimate totaled $1,180, aligning closely with the final spend.
Installation was completed in one day. Moisture levels dropped significantly, and the client left a five-star review.
CountBricks' blend of AI and best practices turns small fixes into showcase wins. Use our platform to enhance your next project.
Explore our solutions at CountBricks.com or book a consultation to elevate your estimates.
