3"x4" rectangular downspouts provide 12 square inches of flow capacity compared to 6 square inches for 2"x3" downspouts - double the water handling capacity. This makes them essential for commercial buildings, large residential properties, and any roof area over 600 square feet. The increased capacity prevents overflow during heavy rainfall and reduces the number of downspouts needed for large buildings.

Choose 10ft sections if you're in the Damascus, OR area for fewer seams and professional appearance. The 10ft sections are only available for local pickup/delivery due to shipping carrier length restrictions. Choose 8ft sections if you're outside our local area - they ship nationwide and provide the same quality and performance. Both can be cut to custom lengths on-site as needed.

You'll need heavy-duty 3"x4" rectangular downspout brackets (sold separately) installed every 4 feet maximum. Also required: outlet adapter for gutter connection, top elbow (typically 75°), bottom elbow, and extension. We offer complete accessory packages in matching colors. Professional installation is recommended for proper bracket placement and code compliance.

Use a power saw with a fine-tooth metal cutting blade for clean, straight cuts. Mark your cut line around the entire perimeter before cutting. Heavy-duty tin snips can work but require more effort and may not provide as clean a cut. Always deburr cut edges with a file for safety and proper fitting with connectors and elbows.

Yes, these commercial-grade 3"x4" downspouts meet or exceed most commercial building codes for water management systems. The heavy-duty 0.027" aluminum construction and high flow capacity make them ideal for commercial applications. Always verify local code requirements with your building department, as some areas may have specific requirements for commercial installations.

The bulk box (10 units) provides 15% savings over individual purchases, plus efficient job site delivery and storage. Professional contractors prefer bulk boxes for consistent material availability, reduced ordering frequency, and better project cost control. The packaging is designed for easy transport and organized storage on job sites.

Each 3"x4" downspout handles up to 1,200 square feet of roof area. Divide your total roof area by 1,200 to determine the minimum number needed. For commercial buildings, consider additional downspouts for redundancy and code compliance. Placement should be at building corners and every 40-50 feet along long walls for optimal performance.

While the downspouts themselves are designed for straightforward installation, working at height requires proper safety equipment and expertise. Professional installation is strongly recommended for safety, code compliance, and warranty protection. Professionals have the proper tools, insurance, and experience for safe, efficient installation that meets all local building codes.

We offer 25+ designer colors including White, Black, Musket Brown, various bronzes, and specialty colors like Colonial Blue and Forest Green. Choose colors that complement your building's exterior - neutral colors like White, Black, or Bronze work with most architectural styles. For commercial buildings, consider colors that match existing trim or architectural elements.

Unopened packages can be returned within 30 days in original packaging. A 15% restocking fee applies to all returns, and buyer is responsible for return shipping costs. For bulk orders, we work with contractors to ensure proper quantities before shipping. Defective products are replaced immediately at no charge. Contact us before returning to arrange proper handling.

Contact us directly at (503) 496-7017 for commercial project pricing and coordination. We offer special rates for large orders, can coordinate delivery timing, and provide technical support for proper sizing and color selection. Our commercial team handles everything from small multi-unit projects to large development contracts with custom packaging and delivery options.