Box 6" Gutter — Sizing & Cost Guide
The box 6-inch gutter provides strong water-handling capacity of 7,600 square feet at 1 inch per hour in a modern rectangular profile. It is a popular choice for commercial buildings, flat-roofed structures, and contemporary homes. The square profile allows it to blend seamlessly with parapet walls and flat fascia treatments. Box gutters at this size are frequently used in conjunction with internal drainage systems on commercial buildings.
Box 6" Specifications
Available Materials
Maximum Roof Area by Rainfall Intensity
The table below shows the maximum effective roof area (in square feet) that the Box 6" gutter can drain at various rainfall intensities. The capacity of 7,600 square feet is rated at 1 inch per hour. At higher rainfall intensities, the maximum serviceable roof area decreases proportionally because more water enters the gutter per unit of roof area. Use your local rainfall intensity (available on the states page) to determine if this profile is adequate for your home.
| Rainfall Intensity | Max Effective Roof Area | Typical Home Size |
|---|---|---|
| 1 in/hr | 7,600 sq ft | Large home or commercial |
| 1.5 in/hr | 5,066 sq ft | Large home or commercial |
| 2 in/hr | 3,800 sq ft | Large home or commercial |
| 2.5 in/hr | 3,040 sq ft | Large home or commercial |
| 3 in/hr | 2,533 sq ft | Standard two-story home |
| 3.5 in/hr | 2,171 sq ft | Standard two-story home |
| 4 in/hr | 1,900 sq ft | Small to medium home |
| 4.5 in/hr | 1,688 sq ft | Small to medium home |
Cost Estimate for Box 6"
The cost of Box 6" gutters ranges from $14 to $24 per linear foot for materials. This price range reflects variations in material thickness, finish options, and regional availability. Professional installation typically adds $3 to $8 per linear foot depending on the height of the building, accessibility, and local labor rates. The table below shows estimated material costs for common gutter run lengths. Total installed cost including downspouts, hangers, end caps, and labor is typically 2 to 3 times the material cost.
| Gutter Run | Material Cost (Low) | Material Cost (High) |
|---|---|---|
| 80 ft | $1,120 | $1,920 |
| 100 ft | $1,400 | $2,400 |
| 120 ft | $1,680 | $2,880 |
| 150 ft | $2,100 | $3,600 |
| 200 ft | $2,800 | $4,800 |
| 250 ft | $3,500 | $6,000 |
| 300 ft | $4,200 | $7,200 |
box Profile Details
Box gutters feature a clean rectangular cross-section that complements contemporary and modern architectural styles. The straight lines and geometric form work well with flat-roofed buildings, commercial structures, and minimalist residential designs. Box gutters can be integrated into the roof structure behind parapet walls for a completely hidden drainage system. They are available in a range of materials including aluminum, galvanized steel, stainless steel, and copper.
When selecting the Box 6" gutter for your project, consider the total effective roof area draining to the gutter system, the local rainfall intensity for your area, and the number and placement of downspouts. A general rule is to keep the capacity utilization below 75 percent of the rated maximum to provide a safety margin for storms that exceed the design intensity. For homes in areas with frequent heavy rainfall or large roof areas, upgrading to the next larger size within the same style family is a worthwhile investment that adds minimal cost but significantly reduces the risk of overflow during extreme weather events.
Proper installation is critical to gutter performance regardless of the profile selected. Gutters should be sloped toward the downspouts at a rate of approximately 1/16 inch per foot to ensure water flows to the outlets rather than pooling in the gutter. Hanger or bracket spacing should not exceed 36 inches, and many professionals recommend 24-inch spacing for durability and to prevent sagging under water and ice loads. All joints, end caps, and corners should be sealed with high-quality gutter sealant, and downspout connections should be secured with rivets and sealed to prevent leaks at the transitions.
State Compatibility for a Typical 2,000 sq ft Home
For a typical 2,000 square foot home with a 4/12 roof pitch (effective area of approximately 2,100 sq ft), the Box 6" gutter is adequate in 46 states and insufficient in 5 states based on the 1-hour, 10-year storm rainfall intensity. States where this profile is adequate are shown in green; states requiring a larger gutter are shown in red. For borderline cases, adding more downspouts or upgrading to the next size provides an appropriate safety margin.
Other Gutter Profiles
Compare the Box 6" with other gutter profiles to find the best match for your project. Each profile offers different trade-offs in capacity, appearance, cost, and material availability.