Custom Downspouts in Mississippi.
Standard downspouts undersize your home's drainage capacity. Oversized and decorative profiles for high-volume runoff and architectural homes.
Mon–Fri 8AM–5PM · 14 Mississippi cities served
Custom Downspouts in Mississippi: Stop the Overflow
Standard downspouts undersize your home's drainage capacity — and overflow during the heavy rains Mississippi gets every spring. Dun-Rite installs custom-sized downspouts including round profiles for traditional homes, oversized 3x4 and 4x5 rectangulars for high-volume runoff, and decorative copper downspouts for architectural homes. We also handle underground drainage tie-ins to direct water away from foundations and landscaping.
How Do You Size Downspouts for a Home?
three profiles, three capacities| Profile | Roof Area Per Spout | Best For | Cost / LF Installed |
|---|---|---|---|
| 2x3 Standard | ~600 sq ft | Small homes, garages, low-slope roofs | $5–$8 |
| 3x4 Oversized | ~1,200 sq ft | Most Mississippi residential homes (recommended) | $8–$12 |
| 4x5 High-Flow | ~2,000+ sq ft | Commercial, large estate homes, low-pitch rooflines | $12–$18 |
Most Mississippi homes built in the last 30 years came with 2x3 downspouts that are simply too small for the roof area they drain. The result: overflow at gutter corners during heavy rain, splashback against the foundation, and washout in flowerbeds below. Upgrading to 3x4 oversized typically costs $300–$700 across a full home and solves chronic overflow problems immediately.
What Profile Options Are Available?
Round
Traditional rounded profiles for historic and architectural homes. Available in 3-inch and 4-inch diameters in aluminum or copper.
Rectangular
Standard 2x3, oversized 3x4, and high-flow 4x5 rectangular profiles. The Mississippi residential standard. Most cost-effective.
Decorative Copper
Hand-fabricated copper downspouts with optional decorative endcaps, ornamental brackets, and rainwater scuppers. Specialty work.
Do You Offer Underground Drainage Tie-Ins?
Yes. Underground drainage tie-ins move water from your downspouts to a daylight discharge point well away from the foundation — typically 15–40 feet from the house. This is the right solution where splash blocks alone aren't enough: high-runoff downspouts, low-grade lots, basement homes, and any location where chronic foundation moisture is a concern.
We use 4-inch corrugated or smooth PVC pipe, hand-trenched or machine-trenched depending on landscape disruption tolerance. Pipe terminates at a daylight discharge, French drain, or popup emitter. Cost typically runs $300–$800 per drainage run depending on length and trenching access.
Can You Add Downspouts to Existing Gutters?
Yes — and it's one of the most cost-effective upgrades to a Mississippi home. Adding a downspout where overflow keeps happening typically costs $150–$400 depending on length and tie-in, and immediately solves the chronic overflow problem. We don't have to replace gutters to add downspouts; we just cut the gutter outlet and tie in.
Common scenarios: long roof runs without enough downspouts (homes built with corner-only spouts often need a mid-run added), upgrading from 2x3 to 3x4 on an oversized roof footprint, or adding a downspout to handle runoff from a new addition or sunroom.
How Do You Handle Splash Blocks and Extensions?
Where underground drainage isn't appropriate or budget allows surface discharge, we install splash blocks and downspout extensions. The goal is the same: get water at least 4–6 feet from the foundation and direct it away from landscape beds where it can cause erosion.
Splash blocks come in concrete (most durable), polymer (lightweight, attractive), or decorative cast options for architectural homes. Downspout extensions can be fixed (a 4-foot rigid section of downspout) or flip-up/roll-out style (folds down during rain, retracts when dry to keep landscape clean).
We bring options to every estimate so you can pick the surface or underground solution that matches your property and budget.
From Sizing to Installed.
most retrofit jobs in a single visitOn-Site Sizing & Placement
Measure roof area, evaluate runoff load, and identify ideal downspout placement to direct water away from foundation and landscaping.
Profile & Color Selection
Choose round, rectangular, or oversized profiles. Color-match to existing gutter system or fabricate copper specialty options.
Fabrication & Installation
Custom-cut downspouts on-site, sealed top connections, color-matched straps every 6 feet, and splash blocks or underground tie-ins as specified.
Drainage Tie-In + Walkthrough
Install underground drainage where required. Final water-flow test, splash block placement check, and warranty paperwork delivered.
Custom Downspout Questions.
Standard 2x3 downspouts handle about 600 sq ft of roof area each — undersized for most Mississippi homes. We typically install 3x4 oversized for residential (handles ~1,200 sq ft per spout) and 4x5 for high-flow commercial properties. Sizing depends on roof area, pitch, and downspout placement frequency. We calculate this on every estimate.
Yes. Adding downspouts to existing gutters is a common job — typically $150–$400 per added spout depending on length, profile, and underground tie-ins. We often add downspouts when homeowners discover overflow at corners during heavy rain. Existing gutter must be in good condition.
Yes. Underground drainage runs (typically 4-inch corrugated PVC or smooth pipe) carry water from downspouts well away from the foundation, then exit at a daylight discharge point or French drain. Common run lengths are 15–40 feet; cost runs $300–$800 per run depending on length and trenching difficulty.
Yes. We fabricate round, rectangular, and decorative copper downspouts to match copper gutter installations or as standalone accent pieces. Copper downspouts run $40–$80 per linear foot installed depending on profile and decorative detail. See our copper gutter page for the broader specialty.
Last Updated: May 2026
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