By The Roofing Brief Team. Last reviewed: October 2026.
Half round gutter installation hangs a U-shaped trough below the roof edge using either exposed external brackets or hidden internal hangers with tension rods, spaced no more than 32 to 36 inches on center and pitched about 1/16 inch per foot toward the outlet, per the RHEINZINK half round gutter guide specification. The install is more exacting than K-style: the hangers show, the facing style dictates which hanger you can use, and copper systems demand copper, brass or stainless fasteners. Modernize’s August 2026 cost guide puts half round at about $28.80 per linear foot installed on average, within a $13.34 to $44.25 range.
The parts that trip people up on a half round job are the hanger choice (hidden or external), matching the hanger to the gutter facing, the 32 inch fascia versus 36 inch roof-strap spacing limits, and the metal-compatibility rules that keep a copper system from corroding its own fasteners. For the K-style-versus-half-round decision itself, see our K-style vs half-round comparison. For a general install with sizing and downspout math, see the rain gutter installation guide.
What makes half round gutter installation different from K-style?
Half round installation differs from K-style in three ways that change the job: the hangers are usually visible so spacing has to be exact, the gutter facing (single-bead or double-bead) limits which hangers work, and the profile carries less water per size so pitch and outlet placement matter more. HomeGuide’s 2026 gutter installation guide prices that extra work at $1 to $2 more per linear foot than K-style.
A half round gutter is an open U-shaped trough with a rolled bead on the front lip, sold by Berger in 5, 6, 7 and 8 inch widths in 16 oz and 20 oz copper, aluminum and 26 gauge steel. Because the front lip is a smooth curve rather than the ogee face of K-style, most hanger hardware clamps over that lip or reaches across the trough with a rod, and much of it stays in view. Uneven hangers or a wandering line read as a defect from the ground. Compare the two profiles side by side in our K-style and half-round dimensions spec sheet.
Half round also holds less water than a same-width K-style, because the round bottom gives a shallower cross-section. Modernize’s half-round guide gives a rule of thumb of 5-inch half round for roofs under 2,500 square feet and 6-inch for roofs up to 3,800 square feet, with 7 or 8 inch for larger roofs or heavy rain. Check the profile against your roof area in our gutter sizing guide before you buy.
Half round gutter specs: sizes, metals and hanger limits
| Spec | Value | Source |
|---|---|---|
| Widths | 5, 6, 7, 8 in | Berger half round catalog page |
| Metals and thickness | Copper 16 oz and 20 oz; aluminum 0.027 and 0.032 in; steel 26 ga | Berger |
| Fascia bracket spacing | Not to exceed 32 in on center | RHEINZINK guide spec 07 71 23 |
| Roof-strap hanger spacing | Not to exceed 36 in on center | RHEINZINK guide spec 07 71 23 |
| Copper gutter brackets | 30 in O.C. max in snow areas, 36 in in non-snow areas | Copper Development Association, Copper in Architecture Design Handbook |
| Pitch | 1/16 in per ft minimal pitch; 1/4 in per 10 ft on the zinc hanger system | RHEINZINK |
| Section lap | 3/8 in shingle lap in the direction of flow | RHEINZINK |
| Longest soldered straight run | 49 ft unrestrained, with expansion provision within 25 ft of any fixed end | RHEINZINK |
| Hanger height | Top of the front bead aligned with the projected roof plane so snow slides past | RHEINZINK |
Half round gutter hangers: hidden vs external brackets
Half round gutters use one of two hanger families: external brackets that wrap the outside of the trough and screw to the fascia at up to 32 inches on center, or hidden internal hangers that sit inside the trough with a tension rod spanning to the back edge. External brackets suit single-bead gutter and give a traditional look; internal hidden hangers need double-bead gutter and leave a cleaner face. RHEINZINK’s spec covers three support systems (snap-lock bracket on a mounting rail, fascia hanger, and roof-strap hanger), each with its own spacing limit.
| Hanger type | Where it mounts | Gutter facing required | Best for |
|---|---|---|---|
| External fascia bracket | Wraps outside trough, screws to fascia | Single-bead or double-bead | Traditional look, straight sound fascia |
| Hidden internal hanger with rod | Inside trough, rod to back bead, screw to fascia | Double-bead only | Cleaner face, heavy copper or steel |
| Roof-mount strap hanger | Under shingles or over roof deck to trough | Single-bead or double-bead | Rotten or absent fascia, exposed rafter tails |
| Adjustable-pitch bracket | Fascia, extended shank | Single-bead or double-bead | Angled or non-plumb fascia |
Single-bead vs double-bead facing
Gutter facing describes how the front and back edges of a half round are rolled. Single-bead has a bead only on the front lip; double-bead adds a bead to the rear edge so an internal hanger’s rod has something to hook. If you plan to use hidden internal hangers, order double-bead gutter in the same 5 or 6 inch width as the hangers. Ordering single-bead and then trying to fit internal hangers is the most common half round buying mistake.
How far apart do half round gutter hangers go?
Space half round gutter hangers no more than 32 inches on center for fascia brackets and 36 inches for roof-strap hangers, the limits in RHEINZINK’s guide specification, and tighten to 24 to 30 inches in snow and ice climates or for heavy copper. The Copper Development Association handbook shows copper gutter brackets at 30 inches maximum in snow areas and 36 inches elsewhere. Place a hanger within a few inches of every joint, outlet, and end cap where the load concentrates. For a per-length count across gutter types, see how many gutter hangers per 10 ft.
| If your job is | Space hangers at | Why |
|---|---|---|
| Aluminum half round, fascia bracket, no snow | 32 in O.C. max | RHEINZINK fascia bracket limit |
| Roof-strap hangers on exposed rafter tails | 36 in O.C. max, or at each rafter tail | RHEINZINK strap hanger limit |
| Copper half round in a snow area | 30 in O.C. max | CDA handbook detail for snow areas |
| Heavy ice, tall trees, or 20 oz copper | 24 in O.C. | Shorter spans per hanger under load |
| A 40 ft run at 32 in spacing | 16 hangers (40 x 12 / 32 = 15, plus one end) | Worked count; add one at each joint |
- Mark a chalk line for the slope. Snap a line along the fascia dropping about 1/16 inch per foot toward the downspout outlet. A 40-foot run drops 2.5 inches end to end.
- Mark hanger positions. Step off 24 to 32 inches on center along the line so spacing is even and the visible hangers stay straight.
- Set the end and outlet hangers first. These anchor the run and locate the drop; the field hangers fill between them.
- Fasten into sound wood. RHEINZINK calls for screwing through the fascia into rafter tails or blocking, so the screw must pass a 3/4 inch 1x fascia board and bite the framing behind it.
Fascia mount vs roof mount: which for half round?
Fascia mounting is the default for half round and keeps the gutter independent of the roofing, so you can reroof without disturbing the gutters. Roof mounting, using strap hangers that run under the shingles or over the deck at up to 36 inches on center (RHEINZINK), is the fallback when the fascia is rotten, too thin, or absent behind exposed rafter tails. For exposed rafter tails, the same spec screws the straps to the sides of the tails.
Before either, inspect the fascia. A hanger is only as strong as the board behind it, and gutters that overflow or sit wrong rot the very fascia the hangers are screwed into. If the board is soft, fix it first; see the causes and repair costs in our guide to fascia rot from gutters. On angled fascia, use adjustable-pitch brackets with an extended shank and dial each one until the trough sits level front to back. On a plumb fascia, hidden-hanger half-round systems often add half-round gutter wedges, one per hanger (16 on a 40 foot run at 32 inch spacing), so the round bottom does not tip under water and ice load.
How to install half round gutters step by step
Installing half round gutters follows a fixed sequence: measure and slope, mount hangers, cut and join sections, set the outlet and downspout, then seal or solder the joints. The hangers establish the line every other part hangs from, so work from the high end toward the outlet at a steady 1/16 inch per foot. For the full timeline and what can go wrong on any gutter job, see our gutter installation guide.
- Measure and mark the slope. Snap the pitched chalk line at about 1/16 inch per foot toward the drop.
- Install hangers. Set end, outlet, and field hangers at 24 to 32 inches on center into sound wood.
- Cut sections to length. Cut half round with a fine-tooth blade or shears; deburr the edges so joints seat clean.
- Join sections. Lap seams 3/8 inch in the direction of flow (RHEINZINK). On aluminum and steel, rivet and seal; on copper or zinc, solder the seams.
- Allow for expansion. On soldered runs, RHEINZINK limits straight unrestrained runs to 49 feet and calls for an expansion joint within 25 feet of any fixed end.
- Set the outlet and downspout. Cut the outlet hole at the gutter low point and fit the drop outlet; the CDA handbook limits each downspout to 50 feet of gutter. Plan drops using our downspout placement and sizing guide.
- Fit end caps and seal. Crimp or solder end caps, then hose-test the run for ponding at the outlet.
Installing copper half round gutters: galvanic and solder rules
Copper half round installation adds two rules that do not apply to aluminum: use only copper, brass, bronze or stainless steel fasteners, and solder the joints rather than sealing them. The Copper Development Association handbook explains why: in contact with a less noble metal and rainwater, copper is not harmed, but it corrodes the other metal, and aluminum and zinc (including galvanized and zinc-plated screws) are the main concern. Sealant-only joints on copper eventually leak, so a proper copper system is soldered watertight.
Keep aluminum flashing and galvanized hardware out of direct contact with the copper, or separate them with gaskets or a compatible paint, as the CDA handbook describes. Soldering needs flux, a copper-specific solder, and a torch or heavy iron; it is the step most homeowners hand to a pro, and it is why copper labor runs higher. Copper half round costs $25 to $40 or more per linear foot installed in HomeGuide’s 2026 figures, and HomeGuide lists copper’s typical lifespan at 50 to 100 years; see how it compares in our gutter materials comparison.
Half round gutter installation cost in 2026
Half round gutter installation averages about $28.80 per linear foot, within a $13.34 to $44.25 range, per Modernize’s half-round guide updated August 12, 2026. HomeGuide’s gutter installation cost guide prices the half round style at $1 to $2 per linear foot more than K-style, on top of a material price that runs from $10 to $20 for aluminum to $25 to $40 or more for copper.
| Material | Installed cost per linear foot | 200 ft total | Notes | Source |
|---|---|---|---|---|
| Half round, all materials (average) | $28.80 average ($13.34 to $44.25) | About $5,760 | National average across metals | Modernize, Aug 2026 |
| Aluminum | $10 to $20, plus $1 to $2 for half round | $2,200 to $4,400 | Sealed and riveted joints, lightest option | HomeGuide 2026 |
| Steel | $10 to $35, plus $1 to $2 for half round | $2,200 to $7,400 | Heavier; 26 ga on Berger’s line | HomeGuide 2026 |
| Copper | $25 to $40+, plus $1 to $2 for half round | $5,200 to $8,400+ | Soldered joints, copper or stainless fasteners | HomeGuide 2026 |
| Zinc | $35 to $45, plus $1 to $2 for half round | $7,200 to $9,400 | Soldered; RHEINZINK spec limits | HomeGuide 2026 |
Hanger hardware follows the gutter metal: copper or brass hangers on copper, never zinc-coated brackets. For a full profile-by-profile price picture, see our gutter cost per linear foot breakdown and the wider 2026 gutter prices report.
Common half round installation mistakes
The recurring half round mistakes are ordering the wrong facing for your hangers, spacing hangers past the 32 to 36 inch limits, pitching less than about 1/16 inch per foot, and mixing metals on copper. Each one shows up months later as a sag, an overflow, or corroded hardware. Most are cheap to avoid at buying and layout time and expensive to fix after the run is up. Learn to spot the warning signs early in our guide to incorrect gutter installation.
- Single-bead gutter with internal hangers. Internal hidden hangers need double-bead facing; order the right one up front.
- Hangers too far apart. Beyond 32 inches on fascia brackets the trough can sag under ice; drop to 24 to 30 inches in snow country.
- Flat or reversed pitch. Without about 1/16 inch per foot toward the outlet, water stands and overflows the low points.
- Galvanized screws on copper. Copper corrodes the zinc coating; use copper, brass or stainless only (CDA).
- Hangers in rotten fascia. Soft wood lets the whole run drop; probe and repair the board first.
Frequently asked questions
How far apart should half round gutter hangers be?
Space half round gutter hangers no more than 32 inches on center for fascia brackets and 36 inches for roof-strap hangers, per RHEINZINK’s guide specification, and tighten to 24 to 30 inches in snow and ice climates or for heavy copper. The Copper Development Association shows copper gutter brackets at 30 inches maximum in snow areas. Add a hanger within a few inches of every joint, outlet, and end cap.
What is the difference between hidden and external half round hangers?
External brackets wrap the outside of the trough and screw to the fascia at up to 32 inches on center (RHEINZINK), giving a traditional look and working with single-bead or double-bead gutter. Hidden internal hangers sit inside the trough with a rod that hooks the rear bead, so they require double-bead facing and leave a cleaner face. The hanger you can use depends on the gutter facing you order.
Do half round gutters mount to the fascia or the roof?
Half round gutters usually mount to the fascia, which keeps them independent of the roofing so you can reroof without disturbing them. Roof-mount strap hangers, run under the shingles or over the deck at up to 36 inches on center, are the fallback when the fascia is rotten, too thin, or absent behind exposed rafter tails. Fascia mounting is easier to service and the default choice.
Can I install copper half round gutters myself?
You can hang copper half round gutters yourself, but the joints should be soldered rather than sealed, which needs flux, copper solder, and a torch or heavy iron. Use only copper, brass or stainless steel fasteners, since copper corrodes aluminum and zinc-coated hardware it touches, per the Copper Development Association. Many homeowners install the hangers but hire out the soldering, which is why copper labor costs more.
How much does half round gutter installation cost?
Half round gutter installation averages about $28.80 per linear foot, within a $13.34 to $44.25 range, per Modernize’s August 2026 guide. HomeGuide prices the half round style at $1 to $2 per foot more than K-style, with aluminum at $10 to $20 and copper at $25 to $40 or more per linear foot installed.
What slope do half round gutters need?
Half round gutters need a slope of about 1/16 inch per foot pitched toward the downspout outlet so water drains instead of standing, the minimal pitch in RHEINZINK’s guide specification. Over a 40-foot run that is 2.5 inches of drop end to end. Snap a pitched chalk line before setting hangers, and water-test the finished run with a hose to confirm it drains with no ponding.