ESTIMATOR · BOISE & TREASURE VALLEY
Half-Round Gutters Cost Calculator in Boise & the Treasure Valley
Half-round gutter installation is priced per linear foot like K-style, with a 20–50% profile premium (multiplier set automatically when you open the calculator). Material choice (aluminum vs copper) is the biggest variable beyond that.
The calculator below opens with the half-round profile multiplier already applied. Example project profiles cover both aluminum and copper half-round at common sizes.
WHAT YOU’LL GET
A ranged half-round gutters estimate, in under a minute.
Low / typical / high
Three figures, not one. We never publish exact prices — every home is different.
Pricing variables shown
The calculator shows what assumptions produced your number so you can adjust them.
On-site quote next
Real quotes require an on-site visit. The calculator is for budgeting before that call.
COST DRIVERS
What drives the cost of half-round gutters.
Half-round gutter installation is priced per linear foot, similar to K-style seamless, with adjustments for profile size, material (aluminum vs. copper), downspout configuration, and story count. Copper half-round is priced at the copper rate — typically 3 to 5 times aluminum. Our cost calculator provides a baseline range for gutter installation; contact us for a profile-specific quote on half-round systems.
Material (aluminum vs copper)
Aluminum half-round is priced like seamless K-style with a small profile premium. Copper half-round runs at the copper rate — 3–5× aluminum.
Profile size (4, 5, or 6-inch)
5-inch half-round is standard for most Treasure Valley homes with this profile. 4-inch suits historic cottage roof areas; 6-inch handles larger custom homes and high-debris exposure.
Aluminum gauge or copper weight
.027-gauge is standard aluminum, .032 for wider spans. Copper choice is 16oz residential or 20oz premium-gauge for long runs.
Round corrugated downspouts
Round downspouts pair with half-round gutters and cost slightly more than rectangular K-style downspouts. We size diameter to the roof area each run drains.
Hanger type
Half-round uses fascia brackets or profile-specific hangers, not K-style hidden hangers. The correct hardware costs more per piece and is set at tighter spacing.
Joint sealing or soldering
Aluminum half-round uses butyl-sealed slip-connector miters. Copper half-round is soldered at every joint — adds skilled labor time.
Linear footage and access
Per-foot pricing scales with the perimeter. Story count and roofline complexity affect install time the same way they do K-style.
Historic-match details
Period-appropriate inside and outside miters, custom color matching to historic trim, and copper spike-and-ferrule hardware are line items on full restoration installs.
EXAMPLE PROJECTS
Typical half-round gutters project profiles.
Three anonymized example homes to help you locate your situation in the range. These are illustrative examples — not quotes, and not based on any specific address.
EXAMPLE
North End bungalow
1930s bungalow, ~130 linear feet, 3 round downspouts.
- —5-inch aluminum half-round
- —Standard enamel color
- —Round corrugated downspouts
EXAMPLE
Caldwell historic two-story
1920s downtown two-story, ~210 linear feet, 4 round downspouts.
- —5-inch aluminum half-round with .032 gauge
- —Color-matched to historic trim
- —Profile-specific brackets
EXAMPLE
Eagle craftsman with copper
3,000 sq ft new-build craftsman, ~240 linear feet, copper half-round upgrade.
- —16oz copper half-round
- —Soldered joints
- —Round corrugated copper downspouts
Anonymized examples for illustration only. Real homes vary by linear footage, access, condition, and material selection. The written on-site quote is the only number that counts.
MATERIALS
Half-Round Gutters materials and options.
Profile
- 4-inch half-round (smaller eave overhangs, historic homes with modest roof area)
- 5-inch half-round (standard for most Treasure Valley homes with this profile)
- 6-inch half-round (larger custom homes, steep pitches, high-debris yards)
Material
- .027-gauge aluminum half-round (standard, full enamel color palette)
- .032-gauge aluminum half-round (heavy-duty for Foothills homes and wide spans)
- 16oz copper half-round (historic and high-end custom; develops natural patina)
- 20oz copper half-round (premium gauge for long spans and major custom projects)
Downspouts
- Round corrugated aluminum (standard match for aluminum half-round)
- Round corrugated copper (soldered match for copper half-round systems)
- Corrugated elbows and offsets matched to downspout material
Hangers
- Half-round aluminum fascia brackets (aluminum systems)
- Copper spike-and-ferrule (historic restoration, period-appropriate for copper)
- Copper-compatible stainless fascia brackets (modern copper install)
QUESTIONS
Half-Round Gutters cost questions.
Frequently asked questions
Why does the calculator default to the half-round profile?
Will the aluminum half-round range match copper half-round?
What homes are half-round gutters appropriate for?
How does half-round compare to K-style for drainage?
Are half-round gutters available in aluminum?
NEXT STEP
Get your real half-round gutters quote.
Free on-site estimates. Written quote before we leave. No same-day-close pressure. Licensed Idaho contractor RCE-6681702.
Calculator deep-link: open the full calculator with half-round gutters pre-selected.
Ready for Half-Round Gutters in the Treasure Valley?
Free on-site estimates from a licensed Idaho contractor — written quote before we leave.