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Mammoth Roofing & Exteriors(210) 934-9074Free Roof Grade

Seamless gutter installation in San Antonio, sized for a Hill Country downpour.

Two inches of rain in an hour is a normal Texas afternoon, and a 5-inch gutter with a small downspout can't move it. We install seamless aluminum gutters sized for the roof, guards where the trees demand them, and downspouts that actually drain. Bundle it with a replacement and the ladder only goes up once.

If everything’s fine, we tell you.
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Photos, a written Roof Grade and a clear next step.

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A Mammoth roofer fitting material beside a brick chimneyReal Mammoth roof work
4.9★346 Google reviewsOur Boerne Google profile
BBB Accredited · A+Accredited since 2018
Workers’ comp carriedAsk us for the certificate
2017Roofing since 2017Rooted in Texas
Mammoth Two Tusk Limited Lifetime WarrantyMonumental Installation System

Five gutter problems, and what we do about each.

Clogged gutters

Leaves, twigs and roof granules back the water up over the fascia and onto the foundation. We clear them and install guards where the trees make it a yearly job.

Leaky seams

Sectional gutters leak at every joint eventually. We reseal where it makes sense and replace with seamless where it doesn't.

Misaligned gutters

Texas soil moves and gutters pull away from the fascia. We realign with reinforced brackets so they stay put and drain the right way.

Rust and corrosion

Old galvanized steel rusts through. We replace corroded runs with seamless aluminum or copper and coat what stays.

Damaged downspouts

A crushed or undersized downspout floods a bed and a foundation. We repair, replace and upsize to 3-inch round outlets where the rain demands it.

Do the gutters the same week.

New drip edge, new gutters, one crew, one clean-up. The bundle is cheaper than two visits, and one company answers for the roof edge and the gutters.

Roof replacement

Why we ask about the roof before we quote the gutter.

5" or 6"

Six-inch gutters carry roughly 40% more water. Big roofs, steep pitches and long runs get six.

Downspouts

Standard 2×3 downspouts choke in a storm. We install 3×4 or 2¾-inch round outlets and add downspouts where the run is long.

Pitch and hangers

Gutters need fall toward the downspout and hidden hangers every 24 inches, not spikes every four feet.

Guards

Under oaks and cedar elms, guards pay for themselves in two skipped cleanings. On an open roof they're optional; we'll say which.

What we install.

  • Seamless aluminum. Rolled to length on site in K-style or half-round, in the color range, no joints to leak. The default.
  • Copper. For historic homes and accents. Expensive, beautiful, permanent.
  • Guards and screens. Micro-mesh or reverse-curve, chosen for the tree species overhead.
  • Fascia and soffit. Rotten fascia and blocked soffit vents get fixed with the gutters, because the gutters hang off them.
Mammoth crew protecting the ground beside a home
Care for the home around the roof

Straight answers before you book.

Ask your local team
Do I need gutters in San Antonio?

If the house has a foundation, yes. Hill Country clay soils swell and shrink with water; keeping the roof run-off away from the slab is the cheapest foundation insurance there is.

Seamless or sectional?

Seamless. The joints are where sectional gutters fail, and seamless costs little more once a crew is on site.

Can you install gutters on a roof you didn't replace?

Yes. Most gutter jobs are stand-alone; we check the fascia and drip edge first so the new gutters have something sound to hang on.

Is the inspection really free?

Yes — it's the same Roof Grade visit for every service. Attic first, 75–150 photos, the 32-point Hunter-Gatherer Report, a letter grade and a plain-English verdict. You get the written report whether you hire us or not.

Will you tell me if I don't need the work?

Yes. An A grade is a handshake and a date to look again. A B means a few small repairs, priced in the open, on a roof with years left in it. We'd rather be the roofer you call in ten years than the one who sold you a roof you didn't need.

What warranty comes with the work?

Repairs carry a workmanship warranty in writing on the invoice. Full replacements carry the Mammoth Two Tusk Limited Lifetime Warranty: our 10-year workmanship warranty on the installation, plus the manufacturer's limited lifetime material warranty on the roofing materials. Ask us for the warranty document and read it before you sign.

Know where
your roof stands.

The Roof Grade is free. The report is written.
What happens next is your decision.

  • 32 inspection points, attic first
  • 75–150 photos of what we find
  • An honest, written recommendation

Get your free Roof Grade

Free inspection + photo report + measurement + proposal. Yours to keep.

No pressure. If everything’s fine, we tell you.