Gutters & Downspouts
San Jose & the South Bay
A roof sends water somewhere — gutters decide where.
Gutters & Downspouts
Done Right Since 1952
A roof sends water somewhere — gutters decide where. Properly designed and installed gutter systems direct water away from your foundation, protect your siding and landscaping, and prevent the accumulated moisture issues that lead to dry rot, mold, and foundation problems. Keith Roofing has been installing gutters as part of complete roofing work since 1952, and we install seamless aluminum gutters, copper gutter systems, and gutter guards as standalone projects.
Gutters matter more in the Bay Area climate than most homeowners realize. Our concentrated winter rainfall — most of the year's precipitation falls in December through March — means gutters handle significant volumes during atmospheric-river storm events. Properly sized gutters with adequate downspout placement handle these loads; undersized or improperly sloped gutters overflow, sending water directly against siding and foundation.
Our gutter work includes: seamless aluminum gutter fabrication and installation (gutters fabricated on-site to exact length, no seam joints that can leak); copper gutter systems for premium and historic homes (50+ year service life, attractive patina development over time); gutter guard installations to reduce debris clogging; gutter repair and replacement for existing systems; and full gutter/downspout replacement coordinated with roof replacement projects.
How Proper Gutters Protect Your Home
The Case for Seamless Aluminum Gutters
Seamless aluminum gutters are the industry standard for good reason. Fabricated on-site to the exact length required for each run, seamless gutters eliminate the leak-prone joints of sectional gutters. Heavy-gauge (.032"+) aluminum is durable, lightweight, cost-effective, and available in color-matched finishes to complement your home's trim.
Proper installation matters enormously. Gutters should be pitched slightly toward downspouts (approximately 1/4" per 10 feet of run), fastened with hidden hanger systems to fascia (not exposed spike-and-ferrule hangers), sized appropriately for roof square footage and rainfall intensity (typical 5" K-style for most homes, 6" for larger roof areas), and positioned with adequate downspout count for drainage capacity.
When Copper is Worth the Investment
Copper gutters cost 3-4x aluminum but deliver 50+ year service life (vs. 20-30 for aluminum), develop an attractive verdigris patina that complements historic architecture, and never require painting or color refresh. For historic homes, premium architectural homes, and homeowners planning to stay long-term, copper can be the right choice — particularly on homes where the gutters are architectural features rather than just functional components.
Gutter Guards: What Works and What Doesn't
Homes with significant overhead tree coverage (particularly oak, eucalyptus, and redwood common in the Bay Area) can benefit from gutter guard installation. But not all gutter guards are equal. Foam inserts look inexpensive but clog over time. Simple screen guards catch large debris but let smaller needles and seeds through. Reverse-curve or solid-cover guards (like Leaf Relief or similar) work well but add meaningful cost. Fine-mesh stainless steel guards (Gutterglove, MasterShield) are typically the best balance of performance and cost.
For homes with tree overhang, guards reduce cleaning frequency from 3-4 times annually to 1-2 times every 2-3 years. For homes without significant tree coverage, guards may not be worth the investment. We help evaluate honestly.
Signs You Need
Gutters & Downspouts
Gutters Overflowing During Rain
Water cascading over gutter edges during heavy rain indicates undersized gutters, clogged drainage, or improper pitch. Repair or replacement prevents siding and foundation damage.
Gutters Pulling Away from Fascia
Sagging or separated gutters from failed hangers or fascia rot. Often repairable with new hanger installation and fascia repair, but sometimes indicates need for complete replacement.
Water Pooling Near Foundation
Water accumulation at the base of exterior walls or in basement after storms indicates drainage failure. Usually traces back to gutter overflow or inadequate downspout extension.
Visible Gutter Damage or Rust
Corroded aluminum, dented sections, or damaged joints compromise gutter performance. Patching can sometimes extend life; widespread damage signals replacement.
Ice Dam or Debris Damming
While less common in the Bay Area climate, debris accumulation in gutters during rainy season can cause overflow damage. Cleaning or guard installation addresses this.
New Roof Installation
Gutter replacement coordinated with roof replacement delivers a clean integrated installation. The few days during tear-off are the natural time to address aging gutters.
Gutter Options
We Install
5" K-Style Aluminum
Industry-standard seamless aluminum gutter profile. Handles typical South Bay residential rainfall capacity. Available in 15+ color options to match trim. $8-12 per linear foot installed.
6" K-Style Aluminum
Larger capacity for homes with significant roof area, steep pitches, or high rainfall exposure. Also standard for commercial applications. $10-15 per linear foot installed.
Half-Round Aluminum
Traditional profile for Craftsman, Victorian, and historic architectural styles where visible gutter aesthetic matters. $12-18 per linear foot installed.
Half-Round Copper
Premium material for historic and architectural homes. 50+ year service life with natural patina. $25-40 per linear foot installed.
K-Style Copper
Modern profile in copper for premium homes. $22-35 per linear foot installed.
Gutter Guards
Various systems from foam ($2-4/ft) to fine-mesh stainless steel ($10-18/ft) depending on tree exposure and desired performance. We evaluate tree coverage and recommend appropriate system.
How We Handle
Your Gutters & Downspouts
Site Measurement & Specification
We measure linear footage of gutter needed, determine appropriate size (5" or 6"), plan downspout placement for drainage capacity, and document any fascia or soffit issues that need addressing.
Color Selection & Material Order
Aluminum gutters are available in 15+ factory-applied colors to match trim. We order material for fabrication based on project specification.
Removal of Existing Gutters (If Applicable)
Safe removal of existing gutter system, fascia inspection and repair as needed, disposal of old material.
On-Site Seamless Fabrication
Gutters are fabricated on-site from coil stock using our gutter machine — exact length for each run, no seam joints.
Installation with Hidden Hangers & Proper Pitch
Gutters installed with hidden hanger system (not exposed spikes) at appropriate intervals. Proper pitch toward downspouts. Downspout installation with extensions directing water away from foundation.
Why Homeowners Choose Us
for Gutters & Downspouts
Coordinated with Roof Work
When gutters are part of a roof project, we handle both as integrated scope — cleaner installation, better detailing at eaves, single warranty contact.
Heavy-Gauge Material Standard
We use .032" aluminum as standard (some competitors use thinner .027" to save cost). Heavier material resists damage and delivers longer service life.
Proper Hanger Systems
Hidden hangers fastened to fascia — not exposed spike-and-ferrule systems that loosen over time. Proper hanger spacing for load capacity.
Copper Gutter Specialty
Many general roofers don't do copper work. We maintain copper-specific tooling, experience, and supplier relationships for premium installations.
Gutter Guidance
for Bay Area Homeowners
Seasonal timing, permits, fire-zone considerations and how to check out any contractor before you let them work on your home.
When to Service Gutters in the Bay Area
Clear gutters before the first storms — late August through October. Our rain arrives in a handful of concentrated atmospheric-river events, so a blocked gutter fails the whole system at once rather than gradually. Seasonal outlook from the NWS Bay Area office: NWS Bay Area forecast →
Trees, Debris and How Often to Clean
Under oak, redwood or eucalyptus, plan on three to four cleanings a year without guards, or one every two to three years with them. Homes with no overhead canopy can often go to a single annual service. Trimming limbs back from the roof plane cuts debris load and ember risk at the same time.
Do Gutters Need a Permit?
Gutter replacement and repair generally do not require a permit as standalone work, though re-roofing that includes new gutters does. Requirements are set by your city — San Jose properties go through the Building Division: City of San Jose →
Fire Zones and Gutter Choice
In wildland-urban interface areas — the Los Gatos, Saratoga, Almaden and Oakland hills among others — debris-filled gutters are a genuine ember-ignition point. Noncombustible gutters and metal guards, kept genuinely clear, are the right specification. Guidance from the State Fire Marshal: CA State Fire Marshal →
Salt Air Near the Bay
In Newark, Redwood City's Shores, San Leandro's Marina area and other bayfront locations, salt accelerates corrosion on gutters, hangers and fasteners. We specify corrosion-appropriate material near the water rather than the standard inland package.
Verify Any Contractor First
Gutter work is often sold door-to-door after storms. Confirm an active California license and current insurance before anyone works on your home. Keith Roofing is CSLB #1118418. Look up any contractor here: Look up any CA contractor →
Recent Gutters & Downspouts
Projects
Projects Featuring
Our Gutters Service
Real Keith Roofing projects where we delivered this service. Click any case study for the full story.
Los Altos Hills Standing Seam Metal
Full standing seam metal roof system plus custom half-round gutters on a hillside estate and matching ADU.
View Case Study →
Campbell New Construction
Premium new construction — 40-year Landmark shingles, standing seam metal accents, copper gutters throughout.
View Case Study →
Campbell Tar-to-Shingle Conversion
Tar-and-gravel tear-off and conversion to 30-year Landmark composition shingle with new gutters and single-ply carport.
View Case Study →
Saratoga Presidential Fire Repair
Fire-damage repair with seamless CertainTeed Presidential shingle tie-in and full gutter installation.
View Case Study →
Evergreen Tile Fire Damage Repair
Fire-damage repair on a concrete tile roof with solar panel coordination and color-matched tile replacement.
View Case Study →
San Jose Apartment Re-Roof
Multi-unit apartment re-roof — Landmark shingle on pitched wings, single-ply on flat carports, full gutter replacement.
View Case Study →