The Brothers That Just Do Gutters · Sunnyvale
Gutter Sizes in Sunnyvale & the Peninsula
5, 6 and 7 inch gutters, sized to your roof area, pitch and the raon the Peninsula actually gets.
- Licensed & Insured
- Seamless Gutters Formed On-Site
- Serving Sunnyvale & the Peninsula
Quick answer
Gutter Sizes in Sunnyvale and the Peninsula: The Brothers That Just Do Gutters Sunnyvale forms 5 inch, 6 inch and 7 inch seamless gutters. 5 inch fits most homes, 6 inch handles roughly 40 percent more water for large or steep roofs, and 7 inch is for commercial and very large roof areas. Call (650) 600-0598 or book online.
Gutter sizing on the Peninsula
Why so many Peninsula gutters are the wrong size, and how we fix it
Plenty of homes here still carry the gutters they were built with, one size around the whole house. The right answer is usually a size for each run, set by the water that run actually collects.
Many original systems on the Peninsula went up as a single size on every edge, because that was the simple way to do it. Then additions got built, second stories went on, roofs were redone in tile or metal, and nobody changed the gutters. The result is a system that handles an ordinary rain fine and spills at the same two or three spots every time a winter storm parks overhead.
Gutter size is about capacity. A wider trough holds and moves more water, and a 6 inch gutter carries about 40 percent more than a 5 inch even though it is only an inch wider. What decides the size is the roof above each run: how big it is, how steep it is, and whether valleys or upper roofs are pouring extra water into one spot.
Because the problem is usually local to a few sections, the fix often is too. Mixing sizes on one house, with larger gutters only where the water concentrates, is common and often the most cost-effective option.
The three sizes side by side
| Size | Usual downspout | Typical fit | Details |
|---|---|---|---|
| 5 inch | 2 by 3 inch, or 3 by 4 inch on larger roofs | Single-story homes and runs under 40 feet with a downspout, or longer runs with two | 5 inch gutters |
| 6 inch | 3 by 4 inch | Long runs, lower gutters under upper roofs, valleys, tile and metal roofs | 6 inch gutters |
| 7 inch | Oversized, matched to roof area | Commercial buildings, barns and very large roof planes that overload 6 inch | 7 inch gutters |
Signs a section is undersized
- It overflows in heavy rain even right after a cleaning.
- Water shoots over the front edge below a steep roof plane or valley.
- A lower gutter spills where an upper roof’s downspout empties onto it.
- One long run drains to a single downspout at the far end.
- The splash line on the siding or stucco sits under the same corner every winter.
- The roof was redone in tile or metal and the old gutters stayed.
What we measure before recommending a size
Your Solutionist does not pick a size from the curb. Each run gets measured for length and for the roof area that drains into it, the pitch gets checked because steep roofs throw water faster, and we trace where valleys and upper roofs land. Downspouts get the same attention, since a bigger gutter with a small outlet still backs up. The estimate lists the size for each section so you can see where the money goes.
Size works together with profile and material, covered on our gutter styles and specialty materials pages, and every size is formed on site as part of our seamless gutter installs. If you are in Foster City, Cherry Chase or anywhere else on the Peninsula, we will size your roof the same way.
Find out which sections of your roofline need more capacity. Call (650) 600-0598
Get a Free EstimateServices
More Ways We Help Peninsula Homeowners
Related services from the same local crews.
Aluminum and specialty gutters formed on-site to the exact length of your roofline. No factory seams, sized for Peninsula rainfall.
Learn more Gutter CleaningOak and liquidambar leaves, redwood and pine needles and palm debris cleared by hand, downspouts flushed and tested.
Learn more Gutter RepairLeaking seams, sagging runs, loose hangers and rotted fascia, repaired the same visit when possible.
Learn more BroGuard Gutter GuardsFine metal mesh built for oak and redwood country. Stops leaves, needles and grit while a full winter of Peninsula rain flows straight through.
Learn more Maintenance ProgramScheduled cleanings before the first storms and again after the rainy season so your system never gets a year off.
Learn more Free estimateRequest a Free EstimateTell us what is going on with your Sunnyvale gutters. A local Solutionist walks the roofline, explains what you actually need and leaves a written price. No pressure, no obligation.
Book my free estimate or call (650) 600-0598How it works
From first call to clean rooflines
- 1Call or book online
Tell us what is going on with your Peninsula gutters. Same local team answers.
- 2On-site walkthrough
A Solutionist checks the roofline, downspouts and drainage and gives you a written estimate.
- 3The work gets done
Seamless runs formed in your driveway, cleaning and repairs finished the same visit when possible.
- 4Walkthrough and clean-up
We flush-test the system, show you the results and leave the property cleaner than we found it.
Why the Brothers
Why Peninsula Homeowners Call the Brothers
Eric Dodge runs it out of our shop on Willow Avenue in Sunnyvale. When you call (650) 600-0598 you reach the local team that works from Sunnyvale to San Francisco every week.
Our truck carries the machine. Each run is extruded on-site to the exact length of your roofline, so there are no factory seams to leak when the winter storms arrive.
BroGuard fine metal mesh stops oak leaves, redwood and pine needles and palm debris while heavy rain flows through. Nothing plastic on your roofline.
Cleanings before the leaf drop, downspout flushing and repairs scheduled before the first atmospheric river, so your gutters are not the weak link in December.
Year-round
Your Peninsula gutter calendar
What we are doing on Peninsula rooflines each season, so your system is ready before the weather asks it to work.
- Fall · Sep to NovPre-storm cleaning
Oak and liquidambar leaf drop cleared and downspouts flushed before the first real rain arrives.
- Winter · Nov to MarAtmospheric river response
Overflow and clog calls prioritized ahead of forecast systems, plus emergency repair on loose runs.
- Spring · Apr to MaySpring clean-out and guards
Blossom, seed and pollen cleared, and BroGuard fine mesh installed ahead of the next leaf drop.
- Summer · Jun to AugInstall season
The long dry window for new seamless runs, fascia repair and downspout upgrades before the rain returns.
The Work
Seamless Gutters, Done Right.



Reviews
What Peninsula Homeowners Say
“The crew from ‘Brothers’ did a great job repairing a damaged segment of the gutters at our home in Los Altos. They showed up on time, as promised, completed their work diligently and took care to clean up carefully after the work was completed. Many thanks!”
Posted on Google“They were very professional, approachable and responsive to the desires of the customer’s end goal. The crew worked very efficiently. They offer the curbed sleek gutters which are not easy to find; I’m happy with the overall results!”
Posted on Google“The Brothers were great to work with. Quick response, easy scheduling, flexible accommodation of our requests. Front man Max and get ’er done Robert both knew their stuff. They also didn’t hesitate to come back immediately for some touchups even after they had my money.”
Posted on GoogleGutter Sizes Questions, Answered
Most single-family homes do fine with 5 inch gutters. Go to 6 inch when a run over 40 feet cannot have two downspouts, a run is longer than 60 feet, an upper roof drains into a lower gutter, or an inside valley sends fast water over the edge in heavy rain. 7 inch is for very large roof areas and commercial buildings.
Yes, and it is often the most cost-effective fix. Upsize only the sections that need capacity, like a lower gutter catching an upper roof or a run below a valley, and keep 5 inch everywhere else. The profiles line up, so the mix is hard to spot from the street.
Yes. Steeper roofs shed water faster, and on a steep pitch water can overshoot a small gutter in a downpour. Roof area and how much water concentrates into one run matter too. That is why a Solutionist measures the roofline and looks at the pitch before recommending a size, instead of defaulting to one.
Yes. A 6 inch gutter is only an inch wider than a 5 inch, but it handles about 40 percent more water. In the burst storms the Peninsula gets each winter, that margin is what keeps a long run from spilling at the corner.
Yes. Upsizing for capacity does not mean giving up the look you want. Larger gutters come in the same wide range of colors, and we can often match shades outside our regular swatches, like downspouts that match your siding. A Solutionist will show you options at the estimate.
For special cases, ask. Most Peninsula homes are covered by 5, 6 or 7 inch, but oversized gutters beyond 7 inch exist for roofs that concentrate unusually large volumes of water. Your local Solutionist can tell you what is available for your roofline.
Service area
Peninsula communities we serve
Every community on this list is inside our service area and gets the same local crews, on-site seamless gutters and free written estimates. Our territory covers 70 ZIP codes running from Santa Clara up the Peninsula and across all of San Francisco. Call (650) 600-0598 or request a free quote and a Solutionist will come out.
Free estimates
Ready for gutters that actually work on the Peninsula?
Free, no-pressure estimates from local Solutionists. Seamless gutters formed at your home, cleaning and repair scheduled around you, and BroGuard protection that keeps you off the ladder.
The Brothers That Just Do Gutters · Sunnyvale · (650) 600-0598 · Serving Sunnyvale, CA and the Peninsula
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Licensed, Bonded & Insured · California Contractor License #1123680

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