Seamless aluminum gutter installation and repair in Seattle. Gutter guards, downspouts, and drainage solutions with a 10-year workmanship warranty.
In the Pacific Northwest, gutters are not optional. They are essential. With 37+ inches of annual rainfall and months of continuous wet weather, your gutter system is the primary defense against water damage to your fascia, siding, foundation, and landscaping. When gutters fail, the consequences show up fast: stained siding, rotting fascia boards, flooded crawl spaces, and eroded landscaping.
K Single Corp installs and repairs seamless aluminum gutters across King, Snohomish, and Pierce County. We’ve been managing water on PNW homes since 2007, and we know what it takes to keep your home dry through the longest, wettest winters.
We exclusively install seamless gutters, and here’s why: traditional sectional gutters have joints every 10 feet where pre-cut pieces are connected. Over time, these joints separate, caulk fails, and you get leaks. Those leaks drip behind the gutter, soak the fascia, and run down your siding. In a climate where gutters are full of water for 8+ months a year, joint failure is inevitable.
Seamless gutters are custom-fabricated on-site using our portable roll-forming machine. Each gutter run is a single, continuous piece of aluminum with no joints, no seams, no leak points along the length. The only connections are at corners and downspout outlets, which we seal with commercial-grade sealant.
The result is a gutter system that’s stronger, lasts longer, looks cleaner, and performs better than sectional alternatives. For PNW homes, it’s the only option that makes sense.
| Type | Cost per Linear Ft | Lifespan | Maintenance | Notes |
|---|---|---|---|---|
| Seamless Aluminum | $6 - $12 | 20-30 years | Low | Most popular choice |
| Copper | $15 - $30 | 50+ years | Very Low | Premium, develops patina |
| Steel | $8 - $15 | 20-25 years | Moderate | Strong but can rust |
| Vinyl | $3 - $6 | 10-15 years | Low | Not recommended for PNW |
All prices include professional installation. We recommend seamless aluminum with leaf guards for most Seattle-area homes.
5-Inch K-Style Gutters. The standard for most residential applications. K-style gutters have a flat back that mounts flush against the fascia and a decorative front profile that complements most home styles. Five-inch gutters handle typical rainfall volumes for standard-sized PNW homes.
6-Inch K-Style Gutters. Recommended for homes with large roof areas, steep pitches, or in areas with heavy rainfall intensity. Six-inch gutters hold 40% more water than 5-inch gutters and are often the right choice for two-story homes with big roof spans. Many homes in areas like Issaquah, Snoqualmie, and the foothills receive heavier rainfall than Seattle proper, and 6-inch gutters provide the extra capacity.
Aluminum Construction. We use heavy-gauge (.032”) aluminum for all our gutters. Aluminum won’t rust, is lightweight, and is available in dozens of colors to match your home’s trim and fascia. We also install copper gutters for homeowners seeking a premium, architectural-grade look.
Oversized Downspouts. We install 3x4-inch downspouts as standard, larger than the 2x3-inch downspouts used by many contractors. The extra capacity prevents backups during heavy rain events and reduces the chance of clogs from debris.
For homeowners tired of climbing ladders to clean clogged gutters, we install micro-mesh gutter guard systems that keep debris out while letting water in. Our guards feature a stainless steel micro-mesh screen over an aluminum frame that fits seamlessly onto your existing or new gutters.
What they block: Leaves, pine needles, fir needles, seed pods, shingle granules, and small debris. Pacific Northwest homes deal with a constant barrage of organic debris, especially homes surrounded by Douglas fir, Western red cedar, and big-leaf maples.
What they allow: Full water flow, even during heavy rain events. The micro-mesh design handles PNW rainfall volumes without sheeting over.
Maintenance reality: No gutter guard is truly maintenance-free. We recommend a visual inspection once a year and occasional surface brushing if debris accumulates on top of the guards. But compared to cleaning out packed, decomposing debris from unguarded gutters twice a year, it’s a significant upgrade in both convenience and gutter performance.
Not every gutter problem requires full replacement. We handle common gutter repairs including:
Gutters are only part of the solution. Water needs somewhere to go once it reaches the downspouts. We ensure every gutter installation includes proper drainage:
For homes with persistent drainage issues like wet crawl spaces, standing water near the foundation, or basement moisture, we can coordinate with drainage contractors to connect your downspouts to a French drain or catch basin system.
We install and repair gutters throughout King County, Snohomish County, and Pierce County, including Seattle, Bellevue, Kirkland, Redmond, Renton, Kent, Burien, Federal Way, Tacoma, Everett, Lynnwood, and all surrounding communities.
Call K Single Corp at (206) 659-4349 for a free gutter estimate.
We fabricate seamless aluminum gutters on-site with our portable roll-forming machine. Each gutter run is one continuous piece with no joints, no seams, and no leak points. It's the only gutter system that makes sense for PNW rainfall.
Gutters are only part of the solution. We ensure every installation includes proper slope, oversized downspouts, extensions that direct water away from your foundation, and gutter guards if needed.
Ready to Get Started?
Free estimates with no obligation. We respond within one business day.
Real work on real homes across the Puget Sound.
Seattle
Remove old 5-inch gutters, install 6-inch seamless aluminum, oversized 4x5 downspouts, heated cable system at problem eave, new underground drain connections.
Lynnwood
Remove clogged sectional gutters, install 6-inch seamless aluminum gutters, 3x4 downspouts, micro-mesh leaf guard system, fascia board repair at two locations.
Tacoma
Remove old sectional gutters, install 5-inch seamless aluminum gutters, 3x4 downspouts, leaf guard screens, splash blocks, underground drain tie-in at two downspouts.
From first call to final walkthrough. Here's how we work.
We inspect your roof, discuss your needs, and provide a detailed, no-obligation estimate, typically within 48 hours.
You receive a clear, itemized quote with material options, timeline, and warranty details. No hidden costs.
Our experienced crew handles your project with care: quality materials, clean worksite, and daily progress updates.
We walk the completed project with you, ensure everything meets our standards, and activate your 10-year workmanship warranty.
We offer payment plans to fit your budget. Ask about financing options during your free estimate.
Seamless gutters are custom-fabricated on-site from a single continuous piece of aluminum for each run of your home. They have no joints or seams along the length, which means fewer potential leak points. Sectional gutters are pre-cut pieces snapped together, creating seams every 10 feet that can separate and leak over time. We exclusively install seamless gutters because they perform better, last longer, and look cleaner on your home.
Yes, quality gutter guards significantly reduce the amount of debris that enters your gutters. However, not all gutter guards are equal. We install micro-mesh guards that keep out leaves, pine needles, and shingle granules while allowing water to flow through. No gutter guard is 100% maintenance-free, but a good system reduces cleaning frequency from twice a year to once every 2-3 years. We recommend guards for homes with heavy tree coverage.
Seamless aluminum gutter installation for a typical single-family home ranges from $1,500 to $4,000 depending on the home's size, number of stories, and downspout configuration. Gutter guard installation adds $1,000-$3,000 depending on the system and total gutter length. We provide exact pricing during your free estimate with no hidden fees or charges.
For most PNW homes, we recommend 5-inch K-style gutters with 3x4-inch downspouts. Homes with steep roofs, large roof areas, or heavy tree coverage may benefit from 6-inch gutters with larger downspouts to handle high-volume rainfall. During your estimate, we calculate the drainage requirements for your specific roof area and pitch to recommend the right sizing.
Without gutter guards, we recommend cleaning your gutters at least twice a year, once in late fall after the leaves drop and once in late spring. Homes surrounded by evergreen trees (fir and pine needles are a constant problem in the PNW) may need cleaning 3-4 times per year. Clogged gutters cause water overflow that damages fascia, siding, and foundations.
Absolutely. Overflowing gutters dump concentrated water right at the base of your home. Over time, this saturates the soil around your foundation, leading to basement leaks, crawl space moisture, foundation erosion, and even settling. In the PNW where we get months of sustained rainfall, proper gutter function and downspout drainage away from the foundation are critical to protecting your home's structural integrity.
We do both. Common gutter repairs include resealing leaking seams on old sectional gutters, reattaching sagging sections, replacing damaged downspouts, and fixing gutter slope to eliminate standing water. If your gutters are in decent shape but have a few problem areas, repair is often the most cost-effective solution. We'll give you an honest recommendation during our inspection.
Every gutter installation includes our 10-year workmanship warranty covering all labor and installation. If any seam, hanger, or connection we installed fails within 10 years, we repair it at no cost. The aluminum material itself typically lasts 20 to 30 years and carries its own manufacturer warranty.
Most residential gutter installations are completed in a single day. Larger homes or projects that include gutter guard installation, extensive fascia repair, or custom downspout routing may take two days. We fabricate the seamless gutters on-site with our portable roll-forming machine, so there is no waiting on custom orders.
Get a free, detailed estimate for your gutters project. We respond within one business day.