Home › Projects › Commercial Gutter Replacement in Woodinville
High Point Gutter replaced 100 feet of gutter on a two-story commercial building in Woodinville in January 2026. The old gutter had been custom-built for the building’s previous roof and was fastened with screws through the roofing. The building now has a new TPO roof. The crew cut the old system free, removed it, and installed 100 feet of seamless commercial box gutter with DoublePro gutter covers and 46 feet of 3×4-inch downspout.
| Location | Woodinville, WA 98072 |
| Service | Commercial gutter replacement (partial) with gutter covers |
| Property | Two-story commercial building with roll-up bay doors and a TPO roof |
| Existing system | Custom gutter built with the previous roof, attached with screws through the roofing and roof hangers; integral hangers cut off and the gutter removed and recycled |
| New gutter | 100 linear feet of commercial box-style seamless aluminum, Ivory |
| Fastening | Hidden hangers every 2 feet with 1.5-inch screws and neoprene washers |
| Gutter covers | 100 linear feet of 6-inch DoublePro (Alu-Rex) |
| Downspouts | 46 linear feet of 3×4-inch aluminum, Ivory |
| Other details | 1 bayonet expansion joint; 100 feet of metal shearing on the gutter back; 2 drain cap adapters at the ground drains |
| Project investment | $6,300 to $10,500 |
| Timeline | Assessed November 12, 2025; site check January 15, 2026; installed and completed January 20, 2026 |
The building and the old gutter
High Point assessed the building on November 12, 2025. The existing gutter was a dark box-style system running along the roof edge of a two-story building with roll-up bay doors.
A closer look on January 15, 2026 showed why this was not a standard tear-off. According to the crew’s notes, the old gutter had been built custom with the building’s previous roof. It was attached with screws driven through the roofing and with roof hangers. The roof had since been replaced with TPO, a single-ply membrane roof. The notes also expected that the backing behind the gutter was most likely concrete, which meant concrete drill bits and anchors for the new fasteners.
Photos from that check show leaves, debris and moss in the old gutter along the edge of the white membrane.
How the job was planned
Because the old system was unusual, the job was planned in steps before install day:
- A ladder check first. When the quote was approved in December, the scheduling note asked for a technician to visit ahead of time and put a ladder up so there would be no surprises.
- A third crew member. The January 15 notes recommended a third person for mounting, so one could hold the gutter while another moved the ladder to drill and fasten.
- Gutter formed ahead of time. The new gutter was run out on January 17 and staged at the property.
- A full day on site. The job was scheduled as a full-day install with a morning start.
Removing the old system
The old gutter had integral hangers built into it. The quote included labor to cut those hangers off with a grinder, plus removal and recycling of all 100 feet. Crew notes from install day describe the removal as very difficult.
What went up in its place
The new system is 100 feet of commercial box-style gutter in continuous seamless lengths, in Ivory aluminum with a baked-on enamel finish. Details from the quote:
- Hidden hangers every 2 feet, fastened with 1.5-inch screws and neoprene washers.
- Rectangular preformed outlets, sealed with rivets and silicone, rather than cut-and-fold outlets.
- Slope set with torpedo levels during installation.
- 100 feet of metal shearing, listed in the quote as shearing the back of the gutter.
- One bayonet expansion joint. It looks like a standard joint between two pieces but lets them expand and contract.
- 46 feet of 3×4-inch downspout. The quote notes that 3×4 moves water at twice the rate of a 2×3-inch downspout.
- Two drain cap adapters where the downspouts meet the 6-inch ground drains, to make it harder for ground debris to get into the drain.
The gutter was finished with 100 feet of 6-inch DoublePro, a continuous hanger with a built-in cover, along the full run.
Commercial gutter replacement cost in Woodinville, WA
This project fell in the $6,300 to $10,500 range. That covered cutting off and removing 100 feet of the old custom gutter, 100 feet of new commercial box gutter with DoublePro covers, 46 feet of 3×4-inch downspout, the expansion joint, the gutter-back shearing, and two drain cap adapters.
On this building, the removal and the gutter-back shearing were their own line items on top of the gutter itself. A building with a standard hung gutter and easy access would not carry those extra items. This range reflects the scope of this completed project and is not a current quote.
What commercial property owners should know
Find out how your current gutter is attached before you budget. On this building, the old gutter was fastened through the roofing and had built-in hangers, and that drove the removal plan.
A new roof does not always mean new gutters went up with it. Here the roof had been replaced with TPO while the old custom gutter stayed in place.
Ask about a site check on unusual jobs. High Point sent a technician out ahead of install day on this one, and the notes from that visit set the crew size, tools and schedule.
Related questions
How much does commercial gutter replacement cost in Woodinville, WA?
This Woodinville project fell in the $6,300 to $10,500 range for 100 feet of commercial box gutter with DoublePro covers, 46 feet of 3×4-inch downspout, and removal of an old custom gutter. Simpler removals and shorter runs cost less.
What is a commercial box gutter?
It is a squarer, box-shaped gutter profile used on commercial buildings. On this project it was formed in continuous seamless aluminum lengths in Ivory.
Can gutter covers go on a commercial building?
Yes. This building got 100 feet of 6-inch DoublePro along the new box gutter, installed during the same job.
What is a gutter expansion joint?
It is a joint that lets two lengths of gutter expand and contract with temperature while still looking like one continuous run. This project used one bayonet-style expansion joint.
How long did this project take?
The install was scheduled as a full day on site in January 2026, after the November assessment, a January 15 site check, and running out the gutter on January 17.
About this project
This project documentation was prepared by High Point Gutter from the job records and photos from our crew, October 2026. Technical review by Ben Metsker, Manager, High Point Gutter.
High Point Gutter provides commercial gutters in Woodinville and across the Greater Seattle Area. See more projects in Woodinville. If your building’s gutters were built into an old roof, we can check how they are attached and plan the replacement.