Sheet Metal Roofing Seattle WA: Commercial, Residential, Installation, Replacement, and Repair
Seattle averages roughly 38 inches of rain a year, spread across 150-plus wet days. That rain doesn’t come in short bursts. It sits over the city for days at a time, and it settles into every seam, valley, and fastener point on a roof. Sheet metal roofing is built for exactly this kind of exposure. It sheds water fast, resists the moss and algae growth common under Seattle’s tree canopy, and holds up through the freeze-thaw swings that hit neighborhoods at higher elevation, like view homes near Magnolia and West Seattle.
Roofs shaded by Douglas fir and cedar, common across Wallingford, Ravenna, and the Arboretum-adjacent blocks of Madison Park, collect acidic needle debris in the panel laps. Left in place, that debris traps moisture against the metal and speeds up coating wear. North-facing roof slopes hold onto that moisture longer than south-facing slopes, which is why moss tends to build up faster on the shaded side of a roof.
Metal Roofing Seattle WA is a local roofing contractor serving homeowners and businesses across Seattle, Washington. As sheet metal roofing contractors, we work on properties from Ballard to Beacon Hill, Queen Anne to Georgetown, and everywhere in between. Our crews install, replace, and repair metal roof systems using galvanized steel, Galvalume, and aluminum panels selected for Puget Sound conditions. Homes closer to the water, in areas like Alki and Golden Gardens, hold up better long-term with aluminum or Galvalume panels, since airborne salt from Puget Sound speeds up corrosion on unprotected steel. Every job follows Washington Building Code, from deck preparation to final flashing.
If you searched for sheet metal roofing near me, this page covers what our roofing services include, which panel types we install, and what property types we work on across Seattle.
Our Sheet Metal Roofing Services
As sheet metal roofing specialists, we handle every stage of the process: installation, full replacement, and repair. Below is a breakdown of our commercial and residential roofing services in Seattle, along with the property types we work on most often.
Commercial Sheet Metal Roofing Seattle
Seattle’s commercial buildings carry a mix of flat, low-slope, and pitched roofs, and each one takes on standing water differently during the rainy season. As a commercial sheet metal roofing contractor, we work on warehouses and distribution buildings in SODO and Georgetown, office buildings in downtown Seattle and South Lake Union, retail and mixed-use buildings in Fremont, Ballard, and Capitol Hill, restaurants, and multi-family apartment buildings throughout the city.
Panel selection on a commercial project starts with roof pitch and drainage design, not just appearance. Standing seam panels need a minimum slope to perform correctly. Below that slope, water can back up under the seams during heavy rain instead of running off. On flat and low-slope commercial buildings, we design tapered insulation and drainage paths before panel installation, since standing water is the main driver of early corrosion on any metal roof system.
We use Galvalume and galvanized coatings on commercial roofs because they resist rust better than untreated steel in a climate where the roof rarely dries out completely between storms. Rooftop HVAC units and vents also factor into the plan. Every penetration point gets custom flashing, since a generic flashing detail is one of the most common sources of commercial roof leaks in Seattle.
We schedule commercial roofing projects around business hours. A warehouse in Georgetown has different access and downtime constraints than a retail storefront on Capitol Hill, and we plan crew logistics around that difference rather than using one fixed schedule for every property type.
Residential Sheet Metal Roofing Seattle
A properly installed metal roof lasts 40 to 70 years. An asphalt shingle roof in Seattle’s climate typically lasts 15 to 20 years, largely because constant moisture accelerates granule loss, curling, and moss growth under shingles. Over a 40-year span, that’s two to three shingle replacements against one metal roof installation.
We work across a wide mix of housing stock: Craftsman bungalows in Wallingford and Green Lake, historic homes in Capitol Hill and Queen Anne, newer construction in West Seattle and Ballard, townhomes, condos, and floating homes on Lake Union. Older homes built before the 1960s often have plank decking instead of plywood sheathing. Plank decking needs a different underlayment approach, since gaps between boards can telegraph through certain panel profiles if the underlayment isn’t rated for it.
For homes with heavy tree cover, we typically recommend Standing Seam with a hidden fastener system. The raised seam keeps needle debris and moss from settling directly over exposed fasteners, which reduces the chance of a fastener backing out over time. For homeowners working within a set budget, exposed-fastener panels like 5V and ribbed profiles perform well on simpler roof shapes with fewer valleys. For qualifying roofs, we also install metal over an existing shingle layer, which can reduce total project cost.
Sheet Metal Roof Installation Seattle
Before any panels go down, we verify roof pitch and structural support. Panel profile selection depends on that pitch: standing seam and exposed-fastener systems each have different minimum slope requirements, and installing the wrong profile on too low a slope is a common cause of early leaks.
We install high-temperature synthetic underlayment beneath the panels rather than standard felt. Metal roofing runs hotter in direct sun than shingles, and standard felt underlayment can break down faster under that heat over time. On roofs with poor attic ventilation, common in older homes across Beacon Hill and Rainier Valley, we also address ridge and soffit ventilation as part of the installation, since trapped heat and moisture can shorten the life of the panels from underneath.
From there, installation follows a set sequence: underlayment application, drip edge and trim installation, panel placement, and fastening at set intervals, typically 24 inches on center, using fasteners engineered to resist backing out as the roof expands and contracts through the seasons. We review panel profile, trim package, and fastener type with the property owner before work begins, along with a written estimate and timeline.
Sheet Metal Roof Replacement Seattle
A roof reaches replacement stage when the signs are clear: loose or rusted panels, missing fasteners, seam separation, or water stains on interior ceilings. In Seattle, these issues tend to surface first on shaded, moisture-heavy sections of a roof, particularly north-facing slopes and areas beneath overhanging branches in neighborhoods like Wedgwood and Ravenna, where moss holds water against the panel surface longer than it should.
Replacement starts with a full inspection of the existing roof, including the deck underneath. Years of trapped moisture can soften plywood sheathing even when the panels themselves look intact from the ground, so we check deck condition before quoting a final scope. Tear-off comes next where needed, followed by deck repair, new underlayment, and installation of new panels. In qualifying cases, we can install a new metal roof over an existing shingle layer, which reduces tear-off costs and disposal time.
Every replacement comes with a written scope of work outlining the panel type, underlayment, trim package, and fastener system used, along with documentation of the roof’s condition before and after the project.
Sheet Metal Roof Repair Seattle
Not every issue requires full replacement. Common repair calls in Seattle involve loose or missing fasteners, damaged flashing around chimneys and roof penetrations, moss and debris buildup trapping moisture at seams, minor rust spots, and seam separation on standing seam panels.
Most leaks we find don’t start at the panels. They start at flashing, valleys, or penetration points, especially on roofs with heavy tree cover or roofs facing prevailing wind and driving rain off Puget Sound. A repair call often turns up moss-packed valleys or a cracked pipe boot rather than a failed panel. We trace the leak to its actual source, repair or replace the affected section, and confirm the fix holds under water testing before closing out the job.
On older roofs, we also check coating condition and fastener integrity while we’re already on the roof. Replacing worn fasteners with corrosion-resistant hardware, and clearing needle and moss buildup from valleys, extends the roof’s service life without the cost of a full replacement.
Contact Us Now For Your FREE Sheet Metal Roofing Estimate!
A free estimate with Metal Roofing Seattle WA includes a full roof inspection, a moisture and ventilation assessment, a panel and material recommendation suited to your roof’s exposure and slope, a written project scope, and a clear timeline. You’ll know the condition of your roof, what it needs, and what the work will cost before anything is scheduled. Contact us today to set up your free inspection anywhere in Seattle, Washington.