CommercialMetal Roofing

Metal roofing is the dominant system across Frederickson Industrial Center and the Tideflats manufacturing corridor — the sheer volume of R-panel and exposed-fastener standing-seam installed on those buildings over the past four decades makes metal roofing one of our highest-demand services in the South Sound. Frederickson alone covers roughly 2,200 acres with approximately 7.3 million square feet of industrial building space, most of it under metal roofing. When any meaningful percentage of that inventory needs attention simultaneously — as happens after a hard wind event or when the roofs installed in the early-2000s construction wave age out together — the demand is concentrated and urgent.

The defining maintenance issue on exposed-fastener metal roofing in Tacoma is fastener corrosion. Every screw that pierces the panel is a potential water entry point if the EPDM washer deteriorates or the fastener shaft corrodes to the point where it no longer seals against the panel. In marine-influenced air — Tacoma's position at the head of Puget Sound and adjacent to Commencement Bay means salt-laden moisture moves inland through the Tideflats on prevailing southwest winds — that corrosion process moves faster than it would in an inland industrial park. We find failed fasteners on Tideflats buildings that are only 12 to 15 years old, where similar buildings in the Puyallup or Auburn area hold another decade before the same failure pattern appears.

R-panel lap seams are the second critical failure point. The sidelap between adjacent panels relies on a factory-applied sealant tape that has a finite service life. Once that sealant degrades, wind-driven rain enters the lap and can travel several feet along the seam before dripping internally. Tracing those leaks back to the entry point requires systematic probing in wet conditions — we walk every lap seam on affected sections during or immediately after rain to correlate interior drip locations with exterior entry points.

For Port of Tacoma logistics facilities and the large-format warehouses along Marine View Drive and SR-509, metal roof maintenance has to account for constrained dock access. Many of these buildings have continuous dock operations with truck queues along the building perimeter, and scheduling access for a roofing crew requires coordination with the facility manager. We plan metal roof work with that logistics reality in mind — early morning mobilizations, specific bay closure windows, and equipment staging that does not conflict with forklift and truck movement.

Thermal movement is a factor on large metal roof panels that owners sometimes underestimate. Tacoma's temperature range is moderate by national standards, but a dark R-panel roof surface can reach 140°F on a July afternoon and drop to 28°F on a January night. Over the 200- to 400-foot panel runs common on Frederickson warehouse buildings, that thermal cycling creates significant longitudinal movement. Fasteners that are over-torqued during installation — a common field error — elongate their holes over years of movement, converting a tight seal into a loose, leaking connection.

We approach metal roof repairs with a full-panel-run assessment rather than treating each reported drip as an isolated event. A building manager who calls about three interior drip buckets is typically dealing with ten or fifteen failed fasteners scattered across a roof section. Replacing only the three obvious ones leaves the others to fail in the next storm. We price and execute repairs by roof section with a systematic fastener inspection across the full panel width and length.

When exposed-fastener metal reaches end of useful life and a full re-roof is warranted, we evaluate whether the existing structural purlin spacing and load capacity will support a standing-seam recover over the existing R-panel, or whether a tear-off is required. A standing-seam recover eliminates the exposed-fastener corrosion problem permanently and can be installed without disrupting operations below — an important consideration on buildings in the Sumner-Pacific Manufacturing Industrial Center where production lines run on tight schedules.

Coating systems applied over existing metal roofing — acrylic or silicone-based elastomeric coatings — are an intermediate option for metal roofs that are structurally sound but showing surface corrosion and fastener weeping. On Tacoma's large industrial buildings, a coating program can add 10 to 15 years of serviceable life at a fraction of replacement cost. We assess substrate condition carefully before recommending coatings: rust scale, active panel corrosion, or significant fastener failure density pushes the recommendation toward replacement rather than coating.