Fiber cement siding has become one of the most specified exterior claddings in North America, and manufacturers have answered with wave after wave of plant expansions. The name Tacoma appears in engineering classrooms through the Tacoma Narrows Bridge collapse case study, but the city also anchors one of the largest fiber cement production centers in the country. A recent expansion near the city added a 400,000-square-foot plant at a cost of $187 million and created up to 240 jobs.
The project reads like a template for the industry: a second plant on an existing campus, a state grant to cover pre-construction costs, and a workforce pipeline built around the new jobs. For builders and remodelers, the interesting part is what the capacity means downstream: shorter lead times, steadier prices, and more colors in stock.
How Fiber Cement Siding Is Manufactured
Fiber cement starts as a mix of Portland cement, silica sand, cellulose fiber, and water. The slurry is formed into sheets, pressed, and cured, then cut into lap, panel, and trim profiles. Autoclaving accelerates the cure and hardens the board, and finishing lines apply primer and color before the product ships. Quality control samples run continuously, testing density, impact strength, and dimensional stability so the panels that reach a job site hold the same profile as the samples in the showroom.
Quarrying sand and aggregates leans on the same heavy equipment lineage documented in the evolution of dragline excavators, which moved bulk earth long before the first siding panel was pressed. A modern plant draws raw material by the railcar and moves it through crushers, silos, and mixers on a schedule measured in hours.
From Raw Material to Finished Panel
- Proportion and blend cement, sand, cellulose fiber, and water into a slurry.
- Form the slurry into continuous sheets and press to thickness.
- Cure the boards, then autoclave them to full strength.
- Cut and profile the panels into lap, shake, and trim shapes.
- Apply primer and factory finish, then package for shipment.
| Raw material | Role in the panel | Typical share |
|---|---|---|
| Portland cement | Binder that gives the board its strength | About 30 percent by weight |
| Silica sand | Aggregate that adds hardness and stability | About 40 to 45 percent |
| Cellulose fiber | Reinforcement that resists cracking | About 5 to 10 percent |
| Water | Drives the chemical cure | Balance of the mix |
Why Producers Expand Manufacturing Capacity
Capacity follows demand, and fiber cement demand has climbed with housing starts, re-cladding programs, and the shift away from field-painted wood. Freight is the second driver: siding weighs more per square foot than almost any competing cladding, so a plant within a day’s drive of a metro area wins on delivered price. Expansions on existing campuses also reuse infrastructure, permits, and trained labor, which shortens the path from groundbreaking to first shipment.
Expansion announcements follow a similar playbook across the industry; a producer expanding its Alabama manufacturing facility mirrored the Pacific Northwest project with new capacity and added jobs. The pattern repeats because the economics repeat: regional supply lowers freight, and lower freight wins bids.
Capacity decisions also follow the competition. When one producer expands, rivals answer within a year or two, because the contractor who buys siding buys on delivered price and availability. A market served by three regional plants behaves differently from one served by a single distant factory, and that shift shows up in bid prices on both new construction and re-clads.
Incentives and Pre-Construction Costs
Industrial projects of this scale usually involve public incentives, and the details show how they work. A $100,000 Working Washington grant reimbursed pre-construction costs such as engineering, permitting, and site studies through the regional economic development board. That is a small share of a $187 million project, but it de-risks the early phase when nothing is built yet and the money is going out.
Building a Large-Scale Manufacturing Facility
A 400,000-square-foot plant is a small town under one roof. Construction starts with clearing, grading, and a deep foundation system sized for process equipment, then moves to the structural steel frame, the building envelope, and the utility runs. Process equipment is the long pole: mixers, forming lines, presses, autoclaves, and finishing lines are ordered months before the building is enclosed, and projects of this size typically run 18 to 24 months from groundbreaking to first panel.
Site preparation for a plant of this size starts with massive earthmoving, the kind of work big and mighty dragline excavators handle at scale before the foundations go in. On most industrial sites the grading contractor moves hundreds of thousands of cubic yards before the first footing is poured.
Construction Phases for a New Plant
The sequence is predictable: site work, foundations, structure, envelope, process equipment, utilities, commissioning. Each phase has its own critical path, and delays compound because equipment installation waits on the building and commissioning waits on both.
Site Work and Foundations
Foundations for process buildings carry point loads from presses and autoclaves that a typical commercial slab never sees. Geotechnical work happens first, and the concrete design follows the equipment layout rather than the other way around. Floor flatness specs are tight because the finishing lines move panels on precision conveyors.
Jobs and the Local Economy
The headline number on a plant expansion is usually the jobs, and a 400,000-square-foot facility creates them across the pay scale: machine operators, quality technicians, maintenance mechanics, forklift operators, and office staff. Up to 240 jobs at one plant, plus the construction jobs during the build, ripple through the local economy through suppliers, hotels, and restaurants. The wage mix matters as well: production jobs in building materials pay above the regional retail average, so the payroll effect lands in the local housing market and the tax base. Training programs often start before the roof goes on, so the first shift is ready when the lines start.
Even the finishing touches on an industrial building follow the same rules as commercial work, and the lessons from using Windsor windows and doors apply to the plant’s offices, training rooms, and visitor center. Glazing performance, daylighting, and thermal comfort matter in a building where people work three shifts.
Types of Jobs at a Siding Plant
- Machine operators who run the forming, pressing, and cutting lines.
- Quality technicians who sample boards and monitor the cure.
- Maintenance mechanics who keep autoclaves and conveyors running.
- Logistics staff who manage raw material intake and finished goods shipping.
| Expansion element | Example scale | What it delivers |
|---|---|---|
| Manufacturing space | 400,000 square feet | Doubles regional production capacity |
| Capital investment | $187 million | New plant, equipment, and infrastructure |
| New jobs | Up to 240 | Operators, technicians, and logistics roles |
| Public grant | $100,000 | Covers pre-construction engineering and permits |
Putting 400,000 Square Feet in Perspective
A 400,000-square-foot footprint is hard to picture from the ground. Understanding square footage in construction makes the number concrete: the building covers about nine acres, roughly eight football fields, or the floor area of 200 typical 2,000-square-foot houses. Seen that way, the scale of the investment makes sense, and so does the delivery radius a plant of this size can serve.
Comparing Industrial Space to Familiar Buildings
| Reference | Size | How 400,000 sq ft compares |
|---|---|---|
| Football field | About 48,000 sq ft | More than eight fields |
| Acre | 43,560 sq ft | About nine acres |
| Average house | About 2,000 sq ft | About 200 houses |
| Big-box store | About 120,000 sq ft | More than three stores |
What Expanded Capacity Means for Builders and Remodelers
For the people actually installing siding, expanded capacity shows up as shorter lead times and steadier supply. Regional plants cut weeks off deliveries, and a second line means a color shortage at one plant does not stall the whole market. Builders can hold less inventory and still start the siding pass on schedule, which frees cash and yard space for other materials. Longer production runs also smooth out the seasonal swings that make exterior work a weather-dependent trade.
The payoff shows up at every scale of the industry, from a reimagined condo kitchen to a full re-clad of a suburban ranch, because more production capacity means siding arrives faster and in the specified color. Remodelers benefit most: their orders are small, so they are first to feel a shortage and first to feel relief when supply loosens.
What to Check Before You Specify
- Ask for current lead times on the colors and profiles you use most.
- Check how close the nearest plant is and how that affects freight.
- Confirm the warranty covers the factory finish, not just the board.
- Order touch-up material with the siding, not after the first nick.