Some 30.1 percent of Manteca Unified classrooms were portables six years ago.

Since the passage of the $260 million Measure A school bond in November 2020, that percentage has dropped down to 21 percent.

Today, 310 of the district’s 1,404 classrooms are portables. The highest concentration is at Neil Hafley School where all the classrooms are portables.

There were 450 portable classrooms six years ago.

The district as part of its modernization effort is weeding out the oldest and most problematic portables.

Unlike permanent brick-and-mortar facilities, which are engineered for a 50- to 75-year life span, portables rely on components that degrade more rapidly.

Portables have a life expectancy of 20 years before significant expenditures are needed to keep safe to occupy.

Exposure to weather accelerates deterioration leading to leaking roofs, siding damage, and compromised insulation.

These issues not only reduce energy efficiency and comfort but also introduce health concerns if not property addressed.

Interior finishes, HVAC systems, and electrical infrastructure in portables often have shorter life spans that require frequent repairs or replacements.

Portable classrooms are intended as short-term solutions.

They can be deployed quickly to address immediate enrollment growth.

While they provide flexibility, their design prioritizes speed and cost-efficiency over durability.

The primary structure often includes a steel frame. That offers some longevity.

However, the surrounding materials such as wall panels, roofing, and flooring are typically lightweight and less resilient.

The cost-driven approach impacts lifecycle performance and creates long-term challenges for maintaining quality learning environments.

The 26 portables removed after the completion of the two-story, 26-classoom L-building and media center at East Union High were approaching 40 years in use.

To contact Dennis Wyatt, email dwyatt@mantecabulletin.com