Different Ways to Build Modular Homes
Once you start learning about modular homes, you’ll find that there are many different building methods within the modular home construction sector.
How are modular homes built?
To start with the basics, modular homes, also known as prefabricated or prefab homes, are constructed in a factory and then assembled on-site. Prefab homes offer several benefits, such as rapid build times, improved cost control, and low-waste constriction. There are several ways to build modular homes, each with its unique characteristics. Some modular builders combine multiple methods in order to achieve the ultimate balance of efficiency and customization for their clients.
A modular home section is craned into a Salt Lake City backyard for installation as an ADU (accessory dwelling unit)
Panelized Construction
In panelized construction, the walls, floors, and roof components of the modular home are prefabricated in large panels at the factory. These panels are then shipped to the construction site where they are assembled to form the final structure. This method allows for precision and rapid assembly during installation.
Volumetric Construction
Volumetric construction involves building fully-enclosed sections or modules of the home in the factory. These modules are usually complete rooms with finishings and fixtures. Once the modules are complete, they are transported to the site and stacked or connected to create the final home. This method is popular for creating multi-story buildings and can significantly reduce construction time.
Panelized Volumetric Hybrid Construction
This approach combines panelized and volumetric construction techniques. Some parts of the home, such as walls and floors, are constructed as panels, while other sections, like bathrooms and kitchens, are built as volumetric modules. This hybrid method offers greater flexibility in design and allows for customization of individual rooms.
SIPs (Structural Insulated Panels) Construction
SIPs consist of a foam core sandwiched between two layers of oriented strand board (OSB). They are prefabricated in the factory and used as the walls, floors, and roofs of modular homes. Under the umbrella of panelized building, SIPs construction provides excellent insulation, energy efficiency, and rapid assembly.
Flat-Pack Construction
Similar to the way flat-pack furniture is delivered, flat-pack modular homes come as prefabricated components that are transported to the construction site. These components are typically designed to be assembled like puzzle pieces, reducing the need for complex tools and heavy machinery during construction. Unlike traditional modular homes, flat pack construction usually does not include plumbing and finishings.
Steel Frame Construction
Modular homes are sometimes built using a steel frame instead of traditional wood framing, either from repurposed shipping containers or steel framing created specifically for the project. Steel-framed modular homes offer excellent durability, resistance to pests, and better structural integrity. They are also more suitable for areas prone to extreme weather conditions.
Precast Concrete Construction
For projects in which concrete is the favorable building material, certain parts of the home or large building, such as walls and foundation components, are constructed using precast concrete. Precast concrete modular homes are particularly suitable for regions with seismic activity.
Choosing the modular building method for your project
While all modular homes offer the benefits of sustainability, reduced waste generation, and shorter construction timelines compared to traditional construction, choosing the right method for your project will depend on your budget, design preferences, site location, and local building regulations, as well as the availability of labor and delivery access in your area. To ensure an on-time and on-budget modular home or building, make sure you understand the full process from start to finish, which will give you a clear idea of the timeline, budget, and any associated requirements to create your project. Also consider the location of the builder you work with, which will influence delivery and installation costs.