Prefabricated Houses Are Installed on Site

Step-by-Step Guide: How Prefabricated Houses Are Installed on Site

Prefabricated houses, modular prefab homes in other words, provide a modern, efficient and green replacement to traditional buildings. They are well known for their fast-locating process. Let’s delve into a close inspection on how these prefab houses go from factory to the final home in this article. We will break down every step of the process to help you have a clear understanding of the process. 

Many modular homes follow a similar on-site installation process, where factory-built sections are delivered, assembled, and finished on the project site.

1- Site Preparation and Foundation Work


Before installation, the land must be prepared well by clearing debris, leveling the land, and marking utility access points. The foundation should be solid by applying concrete or piers to anchor the structure. This would ensure long-term stability and compliance with local building codes and regulations. Installed at the base of the structure, these profiles form the foundation of the steel skeleton for the modular home.

2- Installation of Base Steel Frame [U] Profiles

The first structural element to be added is the U-shaped steel frame profile at the base which is fastened to the structure to form a continuous outer edge that does the job of the framework. It forms the base of the wall panel installation and provides alignment and structural stability to the whole building.  

3- Wall Assembly: Steel Frame [H] Profiles and Wall Panels

The H shaped steel frame profiles are positioned vertically to separate and support the wall panels. They provide reinforcement and ease in modular assembly to make sure the walls are secured well and resistant to any shifts or external impacts like high wind and seismic activities.  Fiber cement board are attached to form the external and internal walls, offering strength and insulation to the modular home.

4- Top Frame Installation: Steel Frame [U] Profiles

The second U-shaped steel frame profiles are mounted at the top of the wall panels to give a sturdy ring beam that ties the vertical elements together. They also prepare the structure to carry the load of the ceiling and roof while maintaining the geometric integrity of the building. 

These top profiles lock the structure in place and provide support for the roof of the prefabricated house.

5- Roof Trusses Installation

Up next, high-tensile steel roof trusses are installed to create the roofing. These sturdy trusses go along the U-profiles and are anchored well to form a stable roof structure against wind and seismic activities. At this stage, steel roof trusses are mounted on top of the wall structure. These trusses shape the roof and support its weight. They are critical to the strength and stability of the prefabricated house, especially in areas prone to wind or heavy snowfall.

6- Ceiling Construction: Omega Profiles and Gypsum Boards

Now for the Omega steel frame profiles which gained this name for their unique shape. They are added under the roof trusses to hold the ceiling panels. They are made to bear excessive loads and create a pathway for electrical wiring and HVAC ducting yet offering a great insulation.

Inside the prefabricated house, ceiling omega profiles are installed to support the ceiling surface. On these, gypsum boards are mounted to create a smooth and paintable ceiling finish. This setup allows for both form and function, providing the modular home with a clean interior look.

7- Ceiling Insulation: Rock Wool Installation

The interior ceiling holds the gypsum boards that are attached to the omega profiles. They are fire-resistant and create a smooth, clean surface that enhances the room’s presentation and improves safety against fire-resistant and adds an important layer of protection and comfort to the prefabricated house.

Rock wool insulation goes above the ceiling and helps keep the house warm in winter and cool in summer. It also eliminates noise from outside and they are great at stopping fire, making the home safer.

8- Roof Structure Completion: Purlins and Gutters

Purlins are metal bars that go across the roof frame. They hold up the roof covering and help spread the weight of snow or rain so the roof stays strong and safe.

Gutters are placed along the roof edges and can catch rainwater and move it away from the house. This stops water from damaging the walls and foundation over time. Horizontal roof purlin profiles are installed across the trusses to support the final roofing materials. Gutters are added along the edges to ensure proper water drainage, protecting the building from moisture damage.

9- External Wall Cladding: Fiber Cement Boards

The outside of the modular home is clad with fiber cement boards. The outside walls get covered with fiber cement boards which helps protect against bad weather and make the house look nice. They also help keep heat inside or outside, like stone or wood walls do.

10. Roof Covering: Sheets or Shingles

Metal sheets or asphalt shingles are put on the purlins. These roof coverings help keep the building safe from rain, wind, and sun. They also finish the outside look of the building. These options provide waterproofing and complete the roofing system of the modular home, making it weather-tight and ready for occupancy.

11. Eaves Installation

Eaves go beyond the walls of the roof to move water away from the building and give shade. They also help to cool the house naturally and make it aesthetically pleasing. This finishing detail helps protect the siding and foundation of the prefabricated house, extending its lifespan.

12. Exterior and Interior Tiling

External tiles are installed on outdoor steps, porches, or facades, while internal tiles are laid on floors inside the home. This adds both function and visual appeal to the prefabricated house, especially in high-traffic or wet areas.

13. Wall Ceramic Tiles


Ceramic tiles are put on bathroom and kitchen walls. They do not get damaged by water easily and are simple to keep clean and they also protect walls from moisture and stains.

14. Door Installation

All internal and external doors are installed to secure the modular home. They are measured to fit perfectly in their frames. Doors are made strong to save energy and keep the house safe.

15. Window Installation

Windows with good energy-saving features are installed next. They have double glass layers for warmth and noise control. These windows help keep rooms comfortable and lower energy costs.

16. Sanitary Fixtures Installation

Sinks, toilets, showers, and other bathroom or kitchen fixtures are put in place now. They connect to pipes that were set up before so everything works well and stays clean.

17. Electrical & Lighting Fixtures


The last step is putting in electrical parts like sockets, switches, and lights. All these parts are checked carefully to be safe and work properly every time.

Finish Prefabricated House Installing: Precision, Speed & Modern Design

Assembling a modular home or prefabricated house involves a well-orchestrated process of steel framing, insulated panels, roofing systems, and precision-fit finishes. The installation process of prefabricated homes is done within a secure and collaborative procedure that ensures fast turnaround, eco-friendly and modern styling. The components from steel frames to ceramic tiles play a significant role in delivering a home that is structurally sound, aesthetically pleasing and ready for occupation.