How to Make a Prefabricated Roof for a House

There are mainly two forms of prefabricated roofs for houses: concrete prefabricated panel roofs and prefabricated panel ceilings. The specific methods are as follows:

Concrete Prefabricated Panel Roof

1. Pre-construction Preparation
   • Determine Design Drawings: Clarify key information such as the dimensions of the house and the slope of the roof. This is the foundation for subsequent construction, ensuring that the shape and size of the roof meet design requirements.
   • Determine Material Specifications and Quantities: Based on design needs, determine the specifications and quantities of concrete prefabricated panels to be used, avoiding material shortages or waste during construction.
   • Prepare Construction Tools and Equipment: Prepare necessary construction tools and equipment such as steel bar cutters, spirit levels, and plastering tools to ensure smooth construction.
   • Ensure Construction Site Safety: Set up scaffolding to provide a safe working platform for construction personnel. Place warning signs to remind surrounding personnel to pay attention to safety and avoid accidents.
2. Specific Construction Steps
   • Determine the Starting Point of the Roof: Use a spirit level and measuring tools to make precise measurements based on the size and slope information in the design drawings, ensuring accurate horizontal and slope levels of the roof, which directly affect the drainage effect and overall stability of the roof.
   • Lay Steel Reinforcement Mesh: On the roof foundation, lay a pre-made steel reinforcement mesh according to design requirements. The layout of the steel reinforcement mesh should strictly comply with the design drawings, and ensure a firm connection between the mesh and the foundation to enhance the load-bearing capacity of the roof.
   • Lay Concrete Panels: Lay the prefabricated concrete panels one by one on the steel reinforcement mesh. Before laying, ensure that the surface of the concrete panels is clean and apply a layer of waterproof coating in advance. The gaps between the panels should be kept as consistent as possible, and expansion joints should be reasonably set according to design requirements to prevent cracking of the concrete panels due to temperature changes.
   • Plastering and Curing: After laying the concrete panels, use plastering tools to plaster them to make the surface flat. After plastering, promptly carry out curing on the construction site, including watering and shading, to ensure normal drying of the concrete panels and enhance their strength.
   • Waterproofing Treatment: After curing the concrete panels, use appropriate waterproof materials to brush or lay them on the roof surface to ensure the integrity and durability of the waterproof layer and prevent roof leakage.

Prefabricated Panel Ceiling Method

- **Process Circular Hole Panels**: Find the holes in the circular hole panels, use a hammer to open a hole about 80 long and 40 wide, and then place a steel bar about 200 long and 14 in diameter in the panel hole.
- **Fix Wooden Blocks**: Make wooden blocks measuring 40 * 40 and about 150 long, and bind them firmly to the steel bars with No. 8 lead wires to provide stable support points for subsequent installation of the main keels.
- **Install Main Keels**: Use hanging pieces to connect the main keels with the wooden blocks, completing the framework construction of the prefabricated panel ceiling.