Roof Construction Methods for Residential Container Houses
The roof construction methods for residential container houses should be carried out from three aspects: structural reinforcement, structural layers and material selection, and construction steps, as detailed below:
Structural Reinforcement
The design load-bearing capacity of the roof panels of ordinary container houses is limited, necessitating structural reinforcement. First, calculate the expected roof loads, including live loads (people, furniture, equipment, typically designed at 2.0 - 3.0 kN/m²) and dead loads (insulation layers, waterproof layers, surface layers, etc.). Reinforcement options include adding purlins, which involves welding C-shaped steel or square steel tubes as secondary beams at certain intervals (e.g., 600 - 900mm) between the original roof beams of the container to form a new skeletal layer; and laying load-bearing panels, where profiled steel sheets (e.g., YX51 - 250 - 750) or OSB (oriented strand board) panels are laid on the purlins as the base layer. For large-scale or customized projects, such as customized container shelters produced by Hebei Dingli Cabinet Industry Co., Ltd., which have a steel structure with wall panel thicknesses up to 50 - 75mm and inherently high structural strength, they are suitable as the base framework for accessible roofs; for creative container buildings by Shenzhen Dahuangfeng Container Service Co., Ltd., the top beam structure can be reinforced by the manufacturer during customization to ensure the safety of subsequent modifications.
Structural Layers and Material Selection
A standard accessible roof for a container house typically consists of the following layers from bottom to top: the structural layer (reinforced container roof panel or newly added purlins + load-bearing panels), the vapor barrier layer (commonly a 0.2mm-thick polyethylene film), the insulation layer (commonly extruded polystyrene board (XPS), rock wool board, or polyurethane rigid foam), the slope-finding layer (lightweight concrete or mortar can be used for slope finding), and the waterproof layer (for membrane waterproofing, SBS modified bitumen waterproof membranes or polymer (PVC/TPO) waterproof membranes are recommended; for coating waterproofing, such as polyurethane waterproof coatings).
Construction Steps
First, construct the ceiling in layers by laying a ceiling made of fiberboard, covering it with a plastic film barrier, installing ceiling hangers, reserving holes for electrical wires, framing the ceiling structure with blocks, and laying the electrical wires; then proceed with waterproofing construction. For waterproof membrane construction, clean the base layer, apply adhesive, paste and roll-press, inspect and treat the joint seams, and conduct a water storage test; for coating waterproofing, taking the 'one fabric, two coats' method as an example, clean the base layer, apply the coating fully, lay fiberglass fabric, apply another coat of the coating to fix it, and proceed with the next application; the rigid waterproof layer should be laid about two days after the completion of the first flexible waterproof layer; finally, cover the top with glass, aluminum panels, color steel panels, etc., install steel structural keels, and apply sealant treatment.
