Container House Roof Sealing

For container house roof sealing, it is crucial to focus on material selection, sealing processes, and regular maintenance. Key measures include using specialized sealing strips, standardizing the sealing assembly process, and regularly inspecting and replacing sealing components.

1. Sealing Material Selection

Sealing materials directly affect sealing effectiveness and durability. It is recommended to use ethylene propylene diene monomer (EPDM) rubber sealing strips, which are resistant to high and low temperatures (-40°C to 120°C), UV rays, and aging. They do not harden or deform easily over long-term use, making them the mainstream material for outdoor container sealing. For example, the Coolstick container airtight door uses EPDM foam sealing strips, with corners processed through integral vulcanization molding to completely eliminate the risk of water leakage from splices. For doors, windows, and joint seams, it is necessary to choose outdoor neutral weather-resistant sealants with strong adhesion to the substrate, ensuring the sealant is full without bubbles and forms a flexible sealing layer after curing.

2. Sealing Process Specifications

The sealing process should follow the principle of "continuous around the perimeter and seamless adhesion." Areas such as around doors and windows, container body joint seams, and roof gutters require special attention:

1. Pre-processing Stage: Clean dust, oil, and protruding foreign objects from the adhesion surfaces of door frames and door panels. The card slots should be sanded smooth to prevent impurities from causing poor adhesion of the sealing strips.
2. Sealing Strip Assembly: Adopt an integral continuous inlay process, abandoning segmented splicing. Corners should achieve seamless sealing through integral vulcanization molding. After embedding the sealing strip into the card slot, it should be precisely compressed, with a uniform exposed height and a flatness error controlled within 0.3mm.
3. Structural Sealant Application: For fine areas such as welds, corner seams, and hardware installation holes, fully apply outdoor neutral weather-resistant sealant to form a second waterproof barrier. Scenarios with high airtightness requirements (such as cold chain compartments) need to add internal sealing pads, adopting a double-layer composite structure to enhance protection levels.

3. Regular Maintenance and Replacement

Sealing components will age and fail over time and require regular inspection and replacement. It is recommended to replace the sealant around doors and windows and joint seams every 5-7 years, which can be shortened to 3-5 years in humid southern regions. Regularly clean fallen leaves from the roof to prevent water accumulation from corroding the steel plate; inspect welds, wall corners, and the bottom for rust-prone areas, and immediately sand and repaint small rust spots to prevent rust expansion from damaging the sealing. For example, when container houses are used in coastal areas, due to severe salt spray corrosion, the sealant replacement cycle should be shortened to 3 years.