1. All seams are arranged in the longitudinal direction consistent with the roof drainage. General shall make the flow direction and the longitudinal seams cross, to avoid longitudinal joints diffuse water phenomenon. Between the roof and the roof longitudinal seam joints between the board and the board using water-based structure, waterproof material, supplemented by a method, the gap does not appear the phenomenon of water under normal circumstances only waterproof structure, but in stormy weather, in flanging buckle slot between its side walls on steel sandwich panel, since the parts processing, installation and other reasons, can not be completely consistent color and is very smooth steel surface, the friction coefficient is very small, often appear slanting rain trans overshoot. Therefore, it is necessary to be waterproof material.
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