DUOWEI 470 standing seam type metal roof system adopts detailed design such as slipping board holder, daylighting band and closed edge, etc and has good expansion and contraction resistant capacity and excellent waterproof performance. Roof boards are to be pressed at the site, which can save long-distance transportation cost; moreover, length can be cut according to site and building width requirements, thereby minimizing the material to be used for lapping and making the roof system more economic.

System introduction:
180° seam clipping connection increases leakproofness and leakage prevention of the roof. Certain relocating of the roof offsets the stress caused by expansion and contraction, thereby reducing the damage to the roof. Small slope and high strength can withstand strong typhoon. Screws are invisible on the surface.
820 curved tiles: Exposed screw connection, applicable to roof and wall; tapping screws are to be fastened on corrugation peak for the roof and on corrugation hollow for the wall. The corrugation has beautiful shape, excellent water resistance, and is economical.

Features:
180° seam clipping connection increases leakproofness and leakage prevention of the roof. Certain relocating of the roof offsets the stress caused by expansion and contraction, thereby reducing the damage to the roof. Small slope and high strength can withstand strong typhoon.