Skylight panels12mNo joint required within, over12mIt requires splicing; the splicing length is:200 - 400mmSeal joints with two layers of sealant, no need to trim the edges for horizontal joints, and the longitudinal joints of color steel plates depend on the panel type. For ordinary corrugated steel sheets, it's generally not necessary to trim the edges. Simply fix them to the color panels with self-tapping screws and apply sealant.,The interlocking panels require edging. The longitudinal lengthwise overlap of the light boards should be positioned near the battens. The conventional classifications of light boards include: economic, weather-resistant, heat-insulating, flame-retardant, and corrosion-resistant, totaling five types. Common specifications of light boards are:750Type840Type820Type980Type950Style900Type475Type760Type, as well as1m-1.2mWide flat plates100A variety of board types available.