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How to Install Skylights in Buildings
Release time:
2026-09-03
Installation & Waterproofing Details
Professional‑grade skylight installation relies on a well‑engineered curb‑mounted waterproof system on the roof, which is critical to prevent water leakage and guarantee long‑term stable operation. Below is a detailed introduction to core installation procedures and waterproofing solutions.
The skylight frame shall be mounted onto a pre‑fabricated concrete curb and firmly fastened by aluminum angle brackets together with expansion bolts. These aluminum fittings and expansion bolts deliver solid structural anchoring, greatly improving overall wind‑resistance capacity for the whole skylight unit.
Once frame positioning is finished, gaps between the skylight frame and concrete curb are filled with polyurethane foam for gap filling and buffer support. Weather‑resistant silicone sealant is subsequently applied along all joint seams to create supplementary waterproof barriers. Meanwhile, factory‑fitted EPDM rubber gaskets built into the skylight serve as the primary sealing layer between sash and frame.
Multi‑layer waterproofing is formed by combining polyurethane foam filling, weather‑resistant silicone sealant and EPDM rubber gaskets. With standardized installation procedures, this composite system achieves dependable wind‑proof performance and durable waterproof effects for long‑term service.
To obtain optimal waterproof outcomes, follow the correct construction sequence: complete the roof waterproof membrane first, then build the concrete curb, and lastly install the skylight frame. The waterproof membrane must be fully integrated with the concrete curb in advance. Direct installation onto raw, untreated concrete curbs will compromise sealing performance at roof‑curb joints. Proper pre‑treatment of roofing structures effectively safeguards connections between skylights and building substrates.
No. 4, No. 1 Hongling East Road, Changhongling Phase II Industrial Park, Xingxian, Shishan Town, Nanhai District, Foshan City