What Is the Connection Treatment Solution Between UHPC Exterior Walls and Door/Window Openings? — Qinglong Group's Waterproofing and Sealing Technology Explained

The connection between UHPC exterior walls and door/window openings is a critical waterproofing joint, requiring systematic design to ensure reliable sealing. Qinglong Group adopts a combined strategy of "guiding, draining, and blocking," achieving seamless connections through precise positioning of embedded parts, multiple sealing layers, and drainage design, with a leakage rate below 0.01%.

Embedded part positioning is the foundation. Connection fittings are pre-embedded at door/window frame installation positions, constructed simultaneously with the UHPC panels. Qinglong Group uses BIM technology for precise positioning, with a tolerance of ≤3mm. The area around embedded parts is reinforced to prevent cracking. The connection system allows fine adjustment to accommodate installation tolerances. This precise positioning creates the conditions for subsequent sealing.

Multiple sealing layers are the core. Foam sealant fills the interior side, sealant in the middle serves as the primary defense, and flashing on the exterior guides water away. Qinglong Group prefers silicone sealant with a movement capability of ≥25% and durability of over 20 years. Drainage cavities are fitted with weep holes to promptly discharge infiltrated water. Sloped design directs water flow to prevent accumulation. Multiple layers of protection ensure foolproof performance.

Regular maintenance preserves performance. Check sealant elasticity and replace it promptly. Clean drainage holes to keep them clear. Qinglong Group recommends an annual inspection, with intensified checks before the rainy season. Through systematic treatment and maintenance, the connection areas remain reliable over the long term.