Lotte Construction Obtains Construction New Technology Certification for 'Dry Exterior Insulation Installation'

[Asia Economy Reporter Donghyun Choi] Lotte Construction announced on the 24th that it obtained a new construction technology certification (No. 901) on the 16th for an exterior insulation construction method using external insulation.

This new technology was jointly developed by Lotte Construction, Ssangyong Construction, Tipus Korea, and Saint-Gobain Isover Korea, and its official name is "Dry Exterior Insulation Construction Technology Using Truss Insulation Frame and Water-Repellent Glass Wool."

The existing dry exterior insulation construction was vulnerable to building heating and cooling energy loss and condensation due to thermal bridging (a phenomenon where heat enters or escapes through areas where the building's insulation is weakened or interrupted) occurring in the steel frames used as structural frames.

To solve the problems of the existing method, the new technology uses a truss insulation frame with thermal bridge blocking functionality. The structural frame for the exterior material is made by assembling bolts without welding in all processes using the truss insulation frame. After inserting water-repellent treated glass wool to prevent insulation performance degradation caused by moisture absorption between the structural frames, an external vapor-permeable waterproof sheet and an internal vapor barrier sheet are installed. This dry exterior insulation construction technology improves insulation performance and ensures fire safety.

Lotte Construction applied this new technology at sites such as the "Gimhae Tourism Distribution Complex Sports Center," achieving more than a 20% improvement in insulation performance compared to existing dry exterior insulation construction, reducing construction costs by 12%, and expecting more than a 15% reduction in maintenance costs.

A representative from Lotte Construction's Technology Research Institute said, "This new technology is excellent as it enables building energy savings through revolutionary thermal bridge blocking and ensures fire safety by using non-combustible materials and a welding-free method," adding, "We plan to continuously expand the application of new technologies to realize zero-energy buildings."