Johan Alfa Reza

As a urethane spray waterproofer at GSC Co., Ltd. in Fujisawa, Japan, I was involved in a variety of challenging construction projects, including:

• Waterproofing the roof of a 10,000 square meter high-rise building in downtown Kawasaki. This project required careful logistical planning and effective time coordination to meet tight deadlines.
• Waterproofing balconies and terraces of residential apartments, ensuring maximum protection against air leakage using precision urethane spray application techniques.
• Repairing and waterproofing concrete structures damaged by exposure to extreme weather. I used special urethane spray materials to restore the strength and durability of the structure.
• Waterproofing building foundations, using high-pressure machinery and tools.

I have a deep understanding of Japanese construction quality and safety standards, and am able to communicate effectively with the team and clients.