During the rainy season, stains spread on the ceiling, moldy smells, water stains running down the wallpaper... The most common cause is the aging of the rooftop waterproofing layer. The rooftop is the part of the building that endures the most rain, sunlight, and temperature differences, so if the waterproofing layer cracks or lifts, it immediately leads to water leaks.
In this article, we have summarized everything from , the signal that urethane waterproofing is necessary, , to , the 6-step construction process actually carried out by Jese Architecture on site, , and long-lasting management methods after construction.
If you see these signs, consider waterproofing work.
- Spreading on ceilings and walls Water stains Mold or mold
- Rooftop floor Cracks, lifting, peeling
- Fading/bulging of existing waterproof layer (green urethane/sheet)
- A phenomenon where water accumulates on the roof after rain and does not drain
If these symptoms are left unattended, the reinforcing bars inside the concrete may corrode, which could later lead to major repair work that cannot be solved with waterproofing alone. It is most economical to catch leaks in the early stages of .
Why is ‘urethane’ waterproof?
urethane waterproofing is a method of applying a liquid coating to create a single seamless waterproofing membrane . There is a reason why it is the most widely used in rooftop waterproofing.
- There are no seams, so water does not leak through the joints like sheet waterproofing
- Good elasticity (elasticity) It withstands the slightest movement of the building and temperature changes
- tightly adheres to complex corners and around pipes. is installed. Finishing with
- bright thermal insulation topcoat has the effect of lowering the rooftop surface temperature
Jese Architecture rooftop urethane waterproofing 6-step construction process
① Floor cleaning
Grind the contaminated surface or the existing floating waterproof layer with a hand grinder and clean it thoroughly. Cleaning the surface is such an important basic step that it can be said to determine more than half of the waterproof lifespan.
② Undercoat (primer) work
roller until it sufficiently penetrates into the floor. The undercoat serves to prevent lifting by firmly adhering the base concrete and the waterproofing film.
③ Silicone (corner/crack) reinforcement
Carefully fill the corners, cracks, and cracks of the building with silicone or putty. Most water leaks start at corners and cracks, so this reinforcement is a key point for waterproofing.
④ Intermediate work
neutralizer on the floor and spread it evenly with a rolling pin. The thickness is 2~3mm , which is the main body layer that creates the thickness and elasticity of the waterproof membrane.
⑤ Top coat work
middle coat has sufficiently hardened, apply the top coat with a roller. The top coat protects the waterproof layer from UV rays and abrasion and finishes the surface neatly.
⑥ Completed
This is a neatly finished rooftop. With a uniform coating and bright finish, achieves the waterproof performance and aesthetics of at the same time.
Materials used inconstruction — Green Waterproofing Master triple system
Jese Construction constructs with the proven Green Waterproofing Master base, middle and top coats system. has a three-layer structure of base coat (adhesive) → middle coat (waterproof film) → top coat (protection). has a three-layer structure, and each layer must play its role for long-term waterproofing.
Maintenance tips for long-lasting waterproofing
- Periodically clean fallen leaves and foreign substances from the rooftop drain (drain) to prevent water from accumulating.
- Do not drag heavy objects or scratch the paint film with sharp objects.
- Visual inspection every 2-3 years and simply adding a top coat when necessary significantly increases the lifespan.
Rooftop water leaks, Jese Construction will accurately diagnose them
Suitable construction methods and materials vary depending on the rooftop condition. Jese Architecture has been carrying out rooftop urethane waterproofing, exterior wall painting, and interior and exterior painting of commercial buildings at throughout the metropolitan area, including Bucheon and Incheon. If you suspect a water leak, do not neglect it and get an accurate diagnosis first.
📞 Consultation/Quote Inquiry: 010-6314-9810 (Jese Architecture)
Rooftop urethane waterproofing construction process at a glance
- Floor cleaning Grind and clean existing contaminated and loose paint using a grinder.
- Undercoat (Primer) Apply primer with a roller to firmly adhere the base and the paint film.
- Silicone reinforcement Fill corners and cracks with silicone or putty.
- Middle Coat Spread the middle coat evenly to a thickness of 2~3mm.
- Topcoat The next day, apply a topcoat to protect the waterproof layer from UV rays and abrasion.
- completion Completes a seamless waterproofing membrane with a uniform coating.
Frequently Asked Questions (FAQ)
How many years should roof waterproofing be done?
Urethane waterproofing is usually recommended to be inspected and re-installed at intervals of 5 to 10 years depending on construction quality and environment. If lifting, cracks, or water pooling are visible, inspection is required regardless of the cycle.
What is the difference between urethane waterproofing and sheet waterproofing?
Urethane is applied with a liquid coating to create a seamless waterproof membrane, and the sheet is attached to a waterproof sheet. Urethane adheres well to corners and complex shapes and makes partial repairs easy.
In what season is waterproofing work done?
Spring and fall are the right times as the paint film hardens well. It is best to avoid the rainy season and cold weather as it is unfavorable to curing and adhesion.
Can I apply additional waterproofing on top of the existing waterproofing layer?
Existing paint film that is lifted or swollen must be ground and repaired. Surface Cleanup If you do additional waterproofing without , it will soon lead to peeling and defects.
right after waterproofing?
After applying the top coat, sufficient curing time (usually 1 to 2 days) is required. Avoid walking or standing water before curing.
