Leave your waterproofing work in Adachi-ku, Tokyo to Kakeru Koumuten Co., Ltd.!
If you are looking for a waterproofing contractor in Adachi-ku, Tokyo,
please contact Kakeru Koumuten.
Kakeru Koumuten specializes in exterior renovations.
We receive many requests for waterproofing work from single-family homes to apartment buildings in Adachi-ku, Tokyo.
“Reasons why Kakeru Koumuten is chosen in Adachi-ku”
“About the costs of waterproofing work”“
“How to choose a waterproofing contractor”
“About subsidies and grants applicable to waterproofing work in Adachi-ku”
We will explain the above four points!
This will definitely be helpful for customers considering waterproofing work in Adachi-ku, so
please take a look!
Reasons why Kakeru Koumuten is chosen for waterproofing work in Adachi-ku, Tokyo
Regarding the reasons why our company is entrusted with waterproofing work by customers in Adachi-ku, Tokyo,
“Our strengths in waterproofing work that cannot be imitated by other companies” have received high praise from many customers.
We have absolute confidence in “cost,” “quality,” and “plans,” so we would appreciate it if you could compare our estimates with those of other companies.
Because we are confident, we welcome competitive estimates!
1.Facilities Specialized in Exterior Renovation
Kakeru Koumuten Co., Ltd. has prepared the following warehouses and material storage areas to provide more affordable and faster waterproofing and other exterior renovations.
We have established five bases centered around Aoba-ku, Yokohama for material storage and showrooms.
In-House Scaffolding Materials


We own the scaffolding materials necessary for temporary scaffolding required for waterproofing work, allowing us to assemble temporary scaffolding in-house.
By performing scaffolding work with our own scaffolding team instead of outsourcing, we can also reduce the costs associated with scaffolding work.
Since everything is handled in-house, we can significantly reduce costs by shortening the construction period!
We have enough scaffolding materials for approximately 50 single-family homes!
Storage of materials in our large in-house warehouse

We store roofing materials and waterproofing components.
By ordering a large quantity of materials at once, we can purchase materials at a lower cost!
Additionally, we always have waterproofing components in stock, allowing us to respond quickly to emergency waterproofing work!
In-house sorting of waste materials
In waterproofing work, various waste materials are generated.
Most contractors dispose of them all together, but by sorting and recycling waste materials, significant cost reductions in waste disposal can be achieved.
Exterior Renovation Dedicated Showroom


In our showroom, not only can you have meetings, but you can also directly check the actual structures and colors.
2.Complete In-House Construction
One of Kakeru Koumuten’s major strengths is complete in-house construction.
From inquiry to project completion, everything is handled by Kakeru Koumuten Co., Ltd. This allows us to keep costs down while providing high-quality waterproofing work.
Additionally, one representative will assist you from the estimate to the completion of the project.
Since the same person will handle sales and construction management, smooth communication is possible.
We are confident in our construction plans and costs, so we welcome competitive estimates!
3. Various Permits and Skilled Workers

We have obtained construction industry permits and permits for industrial waste collection and transportation!
We also have qualified personnel on staff, and we are confident in our construction techniques.
We are capable of handling large-scale waterproofing projects, such as those for factories!
4. Warranty and Aftercare Maintenance
Waterproofing work comes with a guarantee!
Depending on the type of waterproofing work, we provide a 5 to 10-year leak guarantee.
If you have any questions about the guarantee, please click the image above!
In the unlikely event that leaks are not resolved after the waterproofing work, we will take responsibility and address the issue!
Additionally, aftercare maintenance is available every year, and we will send you a DM reminder for aftercare maintenance each year.
During aftercare maintenance, we will check the entire waterproofing system and assess the condition of any deterioration.
5. Flexible and Prompt Response
Our company is equipped to handle various troubles and situations.
If we cannot access the roof for waterproofing checks, we will utilize drones to assess the condition.
During leak investigations, we can also conduct inspections using thermal imaging cameras.
We will respond according to your wishes.
We also accept emergency measures for sudden leaks!
Since our sales and construction management are not separated, one dedicated representative will handle everything from the estimate to the completion of the work!
Changing representatives frequently can lead to miscommunication regarding the details and precautions of the work, which can cause problems, so our company maintains a system where the representative remains the same.
6. Human Resource Development
We are creating various building models to improve our skills and conducting practical training.
To ensure that all staff can handle various buildings, we regularly conduct skill enhancement training.
Subsidies and Grants for Waterproofing Work in Adachi-ku, Tokyo
Tax Reduction for Promoting Longevity of Condominiums (Property Tax Reduction)
Requirements for Tax Reduction for Promoting Longevity of Condominiums
Condominiums over 20 years old
Total number of units: 10 or more
Completion of longevity improvement work at least once in the past + completion of the second or subsequent work between April 1, 2023, and March 31, 2027
Condominiums with a management plan certification or those that have received advice and guidance from the municipality to develop or review a long-term repair plan
The residential floor area of the exclusive part occupies more than 50% of the total
Details of Tax Reduction
Eligible: Property tax on the building portion imposed in the year following the completion of the work.
Maximum Reduction: Up to equivalent to 100㎡ per unit
Tax Reduction Rate: The tax amount within the above range is reduced by 1/2 (50%)
Others
If damage due to natural disasters is recognized, it may be covered by fire insurance.
In terms of waterproofing, examples of damage from natural disasters include “holes in waterproof sheets caused by flying objects or falling debris due to wind damage.”
If you are unsure whether it is covered by fire insurance, please feel free to contact us!
About the Costs of Waterproofing Work
⇧ For construction menu | Click here for waterproofing costs
Examples of Waterproofing Work
| Construction Details |
| Urethane waterproofing ventilation buffer method / High-strength urethane type Existing waterproofing: PVC sheet waterproofing |
| Materials Used |
| Waterproofing: AGC polymer building materials / Saracene A (high-strength urethane) Ventilation sheet: QV sheet Vent pipe: Stainless steel Replaced with a renovation drain |
| Price Range |
| 700,000 to 800,000 yen |
| Construction Period |
| Approximately 2 weeks |
| Completion Month |
| May 2024 |
| Inquiry Details |
| We have received the following inquiries from our customer: ・There are wrinkles and bulges in the rooftop waterproofing sheet, so we are worried about leaks. ・We would like an estimate for a complete waterproofing renovation, not just partial repairs or a top coat. ・We learned that urethane waterproofing has high waterproofing properties and would like an estimate for urethane waterproofing. ・Since this is our first waterproofing project, we would like to compare estimates. |
Our Proposal
Since you expressed a desire to renovate using a long-lasting method rather than protective agents like top coats, we proposed a complete “urethane waterproofing project” for the rooftop.
If urethane waterproofing is applied using the adhesion method, air rising from the building can cause bulges in the waterproof layer, so we proposed the “urethane waterproofing ventilation buffer method.”
The ventilation buffer method involves applying a ventilation buffer sheet over the entire area before installing the urethane waterproofing.
By applying the ventilation buffer sheet first, we can suppress the air rising from the building and discharge it through a “ventilation pipe.”
This can prevent the most common issue with waterproofing, which is bulging of the waterproof layer!
After explaining the materials and methods, you entrusted us with the project among four competing estimates!
Timing for Waterproofing Work
If Leaks Have Already Occurred
If leaks have already occurred, it is necessary to address them promptly before the damage spreads.
If left unattended, it can negatively affect the interior and underlying structures, so it is essential to stop the leaks quickly.
Bulging or Cracking of the Waterproof Layer
If the waterproofing area is cracked, it can lead to rainwater intrusion.
If the waterproof layer is bulging, it indicates that moisture is accumulating within the layer.
Bulging can lead to cracks and eventually to leaks, so early detection and action are necessary.
Growth of Moss or Mold
Moss or mold can develop due to accumulated moisture or rainwater.
This can be caused by poor drainage or sinking of the waterproof layer due to aging.
If the Durability Period Has Been Exceeded
Generally, the durability period for waterproofing work is between 10 to 20 years.
Of course, the durability can vary depending on the construction method and materials, but for some types of waterproofing, it is recommended to apply only the surface protective agent (top coat) approximately every 8 years (such as urethane waterproofing or FRP waterproofing).
We recommend regular inspections starting from 5 years after construction.
Understanding the types of waterproofing and performing appropriate maintenance is crucial.
If you are unsure about the type of waterproofing, please send us a photo via email or LINE, and we will help you determine it!
Types of Waterproofing Work
1. Urethane Waterproofing
Urethane waterproofing is a method that involves applying liquid polyurethane resin to the waterproofing surface.
Before curing, it is in liquid form, allowing it to be applied to complex shapes and, unlike sheet waterproofing, it can be installed without seams. This makes it suitable for a wide range of applications, including balconies and rooftops.
We provide detailed explanations of the advantages, disadvantages, and maintenance methods of urethane waterproofing in the article below.
For more information on waterproofing work | Urethane waterproofing, click here!
2. Rubber Sheet Waterproofing
Rubber sheet waterproofing is a method that involves adhering synthetic rubber sheets to the surface to prevent water intrusion.
It is commonly used for large areas such as rooftops.
Compared to urethane waterproofing, it has the advantage of faster installation since there is no waiting for drying, but it is not suitable for complex surfaces.
We provide detailed explanations of the advantages, disadvantages, and maintenance methods of rubber sheet waterproofing in the article below.
For more information on waterproofing work | Rubber sheet waterproofing, click here!
3. PVC Sheet Waterproofing
PVC sheet waterproofing is a waterproof sheet made of polyvinyl chloride, and like rubber sheet waterproofing, it is applied to the surface to prevent water intrusion.
Similar to rubber sheets, it is not suitable for complex shapes. Although the cost is higher than rubber sheets and urethane waterproofing, its long durability is a significant advantage.
For more details on the advantages and disadvantages of PVC sheet waterproofing and maintenance methods, please refer to the article below.
For waterproofing work | Click here for information on PVC sheet waterproofing!
4. Long Sheet Waterproofing
Long sheet waterproofing, officially known as “anti-slip vinyl floor sheet,” is commonly used in shared areas and staircases of apartments where people walk.
As the name suggests, it is slip-resistant and has high durability and abrasion resistance, making it suitable for walking areas.
Additionally, it comes in various designs, excelling in aesthetic appeal.
However, it tends to be more expensive, and since it does not overlap seams like rubber sheets or PVC sheets, it may give a slightly lower impression of waterproofing capability.
It is rarely used in areas like apartment rooftops where people do not frequently enter.
For more details on the advantages and disadvantages of long sheet waterproofing and maintenance methods, please refer to the article below.
For waterproofing work | Click here for information on long sheet waterproofing!
5. FRP Waterproofing
FRP waterproofing involves creating a waterproof layer by solidifying glass mat with epoxy resin to prevent rainwater intrusion.
It is commonly used in single-family home balconies, with an overwhelmingly short construction period, often completed in as little as one day.
Due to its lightweight and low cost, it is estimated that about 80% of single-family home balconies use FRP waterproofing.
However, it is not suitable for installation on large areas, making it less appropriate for rooftop applications.
For more details on the advantages and disadvantages of FRP waterproofing and maintenance methods, please refer to the article below.
Waterproofing Work | Click here for FRP Waterproofing!
6. Asphalt Waterproofing
Asphalt waterproofing is a waterproof sheet that has asphalt permeated into synthetic fiber non-woven fabric.
The waterproofing shown in the photo is a method where asphalt waterproofing is pressed down with cinder concrete.
This waterproofing is used in buildings with large areas such as rooftops of schools and commercial facilities.
There are various methods of asphalt waterproofing, each with its own advantages and disadvantages, but a significant advantage is its high durability.
For more details on the advantages, disadvantages, and maintenance methods of asphalt waterproofing, please refer to the article below.
Waterproofing Work | Click here for Asphalt Waterproofing!
How to Choose a Waterproofing Contractor
There are many waterproofing contractors available in Adachi-ku, Tokyo.
Among the numerous contractors, I believe there are many people who feel, “I don’t know who to ask…”
Choosing the right contractor can be challenging at first, so I will explain 5 points to keep in mind when requesting waterproofing work.
● Have extensive experience in waterproofing work
● Check for aftercare and warranty availability
● Obtain estimates from multiple contractors (at least 3 companies)
● Confirm whether they perform waterproofing work in-house
● Carefully check the details of the waterproofing estimate, including processes and materials used
By confirming the above 5 points, you will be able to choose a reliable contractor.
Confirm whether they have extensive experience in waterproofing work
About 10-20% of waterproofing work troubles are caused by construction defects during the installation.
To prevent troubles, it is important to hire a reliable contractor with ample experience!
You need to refer to the contractor’s website for their past work and reviews to make a judgment.
Some contractors showcase their achievements on social media platforms like Instagram, so checking those can also be effective!
It is also effective to look at waterproofing companies on review sites for reference!
The review site I particularly recommend is “Google”.
Since contractors cannot arbitrarily delete low ratings, it provides trustworthy reviews.
If there are many negative reviews or no reviews at all, it may be wise to refrain from making a request.
Check if there is aftercare maintenance and construction warranty
In case any construction defects or issues occur after the work, let’s confirm if they provide a “construction warranty“!
Contractors who offer a warranty are usually confident in their work, making them more trustworthy!
If waterproofing work is done, make sure to have photos taken of hidden areas and other processes for confirmation!
Check for leaks during rainy weather after the waterproofing work, and if there’s any issue, contact the contractor immediately as it will facilitate smooth communication shortly after the work is completed!
Additionally, to ensure early detection of any issues that may arise, confirm if they provide thorough aftercare maintenance!
Since non-specialized contractors may not notice signs of problems or troubles, having a specialized contractor conduct regular aftercare maintenance can help prevent issues before they arise!
Our company sends out aftercare maintenance DM every year, so if desired, annual aftercare maintenance is possible!
Obtain estimates from multiple contractors (at least three)
When requesting waterproofing work, always obtain estimates from multiple contractors.
We recommend obtaining estimates from at least three companies.
Even for the same waterproofing work, costs may vary between contractors, and warranties and after-services may differ as well.
Moreover, obtaining multiple estimates makes it easier to negotiate prices. To request at the lowest possible cost, obtaining estimates from several contractors is essential.
When comparing estimates, check not only the costs but also the “types of materials used” and “construction methods,” and compare the finer details!
Check if they perform waterproofing work in-house
Let’s confirm whether we conduct waterproofing work in-house!
If a sales company investigates and then requests a subcontractor, it can lead to additional time and costs.
Moreover, there are cases where customer requests are not 100% communicated to the subcontractor, which can lead to troubles.
By having one company handle everything from sales to construction, we can provide responsible waterproofing work that is quick and cost-effective. Kakeru Koumuten Co., Ltd. conducts everything from on-site surveys to actual construction in-house!
Additionally, in the unlikely event that a leak or trouble occurs, a company that employs its own craftsmen can respond to and resolve issues quickly!
Carefully check the details of the waterproofing estimate, process, and materials used
Even for the same waterproofing work, there are various types such as “methods,” “materials,” and “processes,” and it is necessary to use the optimal method and materials depending on the construction location and existing substrate.
For example, even with the same urethane waterproofing, there are different types of processes such as “adhesion method” and “ventilation buffer method,” and there are various types of urethane waterproofing materials such as “high-strength specification,” “heat-insulating specification,” and “anti-slip specification.” Therefore, it is essential to confirm whether the construction content is appropriate for the construction location!
It is important not to judge solely based on cost, but to carefully check whether “the method is appropriate for the substrate?” and “are the materials appropriate?”
Therefore, if the materials used are only “urethane waterproofing materials,” make sure to check the product name and confirm what kind of materials they are!
If you are looking for a waterproofing contractor in Aota-ku, Tokyo,
please contact Kakeru Koumuten Co., Ltd.
Our company has handled many waterproofing projects in Aota-ku, Tokyo.
Our greatest strength is that we can handle everything from proposals to temporary scaffolding installation and waterproofing work in-house!
Kakeru Koumuten Co., Ltd. promises “high-quality waterproofing work at low cost”, and we have received high praise from many customers.
We continue to update our construction performance numbers every year, and we will strive to improve quality to satisfy even more customers in the future.
We are also happy to handle small partial projects!
In addition to waterproofing work, we can perform all exterior renovations, including roofing work, exterior painting, and exterior cover methods, in-house.
We are confident that we will not be outdone by other companies in terms of cost, quality, and organization for exterior work!
We welcome competitive estimates with confidence!
Estimates are completely free, and if you find that our company is inferior to others, feel free to decline!
For exterior renovations in Aota-ku, Tokyo, click here!
For exterior painting in Aota-ku, Tokyo, click here!
For roofing renovations in Aota-ku, Tokyo, click here!
For leak repairs in Aota-ku, Tokyo, click here!
Features of Adachi-ku, Tokyo
Adachi-ku, Tokyo, is located at the northern edge of the 23 wards of Tokyo, adjacent to Saitama Prefecture. It is characterized by a high level of transportation convenience centered around Kitasenju, while also coexisting with vast natural areas and tranquil residential neighborhoods. In particular, Kitasenju Station is a hub for multiple lines, including the JR Joban Line, Tokyo Metro Hibiya Line, Chiyoda Line, Tobu Skytree Line, and Tsukuba Express, making access to the city center and surrounding areas very convenient.
The area is home to many spots where you can feel nature, such as Toneri Park and green spaces along the Arakawa River, and it is known for having one of the largest park areas among the 23 wards. Additionally, historical landmarks such as Nishiarai Daishi and the remains of the Senju post town are scattered throughout the area, allowing culture and nature to coexist in harmony.
In summer, the “Adachi Fireworks” held on the banks of the Arakawa River is famous, attracting many visitors each year. Redevelopment is also progressing, with large commercial facilities and road improvements underway in the Takenotsuka and Ayase areas, enhancing the livability year by year.
The climate is relatively mild, with winters not significantly different from the city center, providing a comfortable living environment throughout the four seasons. Housing prices and rents tend to be relatively reasonable compared to other areas in the 23 wards of Tokyo, making it popular among a wide range of generations from young people to families.
Our company offers a wide range of waterproofing services in Adachi-ku. We can handle all exterior renovations, including waterproofing, roofing, and exterior painting, in-house.
If you have any concerns, please feel free to consult with us!
Waterproofing Service Areas
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and all of Tokyo.
List of Areas in Adachi-ku, Tokyo
Aoi, Adachi-ku / Adachi, Adachi-ku / Ayase, Adachi-ku / Ikoi, Adachi-ku / Ikoi Honcho, Adachi-ku / Iriya, Adachi-ku / Iriya-machi, Adachi-ku / Umejima, Adachi-ku / Umeda, Adachi-ku / Ogi, Adachi-ku / Otanita, Adachi-ku / Okino, Adachi-ku / Odai, Adachi-ku / Kaga, Adachi-ku / Kapei, Adachi-ku / Kitakapei-machi, Adachi-ku / Kurihara, Adachi-ku / Koudou, Adachi-ku / Kohoku, Adachi-ku / Furuchitani, Adachi-ku / Furuchitani Honcho, Adachi-ku / Sano, Adachi-ku / Saranuma, Adachi-ku / Kahama, Adachi-ku / Shimane, Adachi-ku / Nitta, Adachi-ku / Shinmei, Adachi-ku / Shinmei Minami, Adachi-ku / Sekihara, Adachi-ku / Senju, Adachi-ku / Senju Akebono-cho, Adachi-ku / Senju Asahi-cho, Adachi-ku / Senju Higashi, Adachi-ku / Senju Okawamachi, Adachi-ku / Senju Kawaramachi, Adachi-ku / Senju Kotobuki-cho, Adachi-ku / Senju Sakuragi, Adachi-ku / Senju Sekiya-machi, Adachi-ku / Senju Tatsuta-machi, Adachi-ku / Senju Nakai-machi, Adachi-ku / Senju Nakacho, Adachi-ku / Senju Hashido-machi, Adachi-ku / Senju Midori-cho, Adachi-ku / Senju Miyamoto-cho, Adachi-ku / Senju Motomachi, Adachi-ku / Senju Yanagicho, Adachi-ku / Takenotsuka, Adachi-ku / Tatsunuma, Adachi-ku / Chuo Honcho, Adachi-ku / Tsubaki, Adachi-ku / Higashi Ayase, Adachi-ku / Higashi Ikoi, Adachi-ku / Higashi Hobikuma, Adachi-ku / Higashi Rokugatsu-cho, Adachi-ku / Hitotsuya, Adachi-ku / Hinode-cho, Adachi-ku / Hirano, Adachi-ku / Hobikuma, Adachi-ku / Hozuka-cho, Adachi-ku / Horinouchi, Adachi-ku / Minami Hanabatake, Adachi-ku / Miyagi, Adachi-ku / Rokugi, Adachi-ku / Motoki, Adachi-ku / Motoki Higashi-machi, Adachi-ku / Motoki Nishi-machi, Adachi-ku / Motoki Minami-machi, Adachi-ku / Motoki Kita-machi, Adachi-ku / Tanzaika, Adachi-ku / Yanaka, Adachi-ku / Yanagihara, Adachi-ku / Rokugatsu, Adachi-ku / Rokumachi, Adachi-ku
Consultations via LINE are also very welcome◎
株式会社翔工務店へ
株式会社翔工務店は平均年齢20代後半の若い会社ですが、技術はどこにも負けていません。
いちばんの強みは、足場工事、屋根工事、塗装工事とすべて自社で行えること。一般には分業されるこの業界にあって、一式で頼めるので管理に手間がかからず、コストも抑えることが出来ます。何より、トラブルがあればすぐにかけつけます!
自信をもって、宣言できます。私たちは、神奈川で一番若くて親切なリフォーム屋です!





