If you are looking for a waterproofing contractor in Naka-ku, Yokohama
Please contact Kakeru Koumuten
Kakeru Koumuten is a company specializing in exterior renovations based in Yokohama.
We receive many requests for waterproofing work in Naka-ku, Yokohama, ranging from single-family homes to apartment buildings.
“Reasons why Kakeru Koumuten is chosen in Naka-ku”
“About the costs of waterproofing work”
“How to choose a waterproofing contractor”
“About grants and subsidies applicable to waterproofing work in Naka-ku”
We will explain the above four points!
This will definitely be helpful for customers considering waterproofing work in Naka-ku, Yokohama, so
please take a look!
Reasons why Kakeru Koumuten is chosen for waterproofing work in Naka-ku, Yokohama
Regarding the reasons why our company is entrusted with waterproofing work by customers in Naka-ku, Yokohama,
One reason is that we have a base in Yokohama City, but
“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 be grateful 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 exterior renovations such as waterproofing work.
We have established 5 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 conducting 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 the waste materials, significant cost reductions in waste disposal fees can be achieved.
Exterior Renovation Dedicated Showroom
In our showroom, not only can you have meetings, but you can also
directly check the actual structure 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 work.
Since the same person will handle sales and project 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 permits for construction work and 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
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 on the image above!
In the unlikely event that leaks are not resolved after the waterproofing work, we will take responsibility and respond accordingly!
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 rooftop 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 may cause problems; therefore, we maintain a system where the representative remains the same.
6. Human Resource Development
We create various building models to enhance our skills and conduct practical training.
We regularly provide technical training to ensure that each staff member can handle various types of buildings.
Subsidies and Grants that May Apply for Waterproofing Work in Naka-ku, Yokohama
If damage due to natural disasters is recognized, it may be covered by fire insurance.
For waterproofing, potential damage from natural disasters may 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!
Property Tax Reduction System for Condominiums with Major Repairs (Condominium Longevity Promotion Tax System)
To promote the longevity of condominiums, for those that meet certain requirements, if major repairs contributing to longevity are carried out between April 1, 2023, and March 31, 2027, and the necessary documents are submitted to the Tax Division of the Ward Office within three months of the completion of the work, there is a system that reduces the property tax amount for the following fiscal year by half for that condominium.
Condominium Longevity Promotion Tax System
Yokohama City Official Website
About the Costs of Waterproofing Work
⇧ Construction Menu | Click here for Waterproofing Costs
Customer Feedback
カテゴリ ‘voice’ は見つかりません
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customer reviews
Asao-ku, Kawasaki City | We received reviews about the ridge cap and rain gutter replacement work!
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customer reviews
Kohoku-ku, Yokohama | We received reviews about the roof overlay (cover method)!
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customer reviews
Kohoku-ku, Yokohama | We Received Reviews About Exterior Painting!
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customer reviews
Aoba-ku, Yokohama | We received reviews about our exterior fence construction!
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customer reviews
Tsurumi-ku, Yokohama | We received reviews about roof and exterior wall painting, as well as metalwork and rain gutter replacement work!
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customer reviews
Higashiyamato City, Tokyo | We received reviews about exterior painting and roof overlay (cover method)!
Examples of Waterproofing Work
| Construction Details |
| Urethane Waterproofing Ventilated Cushion 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 Ventilation Pipe: Stainless Steel Replaced with 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 waterproof sheet on the roof, so I am worried about leaks. ・I would like an estimate for a complete waterproof renovation, not just partial repairs or a top coat. ・I learned that urethane waterproofing has high waterproofing properties, so I would like an estimate for urethane waterproofing. ・Since this is my first waterproofing project, I would like to compare estimates. |
Our Proposal
Since you wanted a long-lasting method rather than a protective agent like a top coat, we proposed a complete “urethane waterproofing work” for the roof.
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 applying urethane waterproofing.
By applying the ventilation buffer sheet first, the air rising from the building is suppressed by the ventilation sheet and expelled through the “ventilation pipe.”
This can prevent the most common trouble of bulging in the waterproof layer!
After explaining the materials and methods, you entrusted us with the work among the four estimates!
Timing for Waterproofing Work
Leaks Already Occurring
If leaks have already occurred, it is necessary to address them promptly before the damage spreads.
If left unattended, it can adversely affect the interior and underlying structures, so it is essential to stop the leaks quickly.
Bulges or Cracks in the Waterproof Layer
If the waterproof area is cracked, it can lead to rainwater intrusion.
If the waterproof layer is bulging, it indicates that moisture is accumulating within the layer.
Bulges can lead to cracks, which can result in leaks, so early detection and action are necessary.
Moss or Mold Growth
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.
Exceeding Durability Years
Generally, the durability of 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 essential.
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 where liquid polyurethane resin is applied in layers to the waterproofing surface.
Since it is liquid before curing, it can be applied to complex shapes, and unlike sheet waterproofing, it can be installed without seams, which is a significant advantage.
It can be widely applied to balconies, rooftops, and more.
For more details on the advantages, disadvantages, and maintenance methods of urethane waterproofing, please refer to the article below.
For more on waterproofing work | Urethane waterproofing, click here!
2. Rubber Sheet Waterproofing
Rubber sheet waterproofing involves adhering synthetic rubber sheets to the surface to prevent water intrusion.
This type of waterproofing 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.
For more details on the advantages, disadvantages, and maintenance methods of rubber sheet waterproofing, please refer to the article below.
For more on waterproofing work | Rubber sheet waterproofing, click here!
3. PVC Sheet Waterproofing
PVC sheet waterproofing is a waterproof sheet made of polyvinyl chloride, which, like rubber sheet waterproofing, is adhered to the surface to prevent water intrusion.
Like rubber sheets, it is not suitable for complex shapes. Although it is more expensive than rubber sheets and urethane waterproofing, its long durability is an 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 PVC sheet waterproofing work!
4. Long Sheet Waterproofing
Long sheet waterproofing is officially named “anti-slip vinyl floor sheet” and is commonly used in shared areas and stairs of apartments where people walk.
As the name suggests, it is slip-resistant and has high durability and wear 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 have a slightly lower impression of waterproofing capability.
It is rarely used in areas like rooftops of apartments 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 long sheet waterproofing work!
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 construction on large areas, making it less appropriate for rooftops.
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 refers to 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 secured 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 detailed explanations of 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 Naka-ku, Yokohama.
Among the numerous contractors, there are likely many who feel, “I don’t know who to ask for help…”
Choosing a contractor for the first time can be challenging, so I will explain 5 points to keep in mind when requesting waterproofing work.
● Have extensive experience in waterproofing work
● Confirm the presence of aftercare and warranty
● Obtain multiple estimates for waterproofing work (at least 3 companies)
● Check if they perform waterproofing work in-house
● Carefully review the contents of the waterproofing estimate, process, and materials used
By confirming the above 5 points, you will be able to choose a reliable contractor.
Check if they have extensive experience in waterproofing work
About 10-20% of waterproofing construction troubles are caused by poor workmanship during the construction process.
To prevent troubles, it is important to hire a reliable contractor with experience!
You need to refer to the contractor’s website for their construction achievements and reviews to make a judgment.
There are also contractors who showcase their achievements on social media platforms like Instagram, so checking those can be effective!
It is also effective to look at waterproofing construction companies using review sites for reference!
A particularly recommended review site is “Google”.
Since contractors cannot delete low ratings on their own, 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 of any construction defects or issues after the work is done, let’s confirm if they provide a “Construction Warranty”!
Contractors who offer warranties are usually confident in their work, making them more trustworthy!
If waterproofing work is done, make sure to take photos of the hidden areas during the process for confirmation!
Check for leaks during rainy weather after the waterproofing work, and if there are any issues, contact the contractor immediately as it will facilitate smooth communication shortly after the work is completed!
Also, to ensure early detection of any issues that may arise, confirm if they conduct thorough aftercare maintenance!
Since non-specialized contractors may not notice signs of problems or troubles, having a specialized contractor perform regular aftercare maintenance can help prevent issues before they occur!
Our company sends out aftercare maintenance DM every year, so if desired, annual aftercare maintenance is possible!
Obtain estimates from multiple contractors (at least 3)
When requesting waterproofing work, be sure to obtain estimates from multiple contractors.
We recommend obtaining estimates from at least 3 companies.
Even for the same waterproofing work, costs may vary between contractors, and warranties and after-service may differ as well.
Additionally, 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, be sure to check not only the costs but also the “types of materials used” and “construction methods” for detailed comparisons!
Check if they perform waterproofing work in-house
Confirm whether they perform waterproofing work in-house!
If a sales company investigates and then requests a subcontractor, it will take more time and cost.
Moreover, there may be cases where your requests are not fully communicated to the subcontractor, leading to troubles.
By having one company handle everything from sales to construction, responsible waterproofing work can be carried out quickly and cost-effectively. Kakeru Koumuten handles everything from on-site surveys to actual construction in-house!
Additionally, if leaks or troubles occur, a company that employs its own craftsmen can respond to and resolve issues quickly!
Carefully Check the Details of Waterproofing Estimates, Processes, and Materials
Even for the same waterproofing work, there are various types such as “methods,” “materials,” and “processes,” and it is necessary to carry out the work using the most suitable method and materials depending on the construction site and existing substrate.
For example, even with the same urethane waterproofing, there are different types of processes such as “adhesion method” and “ventilated buffer method,” and there are various types of urethane waterproofing materials such as “high-strength specifications,” “heat-insulating specifications,” and “anti-slip specifications.” Therefore, it is essential to confirm whether the construction content is appropriate for the installation 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 suitable?”
So, if the materials used are only “urethane waterproofing materials,” let’s confirm the product name and check what kind of materials they are!
If you are looking for a waterproofing contractor in Naka-ku, Yokohama, please contact Kakeru Koumuten Co., Ltd.
Our company has handled many waterproofing projects in Naka-ku, Yokohama.
Our greatest strength is that we can carry out everything from proposals to the installation of temporary scaffolding and waterproofing work in-house!
Kakeru Koumuten Co., Ltd. promises “high-quality waterproofing work at low cost”, and we have received great praise from many customers.
We continue to update our construction performance every year, and we will strive to improve quality so that we can satisfy even more customers in the future.
We are happy to handle even small partial works!
In addition to waterproofing work, we can also carry out roofing work, exterior painting, and exterior cover methods, all in-house.
We are confident that we will not be outdone by other companies in terms of cost, quality, and efficiency in exterior construction!
We welcome competitive estimates with confidence!
Estimates are completely free, and if our company is found to be inferior to others, please feel free to decline!
For exterior renovations in Naka-ku, Yokohama, click here!
For exterior painting in Naka-ku, Yokohama, click here!
For roofing renovations in Naka-ku, Yokohama, click here!
For exterior cover work in Naka-ku, Yokohama, click here!
For leak repairs in Naka-ku, Yokohama, click here!
Characteristics of Naka-ku, Yokohama
Naka-ku, Yokohama is located in the southeastern part of Yokohama City, facing Tokyo Bay, with hilly terrain spreading to the west. The population is about 150,000, and it has excellent characteristics as a residential environment, where the convenience of commercial areas and quiet residential neighborhoods coexist harmoniously.
In addition, the coastal area centered around Yokohama Port is developing as a tourist and commercial area, while the inland area is spread with residential neighborhoods. The region has a long and narrow shape, with the northern side concentrated on Yokohama’s central business and tourism areas, while the southern side is rich in residences and nature.
If you live in Naka-ku and have any concerns regarding waterproofing work or your home, please feel free to contact us!
Waterproofing Work Service Area
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo.
List of Areas in Naka-ku, Yokohama
Aioicho, Naka-ku / Akamoncho, Naka-ku / Akebonocho, Naka-ku / Ikebukuro, Naka-ku / Ishikawacho, Naka-ku / Isezaki-cho, Naka-ku / Uenomachi, Naka-ku / Uchikoshi, Naka-ku / Uchida-cho, Naka-ku / Ogi-cho, Naka-ku / Ooshibadai, Naka-ku / Ootamachi, Naka-ku / Oohiracho, Naka-ku / Okina-cho, Naka-ku / Oonoe-cho, Naka-ku / Kaigandori, Naka-ku / Kashiwaba, Naka-ku / Kamome-cho, Naka-ku / Kitakata-cho, Naka-ku / Kitanakadori, Naka-ku / Koganecho, Naka-ku / Kotobukicho, Naka-ku / Komagane-cho, Naka-ku / Sagi-yama, Naka-ku / Sakuragicho, Naka-ku / Shinminato, Naka-ku / Shinyamashita, Naka-ku / Suehirocho, Naka-ku / Sueyoshicho, Naka-ku / Sumiyoshi-cho, Naka-ku / Suwa-cho, Naka-ku / Takinoue, Naka-ku / Takenomaru, Naka-ku / Tachino, Naka-ku / Chitose-cho, Naka-ku / Chidoricho, Naka-ku / Chojamachi, Naka-ku / Chiyozakicho, Naka-ku / Tsukagoshi, Naka-ku / Terakubo, Naka-ku / Tokiwacho, Naka-ku / Toyoura-cho, Naka-ku / Nakao-dai, Naka-ku / Nishikicho, Naka-ku / Nishitakenomaru, Naka-ku / Nishinoyanacho, Naka-ku / Nihon Odori, Naka-ku / Negishi Asahi-dai, Naka-ku / Negishi Kasodai, Naka-ku / Negishi-dai, Naka-ku / Negishi-cho, Naka-ku / Nogecho, Naka-ku / Hagoromo-cho, Naka-ku / Hatsune-cho, Naka-ku / Hanasakicho, Naka-ku / Eitamachi, Naka-ku / Bandai-cho, Naka-ku / Hinode-cho, Naka-ku / Fukutomi-cho Nakadori, Naka-ku / Fukutomi-cho Nishidori, Naka-ku / Fukutomi-cho Higashidori, Naka-ku / Fujimimachi, Naka-ku / Furou-cho, Naka-ku / Benten-dori, Naka-ku / Hourai-cho, Naka-ku / Hongogacho, Naka-ku / Honmachi, Naka-ku / Honmoku Arai, Naka-ku / Honmoku Osato-cho, Naka-ku / Honmoku Sannotani, Naka-ku / Honmoku Juuniten, Naka-ku / Honmoku-cho, Naka-ku / Honmoku Hara, Naka-ku / Honmoku Futou, Naka-ku / Honmoku Kamikado, Naka-ku / Honmoku Manzaka, Naka-ku / Honmoku Midorigaoka, Naka-ku / Honmoku Miyahara, Naka-ku / Honmoku Motomachi, Naka-ku / Honmoku Wada, Naka-ku / Masago-cho, Naka-ku / Matsukage-cho, Naka-ku / Mameguchi-dai, Naka-ku / Minato-cho, Naka-ku / Minami Nakadori, Naka-ku / Minami Honmoku, Naka-ku / Minosawa, Naka-ku / Miyakawacho, Naka-ku / Myokoji-dai, Naka-ku / Mikiyoshi-cho, Naka-ku / Mugitacho, Naka-ku / Motohamacho, Naka-ku / Motomachi, Naka-ku / Yaguchidai, Naka-ku / Yamashitacho, Naka-ku / Yamada-cho, Naka-ku / Yamate-cho, Naka-ku / Yamato-cho, Naka-ku / Yamabuki-cho, Naka-ku / Yamamoto-cho, Naka-ku / Yayoicho, Naka-ku / Yokohama Park, Naka-ku / Yoshidacho, Naka-ku / Yoshihamacho, Naka-ku / Wakabacho, Naka-ku / Wadayama, Naka-ku
Consultations via LINE are also very welcome◎
We are also updating our Instagram regularly◎ Please follow us!◎
AAA is a young company with an average age in the early 20s, but our technology is second to none.
One of our greatest strengths is that we can do all of our own scaffolding, roofing, and painting work. In this industry, where work is generally divided, we are able to provide a complete set of services, which saves time and effort in management and reduces costs. Above all, if there is any trouble, we will come to you right away!
We can confidently declare this. We are the youngest and most friendly renovator in Kanagawa!
