If you are looking for a waterproofing contractor in Itabashi-ku, Tokyo,
please contact Kakeru Koumuten.
Kakeru Koumuten is a company specializing in exterior renovations.
We receive many requests for waterproofing work for both single-family homes and apartment buildings in Itabashi-ku, Tokyo.
“Reasons Why Kakeru Koumuten is Chosen in Itabashi-ku”
“About the Costs of Waterproofing Work”
“How to Choose a Waterproofing Contractor”
“Subsidies and Grants Available for Waterproofing Work in Itabashi-ku”
We will explain the above four points!
This will definitely be helpful for customers considering waterproofing work in Itabashi-ku, so
please take a look!
Reasons Why Kakeru Koumuten is Chosen for Waterproofing Work in Itabashi-ku, Tokyo
Regarding why our company is entrusted with waterproofing work by customers in Itabashi-ku, Tokyo,
“Our Unique 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 waterproofing and other exterior renovations.
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 procure 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 available.
2．Complete In-House Construction
One of Kakeru Koumuten’s major strengths is our complete in-house construction.
From inquiry to project completion, everything is handled by Kakeru Koumuten Co., Ltd., allowing 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 construction industry permits and permits for industrial waste collection and transportation!
We also have qualified professionals on staff, and we are confident in our construction techniques.
We are capable of handling large-scale waterproofing projects such as 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 address the issue!
Additionally, aftercare maintenance is available annually, 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 for 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 issues, so we maintain a system where the representative remains the same.
6. Human Resource Development
To enhance our skills, we create models of various buildings and conduct practical training.
We regularly provide technical training to ensure that all staff can handle various types of buildings.
Subsidies and Grants for Waterproofing Work in Itabashi-ku, Tokyo
Tax Reduction for Promoting the Longevity of Condominiums (Property Tax Reduction)
Requirements for Tax Reduction for Promoting the 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 subsequent work between April 1, 2023, and March 31, 2027
Condominiums with a management plan certification or those that have developed or reviewed long-term repair plans with advice and guidance from local authorities
The residential floor area of the exclusive portion 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
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.
Considerations for waterproofing related to natural disaster damage include “holes in waterproof sheets caused by flying objects or falling debris due to wind disasters.”
If you are unsure whether it is covered by fire insurance, please feel free to contact us!
About the Costs of Waterproofing Work
⇧ For our construction menu | Click here for information on waterproofing costs
Customer Testimonials
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 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 Renovation Drain |
| Price Range |
| 700,000 to 800,000 yen |
| Construction Period |
| Approximately 2 weeks |
| Completion Month |
| May 2024 |
| Inquiry Details |
| We received the following inquiries from our customer: ・There are wrinkles and bulges in the waterproof sheet on the rooftop, so we are worried about leaks. ・Please provide 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 expressed a desire to renovate using a long-lasting method rather than protective agents like top coats, we proposed a complete “urethane waterproofing work” for the rooftop.
If urethane waterproofing is applied using a direct 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 with waterproofing: bulging of the waterproof layer!
After explaining the materials and methods, you entrusted the work to us among the four estimates!
Timing for Waterproofing Work
Leaks Already Occurring
If leaks are already occurring, 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 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.
Bulging 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 the accumulation of moisture or rainwater.
This can be caused by poor drainage or sinking of the waterproof layer due to aging.
Exceeding the Durability Period
Generally, the durability period for waterproofing work is 10 to 20 years.
Of course, the durability period 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 conducting 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 and rooftops.
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 applied to the surface to prevent water intrusion.
Like 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.
We provide detailed explanations about the advantages and disadvantages of PVC sheet waterproofing, as well as maintenance methods, in 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 applied in shared areas and stairs 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 rooftops of apartments where people do not frequently enter.
We provide detailed explanations about the advantages and disadvantages of long sheet waterproofing, as well as maintenance methods, in 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 applied to residential balconies, with an overwhelmingly short construction period, often completed in as little as one day.
Due to its lightweight and low cost, it seems that about 80% of residential balconies use FRP waterproofing.
However, it is not suitable for construction on large areas, making it less appropriate for rooftops.
We provide detailed explanations about the advantages and disadvantages of FRP waterproofing, as well as maintenance methods, in the article below.
Waterproofing Work | Click here for information on 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 major benefit is its high durability.
For detailed explanations on the advantages and disadvantages of asphalt waterproofing and maintenance methods, please refer to the article below.
Waterproofing Work | Click here for information on asphalt waterproofing!
How to Choose a Waterproofing Contractor
There are many waterproofing contractors available in Itabashi-ku, Tokyo.
Among the numerous contractors, I believe there are many people 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 be careful about when requesting waterproofing work.
● Have extensive experience in waterproofing work
● Check for aftercare and warranty availability
● Obtain multiple estimates for waterproofing work (at least 3 companies)
● Confirm whether the company performs 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 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 companies on review sites for reference!
The review site we particularly recommend 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 any construction defects or issues occur 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 companies!
If waterproofing work is done, make sure to have photos taken of hidden areas during the process for confirmation!
Check for leaks during rainy weather after the waterproofing work, and if anything arises, contact the contractor immediately as the communication will be smoother shortly after the work is completed!
Also, to detect any issues early, 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 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, be sure to 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 or after-services may differ as well.
Additionally, obtaining multiple estimates makes it easier to negotiate prices. To request at the lowest possible cost, it is essential to get estimates from several contractors.
When comparing estimates, check not only the costs but also the “types of materials used” and “construction methods” to compare the finer details!
Check if they perform waterproofing work in-house
Let’s confirm whether we carry out 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 fully communicated to the subcontractor, which can lead to troubles.
By handling everything from sales to construction with one company, 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 of a leak or trouble, 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 most suitable method and materials based on the construction site and existing substrate.
For example, even with the same urethane waterproofing, there are different types of processes like “adhesion method” and “ventilation buffer method,” and there are various types of urethane waterproofing materials such as “high strength specification,” “heat insulation specification,” and “anti-slip specification.” Therefore, it is essential to confirm whether the construction content is appropriate for the location!
It is important not to judge solely by 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,” make sure to check the product name and confirm what kind of materials they are!
If you are looking for a waterproofing contractor in Itabashi-ku, Tokyo,
please contact Kakeru Koumuten Co., Ltd.
Our company has handled many waterproofing projects in Itabashi-ku, Tokyo.
Our greatest strength is our ability to carry out 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 great feedback from many customers.
We continue to update our annual construction performance records, 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 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 organization for exterior work!
We welcome competitive estimates with confidence!
Estimates are completely free, and if our company is found to be inferior to others, you are welcome to decline!
Click here for exterior renovations in Aoba-ku, Yokohama!
Click here for exterior wall painting in Aoba-ku, Yokohama!
Click here for roof renovations in Aoba-ku, Yokohama!
Click here for leak repairs in Aoba-ku, Yokohama!
Features of Aoba-ku, Yokohama
Aoba-ku, Yokohama is located in the northwestern part of the 23 wards of Tokyo, where a rich natural environment harmonizes with urban functions. The area features the Musashino Plateau and the Arakawa Lowland, with rivers such as the Shakujii River and the Arakawa flowing through it. Notably, the cherry blossom trees along the Shakujii River, Akatsuka Park, and Johoku Central Park are cherished green spaces for the residents.
Historically, it thrived as a post town on the Nakasendo Road, and remnants of its historical landscape can still be seen today, such as the Shimura Ichiri-zuka and the shopping streets along the old Nakasendo. Additionally, there are about 100 shopping streets in the area, supporting the local vibrancy.
In terms of transportation, the JR Saikyo Line, Tobu Tojo Line, Toei Mita Line, and Tokyo Metro Yurakucho Line provide excellent access to the city center. For example, it takes as little as 5 minutes from Oyama Station on the Tobu Tojo Line to Ikebukuro Station, and just 18 minutes from Itabashi Ward Office Station on the Toei Mita Line to Otemachi Station. Furthermore, there is a well-developed bus network, including the Kokusai Kogyo Bus, connecting major stations and facilities. The number of share bicycle ports is also increasing, making short-distance travel even more convenient.
Our company offers a wide range of waterproofing services in Aoba-ku. We can handle all exterior renovations, including waterproofing, roofing, and exterior wall painting, in-house.
If you have any concerns, please feel free to consult us!
Waterproofing Service Areas
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and all of Tokyo.
List of Areas in Aoba-ku, Yokohama
Aioi-cho, Itabashi-ku, Tokyo / Akatsuka, Itabashi-ku, Tokyo / Akatsuka Shinmachi, Itabashi-ku, Tokyo / Azusazawa, Itabashi-ku, Tokyo / Izumicho, Itabashi-ku, Tokyo / Itabashi, Itabashi-ku, Tokyo / Inaridai, Itabashi-ku, Tokyo / Ohara-cho, Itabashi-ku, Tokyo / Otaniguchi, Itabashi-ku, Tokyo / Otaniguchi Kamimachi, Itabashi-ku, Tokyo / Otaniguchi Kitamachi, Itabashi-ku, Tokyo / Oyamakanai-cho, Itabashi-ku, Tokyo / Oyamahigashi-cho, Itabashi-ku, Tokyo / Oyamanishi-cho, Itabashi-ku, Tokyo / Oyamacho, Itabashi-ku, Tokyo / Kaga, Itabashi-ku, Tokyo / Kamitabashi, Itabashi-ku, Tokyo / Kumano-cho, Itabashi-ku, Tokyo / Komogane, Itabashi-ku, Tokyo / Saiwaicho, Itabashi-ku, Tokyo / Sakaeshicho, Itabashi-ku, Tokyo / Sakuragawa, Itabashi-ku, Tokyo / Shimizucho, Itabashi-ku, Tokyo / Shimura, Itabashi-ku, Tokyo / Shinkawaguchi, Itabashi-ku, Tokyo / Daimon, Itabashi-ku, Tokyo / Takashimadaira, Itabashi-ku, Tokyo / Higashishinmachi, Itabashi-ku, Tokyo / Tokiwadai, Itabashi-ku, Tokyo / Tokumaru, Itabashi-ku, Tokyo / Nakaitabashi, Itabashi-ku, Tokyo / Nakajuku, Itabashi-ku, Tokyo / Nakadai, Itabashi-ku, Tokyo / Nakacho, Itabashi-ku, Tokyo / Nakamaru-cho, Itabashi-ku, Tokyo / Narimasu, Itabashi-ku, Tokyo / Nishidai, Itabashi-ku, Tokyo / Hasune-cho, Itabashi-ku, Tokyo / Hasune, Itabashi-ku, Tokyo / Hikawacho, Itabashi-ku, Tokyo / Higashisaka-shita, Itabashi-ku, Tokyo / Higashiyama-cho, Itabashi-ku, Tokyo / Fujimimachi, Itabashi-ku, Tokyo / Futabacho, Itabashi-ku, Tokyo / Funado, Itabashi-ku, Tokyo / Honmachi, Itabashi-ku, Tokyo / Maeno-cho, Itabashi-ku, Tokyo / Misono, Itabashi-ku, Tokyo / Minamimachi, Itabashi-ku, Tokyo / Minami Tokiwadai, Itabashi-ku, Tokyo / Miyamoto-cho, Itabashi-ku, Tokyo / Mukohara, Itabashi-ku, Tokyo / Yamato-cho, Itabashi-ku, Tokyo / Yayoicho, Itabashi-ku, Tokyo / Yotsuba, Itabashi-ku, Tokyo / Wakaki, Itabashi-ku, Tokyo
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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!
