If you are looking for a waterproofing contractor in Musashimurayama City, Tokyo,
come to Kakeru Koumuten
Kakeru Koumuten specializes in exterior renovations.
We receive many requests for waterproofing work in Musashimurayama City, Tokyo, ranging from single-family homes to apartment buildings.
“Reasons why Kakeru Koumuten is chosen in Musashimurayama City, Tokyo”
“About the costs of waterproofing work”
“How to choose a waterproofing contractor”
“Subsidies and grants applicable to waterproofing work in Musashimurayama City, Tokyo”
We will explain the above four points!
This will definitely be helpful for customers considering waterproofing work in Musashimurayama City, Tokyo, so
please take a look!
目次
- 1 Reasons why Kakeru Koumuten is chosen for waterproofing work in Musashimurayama City, Tokyo
- 2 Subsidies and Grants for Waterproofing Work in Musashimurayama City, Tokyo
- 3 About the Costs of Waterproofing Work
- 4 Customer Testimonials
- 5 Examples of Waterproofing Construction
- 6 Timing for Waterproofing Work
- 7 Types of Waterproofing Work
- 8 How to Choose a Waterproofing Contractor
- 8.1 Check if they have extensive experience in waterproofing work
- 8.2 Check if there is aftercare maintenance and construction warranty
- 8.3 Obtain estimates from multiple contractors for waterproofing work (at least three companies)
- 8.4 Check if they perform waterproofing work in-house
- 8.5 Carefully Check the Details of Waterproofing Estimates, Processes, and Materials
- 9 If you are looking for waterproofing contractors in Musashimurayama City, Tokyo, please contact Kakeru Koumuten Co., Ltd.
- 10 Features of Musashimurayama City, Tokyo
Reasons why Kakeru Koumuten is chosen for waterproofing work in Musashimurayama City, Tokyo
Regarding the reasons why our company is entrusted with waterproofing work by customers in Musashimurayama City, Tokyo,
“Our strengths in waterproofing work that cannot be imitated by other companies”
have received high praise from many customers.
In waterproofing work in Musashimurayama City, Tokyo,
we have absolute confidence in “costs,” “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．Specialized equipment for exterior renovations
At Kakeru Koumuten Co., Ltd., we have organized the following warehouses and material storage areas to provide more affordable and faster exterior renovations such as waterproofing work.
We have established five bases centered around Aoba-ku, Yokohama for material storage and showrooms.
In-house Ownership of 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 cut costs associated with scaffolding work.
Since everything is done in-house, we can significantly reduce costs by shortening the construction period!
We have approximately enough scaffolding materials for 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 canprocure materials at a lower cost!
Additionally, we always have waterproofing components in stock, allowing us torespond quickly to emergency waterproofing work!
In-house waste separation
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 on 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 structure and color tones.
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
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 full 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 rooftop for waterproofing checks, we will utilize drones to assess the condition.
We can also conduct investigations using thermal imaging cameras during leak investigations.
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, so our company maintains a system where the representative remains the same.
6. Human Resource Development
To enhance our skills, we create various building models 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 Musashimurayama City, Tokyo
If damage due to natural disasters is recognized, it may be covered by fire insurance.
Considerations for waterproofing damage due to natural disasters may include “holes in waterproof sheets caused by flying objects or falling debris due to wind damage.”
If you are unsure whether you are eligible for fire insurance, please feel free to contact us!
About the Property Tax Reduction System for Condominiums that Undergo Large-Scale Renovation Work Contributing to Longevity
This is a system that reduces the property tax for the year following the completion of large-scale renovation work that contributes to the longevity of the condominium. (Urban planning tax is not reduced)
This property tax reduction system was initially applicable to condominiums where the work was completed between April 1, 2023, and March 31, 2025, but due to the local tax reform in fiscal year 2025, the period has been extended to include condominiums where the work is completed by March 31, 2027.
About the Costs of Waterproofing Work
⇧Service Menu｜For information on waterproofing construction costs, click here
Customer Testimonials
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Examples of Waterproofing Construction
| 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: Made of 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 rooftop, and we are worried about leaks. ・We would like an estimate for a complete waterproof 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, the air rising from the building is controlled by the ventilation sheet and expelled through the “ventilation pipe.”
This method can prevent the most common issue in waterproofing, which is bulging of the waterproof layer!
After explaining the materials and methods, you entrusted the project to us among the four estimates you received!
Timing for Waterproofing Work
Leaks Have Already Occurred
If leaks have already occurred, it is necessary to address the issue promptly before the damage spreads.
If left unattended, it can negatively impact the interior and underlying structures, so it is essential to stop the leaks quickly.
Bulging or Cracking of the Waterproof Layer
If the waterproof section 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 accumulated 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 can vary depending on the construction method and materials, but for some types of waterproofing, it is recommended to apply a 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.
One of the advantages is that it can be applied to complex shapes since it is liquid before curing, and unlike sheet waterproofing, it can be installed without seams.
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 often 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.
For more detailed information 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 “slip-resistant vinyl floor sheet,” is commonly applied in shared areas of apartments and staircases 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 the rooftops of apartments where people do not frequently enter.
For more detailed information 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 applied 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 detailed information on the advantages and disadvantages of FRP waterproofing and maintenance methods, please refer to 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 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 information on asphalt waterproofing!
How to Choose a Waterproofing Contractor
There are many waterproofing contractors available in Musashimurayama City, Tokyo.
Among the numerous contractors, there are likely many who feel, “I don’t know who to ask for help…”
Choosing the right contractor at first can be challenging, so I will explain 5 points to consider when requesting waterproofing work.
● Have extensive experience in waterproofing work
● Confirm the availability of aftercare and warranties
● Obtain estimates from multiple contractors (at least 3 companies)
● Check if they perform waterproofing work in-house
● Carefully review 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.
Check if 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 experience!
You need to refer to the contractor’s website for their construction achievements 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!
A particularly recommended review site 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 warranties are usually confident in their work, making them more trustworthy!
If waterproofing work is done, make sure to take photos of hidden areas during the process for verification!
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!
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 early 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 you wish, annual aftercare maintenance can be arranged!
Obtain estimates from multiple contractors for waterproofing work (at least three companies)
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 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, be sure to check not only the costs but also the details such as “types of materials used” and “construction methods”!
Check if they perform waterproofing work in-house
Confirm whether they carry out waterproofing work in-house!
If a sales company investigates and then requests a subcontractor, it will incur additional time and costs.
Also, there may be cases where customer requests are not 100% communicated to the subcontractor, leading to troubles.
By having one company handle everything from sales to construction, responsible waterproofing work can be done quickly and cost-effectively. Kakeru Koumuten conducts everything from on-site surveys to actual construction in-house!
Furthermore, in the event of leaks or troubles, a company that has 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 like “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,” so it is essential to confirm whether the construction content is appropriate for the 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?”
Therefore, 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 waterproofing contractors in Musashimurayama City, Tokyo, please contact Kakeru Koumuten Co., Ltd.
Our company has handled many waterproofing projects in Musashimurayama City, Tokyo.
Our greatest strength is that we can handle 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 high praise from many customers.
We continue to update our construction performance every year, and we will strive to improve quality to satisfy even more customers in the future.
We are happy to accommodate even small partial projects!
In addition to waterproofing work, we can handle roofing work, exterior painting, and exterior cover methods, all in-house.
We are confident that we will not be outdone in terms of cost, quality, and organization compared to other companies for exterior work!
We are confident, so we welcome competitive estimates!
Estimates are completely free, and if our company is inferior to others, you are welcome to decline!
For exterior renovations in Musashimurayama City, Tokyo, click here!
For exterior painting in Musashimurayama City, Tokyo, click here!
For roofing renovations in Musashimurayama City, Tokyo, click here!
For leak repairs in Musashimurayama City, Tokyo, click here!
Features of Musashimurayama City, Tokyo
Musashimurayama City is located in the northwestern part of Tokyo and is a city blessed with a rich natural environment in the Tama region. The city area is spread across the Sayama Hills, and due to its abundance of greenery and waterfronts, it is cherished as a region where one can enjoy a peaceful life.
The climate has inland characteristics, with hot summers and cold winters, but it provides an environment where one can enjoy beautiful nature throughout the four seasons.
For transportation access, the Tama Monorail runs through the city, making it convenient to transfer to the JR Chuo Line and Seibu Haijima Line. It also has good access to Tachikawa Station, making it suitable for commuting and schooling to the city center. Additionally, the city’s road network is well-developed, allowing for comfortable travel by car.
As for tourist spots, there is the “Noyamakita-Rokudoyama Park,” surrounded by rich nature. This park, with its rural landscape, offers opportunities for walking, bird watching, and observing seasonal plants. Furthermore, “Murayama Onsen Katakurino-yu” provides a day-use hot spring experience and is popular as a healing spot for both locals and tourists.
Our company, Kakeru Koumuten Co., Ltd., offers a wide range of waterproofing construction services in Musashimurayama City. We can handle all exterior renovations, including waterproofing, roofing, and exterior wall painting, with our own staff.
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 Musashimurayama City, Tokyo
Inahira, Musashimurayama City / Enoki, Musashimurayama City / Ominami, Musashimurayama City / Gakuen, Musashimurayama City / Kishi, Musashimurayama City / Zambori, Musashimurayama City / Shinmei, Musashimurayama City / Chuo, Musashimurayama City / Nakato, Musashimurayama City / Nakahara, Musashimurayama City / Honcho, Musashimurayama City / Mitsuki, Musashimurayama City / Mitsufuji, Musashimurayama City / Midorigaoka, Musashimurayama City
Consultations via LINE are also very welcome◎
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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!
