Leave Your Waterproofing Work in Mitaka City, Tokyo to Kakeru Koumuten Co., Ltd.!
If you are looking for a waterproofing contractor in Mitaka City, Tokyo,
come to Kakeru Koumuten
Kakeru Koumuten is a company specializing in exterior renovations.
We receive many requests for waterproofing work from single-family homes to apartment buildings in Mitaka City, Tokyo.
“Reasons why Kakeru Koumuten is chosen in Mitaka City, Tokyo”
“About the costs of waterproofing work”
“How to choose a waterproofing contractor”
“Subsidies and grants available for waterproofing work in Mitaka City, Tokyo”
We will explain the above four points!
This will definitely be helpful for customers considering waterproofing work in Mitaka City, Tokyo, so
please take a look!
Reasons why Kakeru Koumuten is chosen for waterproofing work in Mitaka City, Tokyo
Regarding the reasons why customers in Mitaka City, Tokyo, trust us with their waterproofing work,
“Our strengths in waterproofing work that cannot be imitated by other companies”
have received high praise from many customers.
In waterproofing work in Mitaka City, Tokyo,
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．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 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 on scaffolding work.
Since everything is done in-house, we can significantly reduce costs through shortened construction periods!
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 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 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., 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 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 national 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 once a 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 due to height, 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 could cause problems, so we maintain a system where the representative remains the same.
6. Human Resource Development
To improve our skills, we create various building models and conduct practical training.
We regularly provide technical training so that each staff member can handle various types of buildings.
Subsidies and Grants That May Apply to Waterproofing Work in Mitaka City, Tokyo
If damage from natural disasters is recognized, it may be covered by fire insurance.
In terms of waterproofing, potential damage from natural disasters could include “holes in waterproof sheets caused by flying objects or falling debris due to wind disasters.”
If you are unsure whether your fire insurance applies, please feel free to contact us!
Property Tax Reduction System for Condominiums That Have Undergone Major Repairs
From April 1, 2023, to March 31, 2027, if major repairs that contribute to longevity are carried out in a condominium that meets certain requirements, the property tax for the following fiscal year after the completion of the work will be reduced (urban planning tax will not be reduced).
Property Tax Reduction System for Condominiums That Have Undergone Major Repairs
About the Costs of Waterproofing Work
⇧ Construction Menu | For Information on Waterproofing Costs, Click Here
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)!
Waterproofing Work Case Studies
| 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 rooftop, so 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, so we 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 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 installing the 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 tube.”
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
Leaks are already occurring
If leaks have already occurred, it is necessary to address the issue 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 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 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 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 that involves applying liquid polyurethane resin onto 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.
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 on 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, and like rubber sheet waterproofing, it 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 about 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 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 give a slightly lower impression of waterproofing capability.
It is rarely used in areas like rooftops of apartments where people do not frequently enter and exit.
For more detailed information about 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 hardening glass mat with epoxy resin to prevent rainwater intrusion.
It is commonly used in single-family home balconies, and the construction period is overwhelmingly short, often completed in as little as one day.
Due to its lightweight and low cost, it seems that about 80% of single-family home balconies use FRP waterproofing.
However, it is not suitable for installation on large areas, making it less ideal for rooftop applications.
For more detailed information about 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 large buildings such as rooftops of schools and commercial facilities.
While there are various methods of asphalt waterproofing, each with its own advantages and disadvantages, a significant benefit is its high durability.
For more detailed information 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 Mitaka City, 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 consider when requesting waterproofing work.
● Have extensive experience in waterproofing work
● Confirm the existence of aftercare and warranty
● Obtain estimates from multiple contractors (at least 3 companies)
● Check if the contractor performs waterproofing work in-house
● Carefully review the contents of the waterproofing estimate, the process, and the 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 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 any construction defects or issues occur after the work, let’s confirm whether they provide a “construction warranty”!
Contractors who offer warranties are usually confident in their work, making them trustworthy companies!
If waterproofing work is done, make sure to take photos of the 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!
Also, to detect any issues early, confirm whether they will conduct thorough aftercare maintenance!
If a non-specialized contractor handles issues and troubles, they may not notice early signs, so having a specialized contractor perform regular aftercare maintenance can prevent troubles before they occur!
Our company sends out aftercare maintenance DM every year, so if you wish, annual aftercare maintenance is possible!
Obtain estimates from multiple contractors for waterproofing work (at least 3 companies)
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-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 obtain estimates from several contractors.
When comparing estimates, 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 perform waterproofing work in-house!
If a sales company investigates and then requests a subcontractor, it will take extra time and costs.
Moreover, there may be cases where your requests are not communicated 100% 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 handles everything from on-site surveys to actual construction in-house!
Furthermore, in the event of a leak or trouble, if the company has its own craftsmen, they 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 location 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, including “high-strength specifications,” “heat-insulating specifications,” and “anti-slip specifications.” Therefore, 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?”
Thus, 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 Mitaka City, Tokyo, please contact Kakeru Koumuten Co., Ltd.
Our company has handled many waterproofing projects in Mitaka City, Tokyo.
Our greatest strength is that we can carry out everything from proposals to temporary scaffolding installation and waterproofing work in-house!
Kakeru Koumuten promises “high-quality waterproofing work at low cost”, and we have received positive feedback 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 also happy to handle small partial works!
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, feel free to decline!
For exterior renovations in Mitaka City, Tokyo, click here!
For exterior painting in Mitaka City, Tokyo, click here!
For roofing renovations in Mitaka City, Tokyo, click here!
For leak repairs in Mitaka City, Tokyo, click here!
Characteristics of Mitaka City, Tokyo
Mitaka City is located in the western part of central Tokyo and is a green and tranquil city that retains the charm of Musashino. The city is known for its quiet residential areas and its cultural and sophisticated atmosphere.
The climate is mild and comfortable, characterized by a gentle climate throughout the four seasons. Inokashira Park, where cherry blossoms can be enjoyed in spring and autumn leaves in fall, is beloved by the citizens.
Transportation access is very convenient, with the JR Chuo Line, Sobu Line, and Keio Inokashira Line available. It takes about 15 minutes from Mitaka Station to Shinjuku and less than 30 minutes to Tokyo Station, making it a very convenient location for commuting and schooling.
As a tourist spot, the “Ghibli Museum, Mitaka” is famous, attracting many visitors from both Japan and abroad. Additionally, “Inokashira Park” is popular as a nature-rich walking area, offering various ways to enjoy the park, including a zoo, a pond, and walking paths. The city also has spots related to the literary figure Osamu Dazai, allowing visitors to appreciate its history and culture.
Mitaka City is located in the western part of central Tokyo and is a green, tranquil town that retains the charm of Musashino. The city features quiet residential areas and is known for its cultural and sophisticated atmosphere.
The climate is mild and comfortable, characterized by gentle weather throughout the four seasons. In spring, cherry blossoms can be enjoyed, while in autumn, the colorful foliage of Inokashira Park is beloved by the locals.
Transportation access is very convenient, with the JR Chuo Line, Sobu Line, and Keio Inokashira Line available. It takes about 15 minutes from Mitaka Station to Shinjuku and less than 30 minutes to Tokyo Station, making it a very convenient location for commuting and schooling.
As a tourist spot, the “Ghibli Museum, Mitaka” is famous, attracting many visitors from both Japan and abroad. Additionally, “Inokashira Park” is popular as a nature-rich walking area, offering various ways to enjoy the park, including a zoo, a pond, and walking paths. The city also has spots related to the literary figure Osamu Dazai, allowing visitors to appreciate its history and culture.
Our company offers a wide range of waterproofing services in Mitaka City. We can handle all exterior renovations, including waterproofing, roofing, and exterior painting, with our own skilled team.
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.
Mitaka City, Tokyo Area List
Mitaka City Iguchi / Mitaka City Inokashira / Mitaka City Osawa / Mitaka City Kamirenjaku / Mitaka City Kitano / Mitaka City Shimorenjaku / Mitaka City Shinkawa / Mitaka City Fudaiji / Mitaka City Nakahara / Mitaka City Nozaki / Mitaka City Mure
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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！
