If you are looking for a waterproofing contractor in
Kakeru Koumuten is the place to go
Kakeru Koumuten is a company specializing in exterior renovations based in Kanagawa Prefecture.
We receive many requests for waterproofing work in Aoba-ku, Yokohama, ranging from single-family homes to apartment buildings.
“Reasons why Kakeru Koumuten is chosen in Aoba-ku, Yokohama”
“About the costs of waterproofing work”
“How to choose a waterproofing contractor”
“Subsidies and grants available for waterproofing work in Aoba-ku, Yokohama”
We will explain the above four points!
This will definitely be useful for customers considering waterproofing work in Aoba-ku, Yokohama, so
please take a look!
Reasons why Kakeru Koumuten is chosen for waterproofing work in Aoba-ku, Yokohama
Regarding the reasons why our company is entrusted with waterproofing work by customers in Aoba-ku, Yokohama,
One reason is that we have a base in Kanagawa Prefecture, but
“Our unique strengths in waterproofing work that cannot be imitated by other companies”
have received high praise from many customers.
“Cost,” “Quality,” “Plan” are our absolute strengths, so
we would appreciate it if you could compare our estimates with those of other companies.
Because we are confident, we welcome competitive estimates!
1.Facilities Specialized in Exterior Renovation
Kakeru Koumuten Co., Ltd. has prepared the following warehouses and material storage areas to provide more affordable and faster 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 reduce the costs associated with scaffolding work.
Since everything is handled in-house, we can significantly reduce costs by shortening the construction period!
We have enough scaffolding materials for approximately 50 single-family homes!
Storage of materials in our large in-house warehouse
We store roofing materials and waterproofing components. By ordering a large quantity of materials at once, we can purchase materials at a lower cost! Additionally, we always have waterproofing components in stock, allowing us to respond quickly to emergency waterproofing work!
In-house sorting of waste materials
In waterproofing work, various waste materials are generated. Most contractors dispose of them all together, but by sorting and recycling waste materials, significant cost reductions in waste disposal can be achieved.
Exterior Renovation Dedicated Showroom
In our showroom, not only can you have meetings, but you can also directly check the actual structures and colors 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 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
All waterproofing work comes with a warranty! Depending on the type of waterproofing work, we provide a 5 to 10-year leak warranty. If you have any questions about the warranty, 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 every year, and we will send you a DM notification for aftercare maintenance once a year. During aftercare maintenance, we will check the entire waterproofing and assess the deterioration status.
5. Flexible and Prompt Response
Our company is equipped to handle various troubles and situations.
If you are unable to access the rooftop for waterproofing checks, we can 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 our company has a system in place to maintain the same representative.
6. Human Resource Development
To enhance skills, we create models of various buildings and conduct practical training. We regularly provide skill enhancement education so that each staff member can handle various types of buildings.
Possible Subsidies and Grants for Waterproofing Work in Chuo-ku, Sagamihara Subsidies and Grants
Condominium Longevity Promotion Tax Reduction (Property Tax Reduction)
Requirements for Condominium Longevity Promotion Tax Reduction
Condominiums over 20 years old
Total number of units: 10 or more
Completion of longevity improvement work at least once in the past + completion of the second or subsequent work between April 1, 2023, and March 31, 2027
Condominiums with a management plan certification or those that have developed or reviewed a long-term repair plan with advice and guidance from the local government
The residential floor area of the exclusive part occupies more than 50% of the total
Tax Reduction Details
Eligible: Property tax on the building portion imposed in the year following the completion of the work.
Maximum Reduction: Up to the equivalent of 100㎡ per unit
Tax Reduction Ratio: The tax amount within the above range is reduced by 1/2 (50%)
Others
Considerations for waterproofing damage due to natural disasters 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 Cost of Waterproofing Work
⇧ Service Menu | For information about 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)!
Examples of Waterproofing Work
工事内容
Rooftop urethane waterproofing work (ventilated buffer method)
Ventilation sheet: QV sheet
We received an inquiry from a customer living in Shibuya-ku, Tokyo, stating, “I am concerned about the deterioration of my rooftop, so I am considering waterproofing work. I would like to request an estimate first.”
Our Proposal
This time, since the customer wanted to renovate using a long-lasting method rather than just protective agents like topcoats, we proposed waterproofing work using a ventilated cushioning method with high-strength urethane.
Timing for Waterproofing Work
Already Experiencing Leaks
If leaks have already occurred, it is necessary to address them promptly before the damage expands.
If left unattended, it can adversely affect the interior and the underlying structure, so it is essential to stop the leaks quickly.
Bloating or Cracking of the Waterproof Layer
If the waterproof section is cracked, it can lead to rainwater intrusion.
If the waterproof layer is bloated, it indicates that moisture is accumulating inside the waterproof layer.
Bloating can lead to cracks and subsequently to leaks, so early detection and action are necessary.
Moss or Mold Growth
Moss or mold can occur 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 between 10 to 20 years.
Of course, the durability period can vary depending on the construction method and materials, but for certain types of waterproofing, such as urethane waterproofing or FRP waterproofing, it is recommended to apply surface protective agents (topcoats) approximately every 8 years.
We recommend regular inspections starting from 5 years after construction.
It is important to understand the type of existing waterproofing and perform appropriate maintenance.
If you are unsure about the type of waterproofing, please send us a photo via email or LINE for our assessment!
Types of Waterproofing Work
1. Urethane Waterproofing
Urethane waterproofing is a method of applying liquid polyurethane resin to the waterproofing surface in layers.
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, which is a significant advantage.
It can be widely applied to balconies, rooftops, and more.
For more details on the advantages and disadvantages of urethane waterproofing, as well as maintenance methods, please refer to the article below.
Waterproofing Work | Learn more about Urethane Waterproofing 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 and disadvantages of rubber sheet waterproofing, as well as maintenance methods, please refer to the article below.
Waterproofing Work | Learn more about Rubber Sheet Waterproofing here!
3. PVC Sheet Waterproofing
PVC sheet waterproofing involves using waterproof sheets made of polyvinyl chloride, which, like rubber sheet waterproofing, adheres sheets to the surface to prevent water intrusion.
Similar to rubber sheets, it is not suitable for complex shapes. While it is more expensive than rubber sheets and urethane waterproofing, its durability is a significant advantage.
For more details on the advantages and disadvantages of PVC sheet waterproofing, as well as maintenance methods, please refer to the article below.
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 a waterproofing method commonly applied in areas where people walk, such as shared spaces and staircases in condominiums.
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 sheet waterproofing, it may give a slightly lower impression of waterproofing performance.
It is rarely used in areas like the rooftops of condominiums where people do not frequently enter and exit.
For more details on the advantages, disadvantages, and maintenance methods of long sheet waterproofing, please refer to the article below.
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 seems that about 80% of single-family home balconies use FRP waterproofing.
However, it is not suitable for installation on large surface areas, making it less appropriate for rooftop applications.
For more details on the advantages, disadvantages, and maintenance methods of FRP waterproofing, please refer to the article below.
Waterproofing Work | Click here for information on FRP Waterproofing!
6. Asphalt Waterproofing
Asphalt waterproofing is a waterproof sheet made by impregnating synthetic fiber non-woven fabric with asphalt.
The waterproofing shown in the photo is a method where asphalt waterproofing is secured with cinder concrete.
This type of waterproofing is used for large buildings 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 benefit 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 | Learn more about asphalt waterproofing here!
How to Choose a Waterproofing Contractor
There are many waterproofing contractors available in Chuo-ku, Sagamihara.
Among the numerous contractors, there are likely many who feel, “I don’t know who to ask for help…”
Choosing the right contractor can be challenging at first, so I will explain 5 points to consider when requesting waterproofing work.
● Have extensive experience in waterproofing work
● Confirm the availability 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 details of the waterproofing estimate, including the 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 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.
There are also contractors who showcase their achievements on social media like Instagram, so checking those can be effective!
It is also effective to look at waterproofing companies on review sites for reference!
A particularly recommended review site is “Google”, as contractors cannot delete low ratings on their own, making it a trustworthy source of 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, make sure to check 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 have photos taken of 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 be easier to communicate shortly after the work is completed!
Additionally, to detect any issues early, confirm whether they provide thorough aftercare maintenance!
Since non-specialized contractors may not notice signs of problems, having a specialized contractor perform regular aftercare maintenance can help prevent troubles before they occur!
Our company sends out aftercare maintenance DM every year, so if desired, annual aftercare maintenance can be arranged!
Obtain estimates from multiple contractors (at least three)
When requesting waterproofing work, always get 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.
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 in detail!
Check if they perform waterproofing work in-house
Make sure to check if 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 customer 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 done quickly and cost-effectively. Kakeru Koumuten handles everything from on-site surveys to actual construction in-house!
In the unlikely event that a leak or trouble occurs, a company that employs its own craftsmen can respond to and resolve issues quickly!
Carefully check the details of waterproofing estimates, processes, and materials used
Even with the same waterproofing work, there are various types such as “methods,” “materials,” and “processes,” and it is necessary to carry out the work with the optimal method and materials depending on the construction location and existing substrate.
For example, even with the same urethane waterproofing, there are different types of processes such as “adhesion method” and “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 appropriate?”
Thus, 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 Chuo-ku, Sagamihara, please contact Kakeru Koumuten Co., Ltd.
Our company handles many waterproofing projects in Chuo-ku, Sagamihara. Our greatest strength is that we can perform 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 high praise from many customers.
We continue to update our construction achievements 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 perform all exterior renovations, including roofing work, exterior wall painting, and exterior wall overlay methods, in-house.
We are confident that we will not be outdone by other companies in terms of cost, quality, and organization for exterior work!
We welcome competitive estimates with confidence! Our estimates are completely free, and if our company is found to be inferior to others, please feel free to decline!
Click here for exterior renovations in Chuo-ku, Sagamihara!
Click here for exterior wall painting in Chuo-ku, Sagamihara!
Click here for roofing renovations in Chuo-ku, Sagamihara!
Click here for leak repairs in Chuo-ku, Sagamihara!
Characteristics of Chuo-ku, Sagamihara
Chuo-ku, Sagamihara City, Kanagawa Prefecture, is located in the city center and is an area where administration, commerce, and residential development are well balanced. Around Sagamihara Station, administrative agencies, including the city hall, and commercial facilities are concentrated, providing a rich urban function. On the other hand, it is blessed with natural environments such as the Sagami River and Fuchinobe Park, offering a calm living environment.
Additionally, the JR Yokohama Line, Sagami Line, and National Route 16 pass through, providing good access to Hachioji and Yokohama, making it convenient for commuting and schooling. Furthermore, there are universities and research institutions scattered throughout the district, adding an aspect of an educational and research city.
Our company offers a wide range of exterior construction services in Chuo-ku, Sagamihara City. We handle waterproofing, roofing, and exterior wall painting projects.
Please feel free to consult us if you have any concerns!
Waterproofing Service Areas
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo.
List of Areas in Chuo-ku, Sagamihara City
Aioi, Chuo-ku, Sagamihara City / Aoba, Chuo-ku, Sagamihara City / Ohnodai, Chuo-ku, Sagamihara City / Koyama, Chuo-ku, Sagamihara City / Kanumadai, Chuo-ku, Sagamihara City / Kamimizo, Chuo-ku, Sagamihara City / Kamiyabe, Chuo-ku, Sagamihara City / Kyowa, Chuo-ku, Sagamihara City / Koyocho, Chuo-ku, Sagamihara City / Komachido, Chuo-ku, Sagamihara City / Sagamihara, Chuo-ku, Sagamihara City / Shimokuzawa, Chuo-ku, Sagamihara City / Suigou Tana, Chuo-ku, Sagamihara City / Susukinocho, Chuo-ku, Sagamihara City / Seishin, Chuo-ku, Sagamihara City / Takane, Chuo-ku, Sagamihara City / Tana, Chuo-ku, Sagamihara City / Tana Shioda, Chuo-ku, Sagamihara City / Chuo, Chuo-ku, Sagamihara City / Chiyoda, Chuo-ku, Sagamihara City / Namiki, Chuo-ku, Sagamihara City / Hikarigaoka, Chuo-ku, Sagamihara City / Hikawacho, Chuo-ku, Sagamihara City / Higashi Bunyano, Chuo-ku, Sagamihara City / Fujimi, Chuo-ku, Sagamihara City / Fuchinobe Honcho, Chuo-ku, Sagamihara City / Fuchinobe, Chuo-ku, Sagamihara City / Hoshigaoka, Chuo-ku, Sagamihara City / Matsugaoka, Chuo-ku, Sagamihara City / Midorigaoka, Chuo-ku, Sagamihara City / Minamihashimoto, Chuo-ku, Sagamihara City / Miyashita Honcho, Chuo-ku, Sagamihara City / Miyashita, Chuo-ku, Sagamihara City / Yasae, Chuo-ku, Sagamihara City / Yabe Shinmachi, Chuo-ku, Sagamihara City / Yabe Shinden, Chuo-ku, Sagamihara City / Yabe, Chuo-ku, Sagamihara City / Yoko Koen, Chuo-ku, Sagamihara City / Yokoyama, Chuo-ku, Sagamihara City / Yuno Dai, Chuo-ku, Sagamihara City
Consultations via LINE are also 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!
