If you are looking for a waterproofing contractor in Aoba-ku, Yokohama
Contact Kakeru Koumuten
Kakeru Koumuten is a company specializing in exterior renovations based in Yokohama.
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”
“About the costs of waterproofing work”
“How to choose a waterproofing contractor”
“Subsidies and grants applicable to waterproofing work in Aoba-ku”
We will explain the above four points!
This will definitely be helpful 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
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 Yokohama. However,
“Our 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 waterproofing and other exterior renovations.
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 construction.
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 structure and color variations.
2．Complete In-House Construction
One of Kakeru Koumuten’s major strengths is its complete in-house construction.
From inquiry to 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 qualified professionals 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 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 project completion!
Changing representatives frequently can lead to miscommunication regarding the details and precautions of the work, which could cause issues, so we maintain 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 each staff member can handle various types of buildings.
Subsidies and Grants Potentially Applicable to Waterproofing Work in Aoba-ku, Yokohama
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 the waterproof sheet 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!
Property Tax Reduction System for Condominiums Subject to Major Repairs (Condominium Longevity Promotion Tax System)
To promote the longevity of condominiums, for those that meet certain requirements, if major repairs contributing to longevity are conducted between April 1, 2023, and March 31, 2027, and necessary documents are submitted to the Tax Division of the Ward Office within three months of the completion of the work, there is a system that reduces the property tax amount for the following fiscal year by half for the relevant condominium.
Condominium Longevity Promotion Tax System
Yokohama City Official Website
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)!
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 have received the following inquiries from our customer. ・There are wrinkles and bulges in the waterproof sheet on the roof, 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, 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 work” for the roof.
If urethane waterproofing is applied using the adhesion method, air rising from the building can cause bulges in the waterproof layer, so we proposed the “urethane waterproofing ventilation buffer method.”
The ventilation buffer method involves applying a ventilation buffer sheet over the entire area before installing the urethane waterproofing.
By applying the ventilation buffer sheet first, the air rising from the building is suppressed by the ventilation sheet and discharged through the “ventilation pipe.”
This can prevent the most common issue with waterproofing, which is bulging of the waterproof layer!
After explaining the materials and methods, you entrusted the work to us from among the estimates of four companies!
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 adversely 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 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 that involves applying liquid polyurethane resin to the waterproofing surface.
Since it is liquid before curing, it can be applied to complex shapes, and unlike sheet waterproofing, it can be installed without seams, which is a significant advantage.
It can be widely applied to balconies, rooftops, and more.
For more details on the advantages, disadvantages, and maintenance methods of urethane waterproofing, please refer to the article below.
For more on waterproofing work | Urethane waterproofing, click here!
2. Rubber Sheet Waterproofing
Rubber sheet waterproofing involves adhering synthetic rubber sheets to the surface to prevent water intrusion.
This type of waterproofing is commonly used for large areas such as rooftops.
Compared to urethane waterproofing, it has the advantage of faster installation since there is no waiting for drying, but it is not suitable for complex surfaces.
For more details on the advantages, disadvantages, and maintenance methods of rubber sheet waterproofing, please refer to the article below.
For more on waterproofing work | Rubber sheet waterproofing, click here!
3. PVC Sheet Waterproofing
PVC sheet waterproofing is a waterproof sheet made of polyvinyl chloride, which, like rubber sheet waterproofing, is 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 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 flooring sheet,” is commonly applied in shared areas and staircases 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 have 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 on single-family home balconies, with an overwhelmingly short construction period, often completed in just 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 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 refers to a waterproof sheet that has asphalt permeated into synthetic fiber non-woven fabric.
The waterproofing shown in the photo is a method where asphalt waterproofing is pressed down with cinder concrete.
This type of waterproofing is adopted for buildings with large areas 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 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 Aoba-ku, Yokohama.
Among the numerous contractors, many people may feel “I don’t know who to ask…”.
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
● Confirm the presence of aftercare and warranty
● Obtain estimates from multiple contractors (at least 3 companies)
● Check if they perform waterproofing work in-house
● Carefully review the contents of the waterproofing estimate, process, and materials used
By confirming the above 5 points, you will be able to choose a reliable contractor.
Check if they have extensive experience in waterproofing work
About 10-20% of waterproofing construction troubles are caused by poor workmanship during 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 past work 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 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 hiring.
Check if there is aftercare maintenance and construction warranty
In case any construction defects or issues occur after installation, 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 confirmation!
Check for leaks during rainy weather after the waterproofing work, and if there are any issues, contact the contractor immediately as it will facilitate smooth communication shortly after the work is done!
Also, to detect any issues early, confirm if they will 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 you wish, annual aftercare maintenance is possible!
Obtain estimates from multiple contractors for waterproofing work (at least 3 companies)
When requesting waterproofing work, always 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 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 details such as “types of materials used” and “construction methods”!
Confirm if they perform waterproofing work in-house
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 your requests are not fully communicated to the subcontractor, leading to troubles.
By having one company handle everything from sales to construction, responsible waterproofing work can be done quickly and cost-effectively. Kakeru Koumuten handles everything from on-site surveys to actual construction in-house!
Also, in the unlikely event of leaks or troubles, 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 “ventilation 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 work area!
It is important not to judge solely based on cost, but to carefully check whether “the method is appropriate for the base material?” and “are the materials suitable?”
So, if the materials used are only “urethane waterproofing materials,” let’s confirm the product name and check what kind of materials they are!
If you are looking for a waterproofing contractor in Aoba-ku, Yokohama, please contact Kakeru Koumuten Co., Ltd.
Our company has handled many waterproofing projects in Aoba-ku, Yokohama.
Our greatest strength is that we can carry out everything from proposals to the installation of temporary scaffolding and waterproofing work in-house!
Kakeru Koumuten Co., Ltd. promises “high-quality waterproofing work at low cost”, and we have received high praise from many customers.
We continue to update our construction performance each year, 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 covering methods all in-house.
We are confident that we will not be outdone by other companies in terms of cost, quality, and efficiency in exterior 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 without hesitation!
Click here for exterior renovations in Aoba-ku, Yokohama!
Click here for exterior painting in Aoba-ku, Yokohama!
Click here for roofing renovations in Aoba-ku, Yokohama!
Click here for exterior covering work in Aoba-ku, Yokohama!
Click here for leak repairs in Aoba-ku, Yokohama!
Features of Aoba-ku, Yokohama
Aoba-ku, Yokohama, is an area characterized by a rich natural environment and convenient transportation access. It is home to one of Japan’s largest zoos, “Yokohama Zoo Zoorasia,” and “Kodomo Nature Park,” which has one of the largest areas in Yokohama, along with many parks and green spaces, providing plenty of relaxing spots. Additionally, residential areas are well-developed, making it a comfortable place to live.
Aoba-ku, Yokohama has the lowest average summer temperature in the city, and the reason for this relatively low average temperature is its inland location, which leads to significant cooling in the mornings and evenings. Additionally, green spaces surrounding the area help to mitigate the heat island effect.
A famous station in Aoba-ku, Yokohama is,
・Futamatagawa Station
This is a major station on the Sotetsu Line and serves as a central hub for Aoba-ku. It offers convenient access to Yokohama Station and Shinjuku, with plenty of shopping malls and facilities in the vicinity.
・Tsurugamine Station
This station on the Sotetsu Line is surrounded by residential areas and commercial facilities. It is a major station alongside Futamatagawa Station and serves as a transportation hub for the region.
If you live in Aoba-ku, Yokohama, and have any concerns regarding waterproofing work or issues related to your home, please feel free to contact us!
Waterproofing Service Areas
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo.
List of Areas in Aoba-ku, Yokohama
Aoba-ku, Yokohama, Ichizawa-cho / Aoba-ku, Yokohama, Imagawa-cho / Aoba-ku, Yokohama, Imajuku / Aoba-ku, Yokohama, Imajuku Higashimachi / Aoba-ku, Yokohama, Imajuku Nishimachi / Aoba-ku, Yokohama, Imajuku Minamimachi / Aoba-ku, Yokohama, Imajuku-cho / Aoba-ku, Yokohama, Oike-cho / Aoba-ku, Yokohama, Odaka-cho / Aoba-ku, Yokohama, Kashiwamachi / Aoba-ku, Yokohama, Kanagatani / Aoba-ku, Yokohama, Kamikawai-cho / Aoba-ku, Yokohama, Kamishirane / Aoba-ku, Yokohama, Kamishirane-cho / Aoba-ku, Yokohama, Kawai-juku-cho / Aoba-ku, Yokohama, Kawai Honmachi / Aoba-ku, Yokohama, Kawashima-cho / Aoba-ku, Yokohama, Kirigasaku / Aoba-ku, Yokohama, Sakonyama / Aoba-ku, Yokohama, Sasanodai / Aoba-ku, Yokohama, Sachigaoka / Aoba-ku, Yokohama, Santanda-cho / Aoba-ku, Yokohama, Shikibidai / Aoba-ku, Yokohama, Shimokawai-cho / Aoba-ku, Yokohama, Shirane / Aoba-ku, Yokohama, Shirane-cho / Aoba-ku, Yokohama, Zenbu-cho / Aoba-ku, Yokohama, Toyoka-cho / Aoba-ku, Yokohama, Tsurugamine / Aoba-ku, Yokohama, Tsurugamine Honmachi / Aoba-ku, Yokohama, Nakao / Aoba-ku, Yokohama, Nakakibougai / Aoba-ku, Yokohama, Nakazawa / Aoba-ku, Yokohama, Nakashirane / Aoba-ku, Yokohama, Nishikawashima-cho / Aoba-ku, Yokohama, Higashikibougai / Aoba-ku, Yokohama, Futamatagawa / Aoba-ku, Yokohama, Honjuku-cho / Aoba-ku, Yokohama, Honmura-cho / Aoba-ku, Yokohama, Mankigahara / Aoba-ku, Yokohama, Minami Kibougai / Aoba-ku, Yokohama, Minami Honjuku-cho / Aoba-ku, Yokohama, Yashiro-cho / Aoba-ku, Yokohama, Wakabadai
Consultations via LINE are also very welcome◎
We are also regularly updating our Instagram◎ Please follow us!◎
AAA is a young company with an average age in the early 20s, but our technology is second to none.
One of our greatest strengths is that we can do all of our own scaffolding, roofing, and painting work. In this industry, where work is generally divided, we are able to provide a complete set of services, which saves time and effort in management and reduces costs. Above all, if there is any trouble, we will come to you right away!
We can confidently declare this. We are the youngest and most friendly renovator in Kanagawa!
