If you are looking for a waterproofing contractor in Tsurumi-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 Tsurumi-ku, from single-family homes to apartment buildings.
“Reasons why Kakeru Koumuten is chosen in Tsurumi-ku”
“About the costs of waterproofing work”
“How to choose a waterproofing contractor”
“Subsidies and grants available for waterproofing work in Tsurumi-ku”
We will explain the above four points!
This will definitely be helpful for customers considering waterproofing work in Tsurumi-ku, Yokohama, so
please take a look!
Reasons why Kakeru Koumuten is chosen for waterproofing work in Tsurumi-ku, Yokohama
The reasons why our company is entrusted with waterproofing work by customers in Tsurumi-ku, Yokohama include
one reason being that we have a base in Yokohama,
“Our unique strengths in waterproofing work that cannot be imitated by other companies”
which has received high praise from many customers.
We are absolutely confident in “cost,” “quality,” and “plans,” so
we would appreciate it if you could compare our estimates with those from 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 exterior renovations such as waterproofing at lower costs and faster.
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 conducting scaffolding work with our own scaffolding team instead of outsourcing, we can also cut costs related to 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 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 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. 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 permits for construction work and industrial waste collection and transportation!
We also have qualified personnel on staff and 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 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.
During leak investigations, we can also conduct surveys 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; therefore, 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 so that each staff member can handle various buildings.
Subsidies and Grants Related to Waterproofing Work in Tsurumi-ku, Yokohama
If damage caused by 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 it is covered by fire insurance, please feel free to contact us!
Property Tax Reduction System for Condominiums with 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 carried out 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 Cost of Waterproofing Work
⇧ Construction Menu | Click here for waterproofing costs
Customer Testimonials
カテゴリ ‘voice’ は見つかりません
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customer reviews
Asao-ku, Kawasaki City | We received reviews about the ridge cap and rain gutter replacement work!
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customer reviews
Kohoku-ku, Yokohama | We received reviews about the roof overlay (cover method)!
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customer reviews
Kohoku-ku, Yokohama | We Received Reviews About Exterior Painting!
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customer reviews
Aoba-ku, Yokohama | We received reviews about our exterior fence construction!
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customer reviews
Tsurumi-ku, Yokohama | We received reviews about roof and exterior wall painting, as well as metalwork and rain gutter replacement work!
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customer reviews
Higashiyamato City, Tokyo | We received reviews about exterior painting and roof overlay (cover method)!
Examples of Waterproofing Work
| Construction Details |
| Urethane waterproofing ventilation buffer method / High-strength urethane type Existing waterproofing: PVC sheet waterproofing |
| Materials Used |
| Waterproofing: AGC polymer building materials / Saracene A (high-strength urethane) Ventilation sheet: QV sheet Vent pipe: Stainless steel Replaced with renovation drain |
| Price Range |
| 700,000 to 800,000 yen |
| Construction Period |
| Approximately 2 weeks |
| Completion Month |
| May 2024 |
| Inquiry Details |
| We 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 controlled by the ventilation sheet and expelled through a “ventilation pipe.”
This can prevent the most common issue with waterproofing: 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 Already Occurring
If leaks are already occurring, it is necessary to address them promptly before the damage worsens.
If left unattended, it can negatively affect the interior and underlying structures, so it is essential to stop the leaks quickly.
Bulging or Cracking of the Waterproof Layer
If the waterproof area is cracked, it can lead to rainwater intrusion.
If the waterproof layer is bulging, it indicates that moisture is accumulating within the layer.
Bulging can lead to cracks, which may 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 Durability Years
Generally, the durability of waterproofing work is between 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 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.
Before curing, it is in liquid form, allowing it to be applied to complex shapes, and unlike sheet waterproofing, it can be applied without seams, which is a significant advantage.
It can be widely applied to balconies, rooftops, and more.
We provide detailed explanations about the advantages, disadvantages, and maintenance methods of urethane waterproofing in the article below.
For more information on waterproofing work | Urethane Waterproofing, click here!
2. Rubber Sheet Waterproofing
Rubber sheet waterproofing involves attaching synthetic rubber sheets to the surface to prevent water intrusion.
This type of waterproofing is often 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.
We provide detailed explanations about the advantages, disadvantages, and maintenance methods of rubber sheet waterproofing in the article below.
For more information 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, as well as maintenance methods, please refer to the article below.
For waterproofing work | Click here for PVC sheet waterproofing work!
4. Long Sheet Waterproofing
Long sheet waterproofing, officially known as “anti-slip vinyl floor sheet,” is commonly applied in shared areas of apartments and on stairs 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 enter.
For more detailed information on the advantages and disadvantages of long sheet waterproofing, as well as maintenance methods, please refer to the article below.
For waterproofing work | Click here for long sheet waterproofing work!
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, and the construction period is significantly short, 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 construction on large surface areas, making it less appropriate for rooftops.
For more detailed information on the advantages and disadvantages of FRP waterproofing, as well as maintenance methods, please refer to the article below.
Waterproofing Work | Click here for 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 Asphalt Waterproofing!
How to Choose a Waterproofing Contractor
There are many waterproofing contractors available in Tsurumi-ku, Yokohama.
Among the numerous contractors, I believe there are many people who feel “I don’t know who to ask..”.
Choosing the right contractor can be challenging at first, so I will explain 5 points to keep in mind 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 details, processes, and materials used in the waterproofing estimate
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 platforms 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”.
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 whether they provide a “construction warranty”!
Contractors who offer warranties tend to have confidence in their work, making them more trustworthy companies!
If waterproofing work is done, make sure to take photos of the unseen 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 completed!
Additionally, to ensure early detection of any issues that may arise, confirm whether they conduct thorough aftercare maintenance!
Since non-specialized contractors may not notice early signs of problems or troubles, having a specialized contractor perform regular aftercare maintenance can prevent issues before they occur!
Our company sends out aftercare maintenance direct mail every year, so if desired, annual aftercare maintenance is possible!
Obtain estimates from multiple contractors (at least 3)
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, be sure to check not only the costs but also the details such as “types of materials used” and “construction methods”!
Confirm whether they perform waterproofing work in-house
Check whether they perform waterproofing work in-house!
If a sales company investigates and then requests a subcontractor, it will take more time and cost.
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, it enables responsible waterproofing work that is quick and cost-effective. Kakeru Koumuten conducts everything from on-site surveys to actual construction in-house!
Moreover, if rain leaks or troubles occur, a company that employs 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 methods and materials depending on the construction site and existing substrate.
For example, even with the same urethane waterproofing, there are different processes such as “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.” 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 Tsurumi-ku, Yokohama, please contact Kakeru Koumuten Co., Ltd.
Our company has handled many waterproofing projects in Tsurumi-ku, Yokohama.
Our greatest strength is that we can perform everything from proposals to temporary scaffolding installation and waterproofing work in-house!
Kakeru Koumuten Co., Ltd. promises “high-quality waterproofing work at low cost”, and we have received great feedback from many customers.
We continue to update our 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 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!
Estimates are completely free, and if our company is found to be inferior to others, you are welcome to decline!
Click here for exterior renovations in Tsurumi-ku, Yokohama!
Click here for exterior wall painting in Tsurumi-ku, Yokohama!
Click here for roofing renovations in Tsurumi-ku, Yokohama!
Click here for exterior wall overlay work in Tsurumi-ku, Yokohama!
Click here for leak repairs in Tsurumi-ku, Yokohama!
Characteristics of Tsurumi-ku, Yokohama
Tsurumi-ku, Yokohama is an area that combines nature with convenient urban functions!
Located in the eastern part of Yokohama, it covers an area of approximately 33km2, making Tsurumi-ku the third largest ward in Yokohama after Aoba-ku.
It is situated at a midpoint between Tokyo and Yokohama, characterized by its industrial areas and global atmosphere.
Additionally, multiple train lines run through the area, making it easy to travel to Tokyo and Yokohama’s city center.
The Shuto Expressway Bayshore Route and National Route 15 (Daiichi Keihin) also provide comfortable access by car.
Along the Tsurumi River flowing through the ward, people enjoy cycling and walking, allowing residents to experience nature within the city. The changing scenery throughout the seasons is also a charm of Tsurumi-ku.
If you live in Tsurumi-ku and have any concerns regarding waterproofing work or your home, please feel free to contact us!
Waterproofing Work Service Area
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo.
List of Areas in Tsurumi-ku, Yokohama
Asahi-cho, Tsurumi-ku, Yokohama / Anzen-cho, Tsurumi-ku, Yokohama / Ichiba Kamimachi, Tsurumi-ku, Yokohama / Ichiba Shimomachi, Tsurumi-ku, Yokohama / Ichiba Nakanaka-cho, Tsurumi-ku, Yokohama / Ichiba Higashinaka-cho, Tsurumi-ku, Yokohama / Ichiba Fujimimachi, Tsurumi-ku, Yokohama / Ichiba Yamato-cho, Tsurumi-ku, Yokohama / Shioda-cho, Tsurumi-ku, Yokohama / Egasaki-cho, Tsurumi-ku, Yokohama / Oogishima, Tsurumi-ku, Yokohama / Ono-cho, Tsurumi-ku, Yokohama / Kajiyama, Tsurumi-ku, Yokohama / Kamisueyoshi, Tsurumi-ku, Yokohama / Kamino-miya, Tsurumi-ku, Yokohama / Kansei-cho, Tsurumi-ku, Yokohama / Kishiya, Tsurumi-ku, Yokohama / Kitatera-o, Tsurumi-ku, Yokohama / Komaoka, Tsurumi-ku, Yokohama / Eitouchou, Tsurumi-ku, Yokohama / Shioiri-cho, Tsurumi-ku, Yokohama / Shishigaya, Tsurumi-ku, Yokohama / Shimono-yata-cho, Tsurumi-ku, Yokohama / Shirite, Tsurumi-ku, Yokohama / Shimomusubiyoshi, Tsurumi-ku, Yokohama / Suehiro-cho, Tsurumi-ku, Yokohama / Sugazawa-cho, Tsurumi-ku, Yokohama / Suwa-zaka, Tsurumi-ku, Yokohama / Daikoku-cho, Tsurumi-ku, Yokohama / Daikoku-futo, Tsurumi-ku, Yokohama / Daito-cho, Tsurumi-ku, Yokohama / Tsukudano-cho, Tsurumi-ku, Yokohama / Tsurumi Chuo, Tsurumi-ku, Yokohama / Tsurumi, Tsurumi-ku, Yokohama / Teratani, Tsurumi-ku, Yokohama / Toyooka-cho, Tsurumi-ku, Yokohama / Nakadori, Tsurumi-ku, Yokohama / Ikumugi, Tsurumi-ku, Yokohama / Hamamachi, Tsurumi-ku, Yokohama / Baba, Tsurumi-ku, Yokohama / Higashi Terao Kitadai, Tsurumi-ku, Yokohama / Higashi Terao Nakadai, Tsurumi-ku, Yokohama / Higashi Terao Higashidai, Tsurumi-ku, Yokohama / Higashi Terao, Tsurumi-ku, Yokohama / Heian-cho, Tsurumi-ku, Yokohama / Benten-cho, Tsurumi-ku, Yokohama / Honmachi-dori, Tsurumi-ku, Yokohama / Mitsuike Park, Tsurumi-ku, Yokohama / Mukai-cho, Tsurumi-ku, Yokohama / Motomiya, Tsurumi-ku, Yokohama / Yahata, Tsurumi-ku, Yokohama
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!
