If you are looking for a waterproofing contractor in Yokosuka City
Contact Kakeru Koumuten
Kakeru Koumuten is a specialized exterior renovation company located in Kanagawa Prefecture.
We receive many requests for waterproofing work in Yokosuka City, from single-family homes to apartment buildings.
“Reasons why Kakeru Koumuten is chosen in Yokosuka City”
“About the costs of waterproofing work”
“How to choose a waterproofing contractor”
“Subsidies and grants available for waterproofing work in Yokosuka City”
We will explain the above four points!
This will definitely be helpful for customers considering waterproofing work in Yokosuka City,
so please take a look!
Reasons why Kakeru Koumuten is chosen for waterproofing work in Yokosuka City
One reason our company is trusted with waterproofing work by customers in Yokosuka City is that
we have a base in Kanagawa Prefecture,
and we have unique strengths in waterproofing work that cannot be imitated by other companies, which has earned us many satisfied customers.
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.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 conducting 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 can be achieved in waste disposal expenses.
Exterior Renovation Dedicated Showroom
In our showroom, not only can you have meetings, but you can also
directly check the actual structures 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 construction industry permits as well as 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 address the issue!
Additionally, aftercare maintenance is available every year, and we will send you a DM reminder for aftercare maintenance each year.
During aftercare maintenance, we will check the entire waterproofing system and assess the condition of any deterioration.
5. Flexible and Prompt Response
Our company is equipped to handle various troubles and situations.
If we cannot access the rooftop for waterproofing checks, we will utilize drones to assess the condition.
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 we have established a system to keep the same representative throughout the process.
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 types of buildings.
Subsidies and Grants for Waterproofing Work in Yokosuka City
If damage caused by 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 damage.”
If you are unsure whether your fire insurance applies, please feel free to contact us!
Fiscal Year 7 Elderly Housing Renovation Subsidy
In Yokosuka City, to ensure that elderly residents affected by rising prices can live safely for a long time, and to revitalize the local economy, we are implementing a subsidy program for elderly housing renovations.
Fiscal Year 7 Elderly Housing Renovation Subsidy
Overview of the Program
Condominium Longevity Promotion Tax System
Due to the tax reform in Fiscal Year 5, a special measure has been established to reduce fixed property tax for condominiums that meet certain requirements and have undergone large-scale repairs, in order to promote the longevity of condominiums.
Condominium Longevity Promotion Tax System
For more details, please refer to the Ministry of Land, Infrastructure, Transport and Tourism website (external site)
Cost of Waterproofing Work
⇧Service 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 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 I am worried about leaks. ・I would like an estimate for a complete waterproof renovation, not just partial repairs or a top coat. ・I learned that urethane waterproofing has high waterproofing properties, so I would like an estimate for urethane waterproofing. ・Since this is my first waterproofing project, I would like to compare estimates. |
Our Proposal
Since you mentioned wanting to renovate with a long-lasting method rather than just protective agents like top coats, we proposed a complete “urethane waterproofing project” for the rooftop.
If urethane waterproofing is applied using the adhesion method, air rising from the building can cause bulges in the waterproof layer, so we proposed the “urethane waterproofing ventilation buffer method.”
The ventilation buffer method involves applying a ventilation buffer sheet over the entire area before applying 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 pipe.”
This can prevent the most common problem with waterproofing, which is bulging of the waterproof layer!
After explaining the materials and methods, you entrusted us with the project among the four estimates!
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 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.
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, 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 an 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 “slip-resistant 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 aesthetics.
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 performance.
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 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 seems that about 80% of single-family home balconies use FRP waterproofing.
However, it is not suitable for construction on large 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 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 type of waterproofing is used in 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 major 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 Asphalt Waterproofing!
How to Choose a Waterproofing Contractor
There are many waterproofing contractors available in Yokosuka City.
Among the numerous contractors, there are likely many who feel “I don’t know who to ask…”.
Choosing the right contractor can be challenging at first, so here are 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 of the waterproofing estimate, including processes and materials used
By confirming the above 5 points, you will be able to choose a reliable contractor.
Check if they have extensive experience in waterproofing work
About 10-20% of waterproofing work troubles are caused by construction defects during the installation.
It is important to hire a reliable contractor with experience to prevent troubles!
You need to refer to the contractor’s website for their past work 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 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 if they provide a “construction warranty”!
Contractors who offer warranties tend to be 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 the communication will be smoother shortly after the work is completed!
Additionally, to ensure early detection of any issues that may arise, confirm if they provide thorough aftercare maintenance!
If the contractor is not specialized, they may not notice signs of trouble, so having a specialized contractor conduct regular aftercare maintenance can help prevent issues before they arise!
Our company sends out aftercare maintenance DM every year, so if you wish, annual aftercare maintenance 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.
Moreover, 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, be sure to check not only the costs but also 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 more time and cost.
Additionally, 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 conducts everything from on-site surveys to actual construction in-house!
Furthermore, if leaks or troubles occur, a company that employs its own craftsmen can respond to and resolve issues quickly!
Carefully Check the Details of the Waterproofing Estimate, Process, and Materials
Even for the same waterproofing work, there are various types such as “method,” “materials,” and “process,” 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?”
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 Yokosuka City, please contact Kakeru Koumuten Co., Ltd.
Our company has handled many waterproofing projects in Yokosuka City.
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 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 projects!
In addition to waterproofing work, we can carry out all exterior renovations, including roofing work, exterior painting, and exterior cover methods, 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, please feel free to decline!
For exterior renovations in Yokosuka City, click here!
For exterior painting in Yokosuka City, click here!
For roofing renovations in Yokosuka City, click here!
For leak repairs in Yokosuka City, click here!
Features of Yokosuka City
Yokosuka City, Kanagawa Prefecture, is located in the southeastern part of the Miura Peninsula and is a nature-rich city surrounded by the sea on the east and west.
The east faces Tokyo Bay, while the west faces Sagami Bay, characterized by a warm maritime climate. Compared to Tokyo, the average monthly temperature is about 1 degree lower, making summers cool and winters warm. Additionally, there is almost no snowfall, making it a comfortable area to live in.
Transportation access is also excellent, with the Keihin Kyuko Railway (Keikyu) running vertically through the city. From the main station, Yokosuka Chuo Station, it takes about 25 minutes to reach Yokohama Station and about 45 minutes to reach Shinagawa Station directly. Furthermore, it takes about 50 minutes to reach Haneda Airport, making it a convenient location for commuting and travel.
Within the city, there are U.S. Navy bases and Self-Defense Forces bases, creating a vibrant international atmosphere. Notable tourist spots include “Uraga,” known as the landing site of Commodore Perry, the exotic “Dobuita Street,” and “Kurihama Flower Park,” where you can enjoy seasonal flowers, showcasing a variety of attractions. Additionally, the area is rich in seafood, with many markets and restaurants offering fresh seafood.
Thus, Yokosuka City is a livable town where the natural environment and urban functions are in harmony, and it is also gaining attention as a tourist destination and a place to relocate due to its good access to the city center.
At Kakeru Koumuten Co., Ltd., we undertake exterior construction work in Yokosuka City. We provide a wide range of services including waterproofing, roof replacement, roof overlay (cover method), exterior wall painting, and roof painting.
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.
Yokosuka City Area List
Yokosuka City Akiya / Yokosuka City Ashina / Yokosuka City Abekura / Yokosuka City Awata / Yokosuka City Anbindai / Yokosuka City Ikegami / Yokosuka City Ikedacho / Yokosuka City Inaoka / Yokosuka City Inuitomachi / Yokosuka City Iwatoto / Yokosuka City Uchikawa / Yokosuka City Uchikawa Shinden / Yokosuka City Uraga / Yokosuka City Uragaoka / Yokosuka City Uragaminosato / Yokosuka City Uragomachi / Yokosuka City Kamimachi / Yokosuka City Otawada / Yokosuka City Otaki / Yokosuka City Otsu / Yokosuka City Oyabe / Yokosuka City Ogawa / Yokosuka City Ogino / Yokosuka City Ouhama Higashimachi / Yokosuka City Ouhama Minamimachi / Yokosuka City Ouhama Honmachi / Yokosuka City Ouhama Machi / Yokosuka City Obara Dai / Yokosuka City Kanaya / Yokosuka City Kamoi / Yokosuka City Kinugasa Eicho / Yokosuka City Kinugasa Machi / Yokosuka City Kogyocho / Yokosuka City Kusunokigawacho / Yokosuka City Kubisato / Yokosuka City Kumura / Yokosuka City Kurihama / Yokosuka City Kurihama Dai / Yokosuka City Green Heights / Yokosuka City Kofuudai / Yokosuka City Koyasu / Yokosuka City Koyabe / Yokosuka City Sakamotocho / Yokosuka City Sakuragaoka / Yokosuka City Sazima / Yokosuka City Sazima no Oka / Yokosuka City Sanocho / Yokosuka City Sawara / Yokosuka City Sarushima / Yokosuka City Shioiricho / Yokosuka City Shiomidai / Yokosuka City Shonan Kokusai Mura / Yokosuka City Shonan Takatomi / Yokosuka City Shinminatocho / Yokosuka City Shinmeicho / Yokosuka City Sugatani / Yokosuka City Tanaura Izumi / Yokosuka City Tanaura Daisakucho / Yokosuka City Tanaura Minatocho / Yokosuka City Tanauramachi / Yokosuka City Takatomi / Yokosuka City Take / Yokosuka City Tadatodai / Yokosuka City Tsukui / Yokosuka City Tsurugaoka / Yokosuka City Tomari / Yokosuka City Nagai / Yokosuka City Nagaura Machi / Yokosuka City Nagasaka / Yokosuka City Nagasawa / Yokosuka City Nagase / Yokosuka City Natsushima Machi / Yokosuka City Nishi Uraga / Yokosuka City Nishi Itsubimicho / Yokosuka City Negishi / Yokosuka City Nobi / Yokosuka City Highland / Yokosuka City Hazaki Machi / Yokosuka City Hashirimizu / Yokosuka City Hamamidai / Yokosuka City Hayashi / Yokosuka City Higashi Uraga / Yokosuka City Higashi Itsubimicho / Yokosuka City Hikari no Oka / Yokosuka City Hinodecho / Yokosuka City Heisaku / Yokosuka City Fukadadai / Yokosuka City Fujimicho / Yokosuka City Futaba / Yokosuka City Funakura / Yokosuka City Funakoshimachi / Yokosuka City Heiseicho / Yokosuka City Heiwadai / Yokosuka City Itsubimi ga Oka / Yokosuka City Bouyoudai / Yokosuka City Honmachi / Yokosuka City Umabori Kaigan / Yokosuka City Umaborimachi / Yokosuka City Midorigaoka / Yokosuka City Minato ga Oka / Yokosuka City Minami Uraga / Yokosuka City Miharu Machi / Yokosuka City Miyukihama / Yokosuka City Morisaki / Yokosuka City An’yuu Machi / Yokosuka City Yamashina Dai / Yokosuka City Yamanaka Machi / Yokosuka City Yoshii / Yokosuka City Yoshikura Machi / Yokosuka City Yonegahama Dori / Yokosuka City Wakamatsu Machi / Yokosuka City Wakamiya Dai
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!
