If you are looking for a waterproofing contractor in Kawasaki-ku, Kawasaki
Contact Kakeru Koumuten

Kakeru Koumuten is a company specializing in exterior renovations based in Kanagawa Prefecture.
We receive many requests for waterproofing work in Kawasaki-ku, ranging from single-family homes to apartment buildings.

“Reasons why Kakeru Koumuten is chosen in Kawasaki-ku”
“About the costs of waterproofing work”
“How to choose a waterproofing contractor”
“About subsidies and grants available for waterproofing work in Kawasaki-ku”

We will explain the above four points!

For customers considering waterproofing work in Kawasaki-ku, Kawasaki, this will definitely be helpful,
so please take a look!

Reasons why Kakeru Koumuten is chosen for waterproofing work in Kawasaki-ku, Kawasaki

Regarding why our company is entrusted with waterproofing work by customers in Kawasaki-ku, Kawasaki,
One reason is that we have a base in Kanagawa Prefecture, but
“Our strengths in waterproofing work that cannot be imitated by other companies”
have received high praise from many customers.

In waterproofing work in Kawasaki-ku, Kawasaki

We are absolutely confident 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 renovation services.
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 the 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.

2.Complete In-House Construction

One of Kakeru Koumuten’s major strengths is complete in-house construction.

From inquiry to project completion, everything is handled by Kakeru Koumuten Co., Ltd., allowing us to keep costs down while providing high-quality waterproofing work. Additionally, one representative will assist you from the estimate to the completion of the work. Since the same person will handle sales and construction management, smooth communication is possible. We are confident in our construction plans and costs, so we welcome competitive estimates!

3. Various Permits and Skilled Workers

We have obtained construction industry permits as well as 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

Our 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 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 confirm the condition of any deterioration.

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 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 construction, which may cause problems, so we have a system in place to keep the same representative throughout the process.

6. Human Resource Development

To enhance skills, we create models of various buildings and conduct practical training. We regularly provide technical improvement education so that each staff member can handle various types of buildings.

Company Overview神奈川で家の外装・屋根の工事、修理なら一番若くて親切な株式会社翔工務店にお任せください。 株式会社翔工務店はリフォームを通して美しく理想の生活空間を創るお手伝いをしています。外装改修、外壁塗装、雨樋修理清掃、屋根の塗装や重ね葺き葺き変えなどの部分的な修理まで、お客様のどのようなご要望にも全力でお応えします。...

Possible Subsidies and Grants for Waterproofing Work in Kawasaki-kuSubsidies and Grants

Tax Reduction for Promoting Long Lifespan of Condominiums (Property Tax Reduction)

Requirements for Tax Reduction for Promoting Long Lifespan of Condominiums

Condominiums over 20 years old

Total number of units: 10 or more

Completion of long lifespan improvement work at least once in the past + completion of the second or subsequent work between April 1, 2023, and March 31, 2027

Certified management plan condominium or has developed/revised a long-term repair plan with advice and guidance from the municipality

The residential floor area of the exclusive part occupies more than 50% of the total

Details of Tax Reduction

Eligible: Property tax on the building portion imposed in the year following the completion of the work.

Maximum Reduction: Up to equivalent to 100㎡ per unit

Tax Reduction Rate: The tax amount within the above range is reduced by 1/2 (50%)

Others

If damage from natural disasters is recognized, it may be covered by fire insurance.

Considerations for waterproofing as damage from 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!

About the Cost of Waterproofing Work

⇧ Construction Menu | For information on waterproofing costs, click here

Examples of Waterproofing Work

BEFORE

AFTER

工事内容  Installation of temporary scaffolding
 Rooftop urethane waterproofing work (ventilated buffer method)
Materials Used  Waterproofing: AGC polymer building materials / Saracene A (high-strength urethane)
 Ventilation sheet: QV sheet Price Range  1,200,000 yen – 1,300,000 yen Construction Period  Approximately 1 month 工事完了月  March 2025 Inquiry Details

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 a quote 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 the issue 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.

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, 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 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 (topcoat) approximately every 8 years (such as urethane waterproofing or FRP waterproofing).
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 of the type of waterproofing, please send us a photo via email or LINE inquiry, and we will help you determine it!

LINE

LINE

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 remains in liquid form, allowing it to be applied to complex shapes and, unlike sheet waterproofing, it can be installed without seams.
It is widely applicable for balconies and rooftops.
For more details on the advantages, disadvantages, and maintenance methods of urethane waterproofing, please refer to the article below.

For more information 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 method is commonly used on large areas such as rooftops.
Compared to urethane waterproofing, it has the advantage of faster installation since there is no waiting for drying, but it is not suitable for complex surfaces.
For more details on the advantages, disadvantages, and maintenance methods of rubber sheet waterproofing, please refer to the article below.

For more information on waterproofing work | Rubber sheet waterproofing, click here!

3. PVC Sheet Waterproofing

PVC sheet waterproofing uses waterproof sheets made of polyvinyl chloride, and like rubber sheet waterproofing, it prevents water intrusion by adhering sheets to the surface.
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, disadvantages, and maintenance methods of PVC sheet waterproofing, 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 shared areas and staircases of condominiums 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 sheet waterproofing, it may have a slightly lower impression of waterproofing capability.
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 on single-family home balconies, with an overwhelmingly short construction period, often completed in as little as one day.
Due to its lightweight nature and low cost, it seems that about 80% of single-family home balconies utilize 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 refers to 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 pressed down with cinder concrete.
This type of waterproofing is adopted for 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 detailed information on the advantages, disadvantages, and maintenance methods of asphalt waterproofing, please refer to the article below.

Waterproofing Work | Click here for information on asphalt waterproofing work!

How to Choose a Waterproofing Contractor

There are many waterproofing contractors available in Kawasaki-ku, Kawasaki.
Among the numerous contractors, I believe there are many people who feel, “I don’t know who to ask…”.
Choosing the right contractor at first can be challenging, so
I will explain 5 points to be careful about when requesting waterproofing work.

● Have extensive experience in waterproofing work

● Check for aftercare and warranty availability

● Obtain estimates from multiple contractors (at least 3 companies)

● Confirm whether they perform waterproofing work in-house

● Carefully check 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.

Confirm whether they have extensive experience in waterproofing work

About 10-20% of waterproofing construction troubles are caused by poor workmanship during the construction process.
To prevent troubles, it is important to hire a reliable contractor with extensive experience!
You need to refer to the contractor’s website for their construction achievements and reviews to make a judgment.
Some contractors showcase their achievements on social media platforms like Instagram, so checking those can also be effective!
It is also effective to look at waterproofing construction companies using review sites for reference!
A particularly recommended review site is “Google”, as contractors cannot arbitrarily delete low ratings, 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 of any construction defects or issues after the work is done, make sure to confirm whether they provide a construction warranty!
Contractors who offer warranties are usually confident in their work, making them more trustworthy companies!

If waterproofing work has been done, make sure to have photos taken of hidden areas during the process for verification!
Check for leaks during rainy weather after the waterproofing work, and if there are any issues, contact the contractor immediately, as it will facilitate smooth communication shortly after the construction!

Additionally, to detect issues early, confirm whether they conduct thorough aftercare maintenance!
Since non-specialized contractors may not notice early signs of problems or troubles, having specialized contractors perform regular aftercare maintenance can help prevent issues before they arise!

Our company sends out aftercare maintenance DM every year, so if desired, annual aftercare maintenance is possible!

Obtain estimates from multiple contractors (at least three)

When requesting waterproofing work, be sure to obtain estimates from multiple contractors. We recommend obtaining estimates from at least three companies.

The costs may vary among contractors even for the same waterproofing work, 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, obtaining estimates from several contractors is essential. When comparing estimates, check not only the costs but also the “types of materials used” and “construction methods” to compare the finer details!

Confirm whether the company performs waterproofing work in-house

Check whether the company performs waterproofing construction 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 the customer’s requests are not 100% 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, process, and materials used in waterproofing estimates

Even for the same waterproofing work, there are various types such as “methods,” “materials,” and “processes,” and it is necessary to use the most suitable method and materials based 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 installation location!

It is important not to judge solely based on cost, but to carefully check whether “the method is appropriate for the substrate?” and “are the materials suitable?”

Thus, if the materials used are only “urethane waterproofing materials,” make sure to check the product name and confirm what kind of materials they are!

If you are looking for a waterproofing contractor in Kawasaki-ku, Kawasaki, please contact Kakeru Koumuten Co., Ltd.

Our company has handled many waterproofing projects in Kawasaki-ku, Kawasaki. Our greatest strength is our ability to carry out 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 high praise from many customers.
We continue to update our construction performance numbers 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 roofing work, exterior wall painting, and exterior wall overlay methods, all in-house for exterior renovations.

We are confident that we will not be outdone by other companies in terms of cost, quality, and organization for exterior work!
We are confident, so we welcome competitive estimates! Our estimates are completely free, and if you find that our company is inferior to others, feel free to decline!

Features of Kawasaki-ku, Kawasaki

Kawasaki-ku, Kawasaki City is located in the eastern part of Kawasaki City and is one of the most vibrant areas in the city, with a population of approximately 230,000 (as of 2023). Geographically, it has the Tamagawa River as its northern boundary and is divided into a coastal area facing Tokyo Bay and an inland area. The coastal area features industrial zones, while the urban side is home to many commercial facilities.
In terms of access, several railway lines, including the JR Tokaido Line, Keihin Tohoku Line, and Keikyu Line, run through the area, making travel to central Tokyo and Yokohama very convenient from Kawasaki Station. Additionally, the Shuto Expressway and National Route 15 are well-developed, allowing for smooth travel by car and public transportation.
Moreover, it is also close to Haneda Airport, making air travel convenient.

The attractions of Kawasaki-ku include its diversity and convenience. Around Kawasaki Station, there are large commercial facilities, restaurants, and cinemas, creating a lively atmosphere. It is also a region where a global vibe is strongly felt, with many tourists from overseas. Furthermore, there are scenic spots, making Kawasaki-ku, Kawasaki City an attractive area that offers everything for work, living, and entertainment.

Our company provides a wide range of exterior construction services in Kawasaki-ku, Kawasaki City. We handle waterproofing, roofing, and exterior wall painting work.
If you have any concerns, please feel free to consult us!

Waterproofing Service Areas

Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo.

List of Areas in Kawasaki-ku, Kawasaki City

Kawasaki-ku Asada / Kawasaki-ku Asahimachi / Kawasaki-ku Ikegami Shinmachi / Kawasaki-ku Ikegamimachi / Kawasaki-ku Ikeda / Kawasaki-ku Sunako / Kawasaki-ku Isemachi / Kawasaki-ku Egawa / Kawasaki-ku Ekimae Honmachi / Kawasaki-ku Enokicho / Kawasaki-ku Oiwakecho / Kawasaki-ku Oshima / Kawasaki-ku Oshima Kamimachi / Kawasaki-ku Ogawamachi / Kawasaki-ku Oda / Kawasaki-ku Oda Sakae / Kawasaki-ku Kaizuka / Kawasaki-ku Kawanakajima / Kawasaki-ku Kyomachi / Kawasaki-ku Kokan Dori / Kawasaki-ku Sakaimachi / Kawasaki-ku Sakuramoto / Kawasaki-ku Shimonamiki / Kawasaki-ku Showa / Kawasaki-ku Shinkawa Dori / Kawasaki-ku Daimachi / Kawasaki-ku Tajimacho / Kawasaki-ku Tamachi / Kawasaki-ku Daishi Ekimae / Kawasaki-ku Tsutsumine / Kawasaki-ku Dekino / Kawasaki-ku Tonomachi / Kawasaki-ku Nakajima / Kawasaki-ku Nakase / Kawasaki-ku Nisshincho / Kawasaki-ku Hamamachi / Kawasaki-ku Higashidacho / Kawasaki-ku Higashimonzen / Kawasaki-ku Hinode / Kawasaki-ku Fujisaki / Kawasaki-ku Horinouchicho / Kawasaki-ku Honmachi / Kawasaki-ku Minatomachi / Kawasaki-ku Minamimachi / Kawasaki-ku Miyamaecho / Kawasaki-ku Miyamotocho / Kawasaki-ku Motoki / Kawasaki-ku Yotsuya Kamimachi / Kawasaki-ku Watada / Kawasaki-ku Watada Sannocho / Kawasaki-ku Watada Shinmachi / Kawasaki-ku Watada Higashimachi / Kawasaki-ku Watada Mukaimachi

Consultations via LINE are also very welcome◎

LINE

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We are also updating our Instagram regularly◎ Please follow us!◎

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神奈川で屋根・雨樋・外装の工事、修理なら
株式会社翔工務店へ

株式会社翔工務店は平均年齢20代後半の若い会社ですが、技術はどこにも負けていません。

いちばんの強みは、足場工事、屋根工事、塗装工事とすべて自社で行えること。一般には分業されるこの業界にあって、一式で頼めるので管理に手間がかからず、コストも抑えることが出来ます。何より、トラブルがあればすぐにかけつけます!

自信をもって、宣言できます。私たちは、神奈川で一番若くて親切なリフォーム屋です!