Leave Your Waterproofing Work in Midori-ku, Sagamihara to Kakeru Koumuten Co., Ltd.!

If you are looking for a waterproofing contractor in Aoba-ku, Sagamihara,
please contact Kakeru Koumuten.

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

“Reasons why Kakeru Koumuten is chosen in Aoba-ku, Sagamihara”
“About the costs of waterproofing work”
“How to choose a waterproofing contractor”
“About subsidies and grants applicable to waterproofing work in Aoba-ku, Sagamihara”
We will explain the above four points!

This will definitely be helpful for customers considering waterproofing work in Aoba-ku, Sagamihara, so
please take a look!

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

Regarding why our company is entrusted with waterproofing work by customers in Aoba-ku, Sagamihara,
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.

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 renovations.
We have established 5 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 detached houses!

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 procure materials at a lower cost! Additionally, we always have waterproofing components in stock, allowing us to respond quickly to emergency waterproofing work!

In-house separation of waste materials

In waterproofing work, various waste materials are generated. Most contractors dispose of them all together, but by sorting and recycling waste materials, significant cost reductions in waste disposal can be achieved.

Exterior Renovation Dedicated Showroom

In our showroom, not only can you have meetings, but you can also directly check the actual structures and colors available.

2．Complete In-House Construction

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

From inquiry to project completion, everything is handled by Kakeru Koumuten Co., Ltd., allowing us to keep costs down while providing high-quality waterproofing work. Additionally, one representative will assist you from the estimate to the completion of the project. Since the same person will handle sales and construction management, smooth communication is ensured. 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 national qualified personnel, and we are confident in our construction techniques.
We can handle 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 any questions about the warranty, please click on the image above!

In the unlikely event that leaks are not resolved after the waterproofing work, we will take responsibility and address the issue!

Additionally, aftercare maintenance is available every year, and we will send you a DM notification for aftercare maintenance once a year. During aftercare maintenance, we will check the entire waterproofing and assess the 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 due to height, 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 repairs 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 project, which may cause troubles, so our company has a system in place to maintain the same representative.

6. Human Resource Development

To enhance skills, we create models of various buildings and conduct practical training. We regularly provide skill enhancement education so that each staff member can respond to 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 Midori-ku, Sagamihara補助金、助成金

Condominium Longevity Promotion Tax Reduction (Property Tax Reduction)

Requirements for Condominium Longevity Promotion Tax Reduction

Condominiums over 20 years old

Total number of units: 10 or more

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

Condominiums with a management plan certification or those that have developed or reviewed a long-term repair plan with advice and guidance from the municipality

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

Tax Reduction Details

Eligible: Property tax on the building portion imposed in the year following the completion of the work建物部分の固定資産税

Maximum Reduction: For each unitup to 100㎡ equivalent

Tax Reduction Rate: The tax amount within the above range is reduced by1/2 (50%)

Others

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

Considerations for waterproofing damage due to natural disasters include “holes in waterproof sheets caused by flying objects or falling debris due to wind disasters.”

If you are unsure whether it is covered by fire insurance, please feel free to contact us!

Contact page for Kakeru Koumuten Co., Ltd. is here!

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

• customer reviews

  

  Asao-ku, Kawasaki City | We received reviews about the ridge cap and rain gutter replacement work!

• customer reviews

  

  Kohoku-ku, Yokohama | We received reviews about the roof overlay (cover method)!

• customer reviews

  

  Kohoku-ku, Yokohama | We Received Reviews About Exterior Painting!

• customer reviews

  

  Aoba-ku, Yokohama | We received reviews about our exterior fence construction!

• customer reviews

  

  Tsurumi-ku, Yokohama | We received reviews about roof and exterior wall painting, as well as metalwork and rain gutter replacement work!

• customer reviews

  

  Higashiyamato City, Tokyo | We received reviews about exterior painting and roof overlay (cover method)!

Examples of Waterproofing Work

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 to 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 an estimate first.”

Timing for Waterproofing Work

Already Experiencing Leaks

If leaks have already occurred, it is necessary to address them promptly before the damage spreads.
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 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 accumulated 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, such as urethane or FRP waterproofing, it is recommended to apply surface protective agents (topcoats) approximately every 8 years.
We recommend regular inspections starting from 5 years after construction.

It is important to understand the type of existing waterproofing and perform appropriate maintenance.
If you are unsure about the type of waterproofing, please send us a photo via email or LINE inquiry, and we will assess it for you!

Types of Waterproofing Work

1. Urethane Waterproofing

Urethane waterproofing is a method of applying liquid polyurethane resin to the waterproofing surface in layers.
Before curing, it is in liquid form, allowing it to be applied even on complex shapes, and unlike sheet waterproofing, it can be installed without seams.
It can be widely applied to balconies, rooftops, and more.
For more details on the advantages and disadvantages of urethane waterproofing and maintenance methods, please refer to the article below.

For waterproofing work | Click here for information on urethane waterproofing!

2. Rubber Sheet Waterproofing

Rubber sheet waterproofing involves adhering synthetic rubber sheets to the surface to prevent water intrusion.
This method is commonly used for large areas such as rooftops.
One advantage is that it does not require waiting for drying, allowing for quicker installation, but it is not suitable for complex surfaces.
For more details on the advantages and disadvantages of rubber sheet waterproofing and maintenance methods, please refer to the article below.

For waterproofing work | Click here for information on rubber sheet waterproofing!

3. PVC Sheet Waterproofing

PVC sheet waterproofing consists of waterproof sheets made from 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. Although it is more expensive than rubber sheets and urethane waterproofing, its durability is a significant advantage.
For more details on the advantages and disadvantages of PVC sheet waterproofing and maintenance methods, please refer to the article below.

Waterproofing Work | Click here for information on PVC Sheet Waterproofing!

4. Long Sheet Waterproofing

Long sheet waterproofing, officially known as “slip-resistant vinyl floor sheet,” is commonly applied in areas where people walk, such as common areas and staircases in condominiums.
As the name suggests, it is slip-resistant and has high durability and abrasion resistance, making it suitable for walking areas.
Additionally, it comes in various designs, excelling in aesthetic appeal.
However, it tends to be more expensive, and since it does not overlap seams like rubber sheets or PVC sheet waterproofing, it may give a slightly lower impression of waterproofing performance.
It is rarely applied 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, preventing 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 and cost-effectiveness, it seems that about 80% of single-family home balconies utilize FRP waterproofing.
However, it is not suitable for application on large surface areas, making it unsuitable for rooftop installations.
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 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.
There are various methods of asphalt waterproofing, each with its own advantages and disadvantages, but a significant advantage is its high durability.

For detailed explanations on the advantages, disadvantages, and maintenance methods of asphalt waterproofing, please refer to the article below.

Waterproofing Work | Learn more about Asphalt Waterproofing Work here!

How to Choose a Waterproofing Contractor

There are many waterproofing contractors available in Midori-ku, Sagamihara.
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 I will explain 5 points to consider when requesting waterproofing work.

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”, as contractors cannot delete low ratings on their own, making it a trustworthy source of reviews.If there are many negative reviews or no reviews at all, it may be wise to refrain from making a request.

Check if there is aftercare maintenance and construction warranty

In case any construction defects or issues occur after the work, make sure to check if they provide a “construction warranty“!
Contractors who offer warranties are usually confident in their work, making them more trustworthy companies!

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

Additionally, to detect any issues early, confirm whether they will conduct thorough aftercare maintenance!
Since non-specialized contractors may not notice 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 the 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 the “types of materials used” and “construction methods” to compare the finer details!

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 customer requests are not fully communicated to the subcontractor, leading to troubles. By having one company handle everything from sales to construction, responsible waterproofing work can be done quickly and cost-effectively. Kakeru Koumuten handles everything from on-site surveys to actual construction in-house!

In the unlikely event that a leak or trouble occurs, a company that employs its own craftsmen can respond to and resolve issues quickly!

Carefully check the details, process, and materials used in the waterproofing estimate

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 optimal 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 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 installation location!

It is important to check in detail whether “is it the appropriate method for the substrate?” and “is it the appropriate material?” rather than judging solely by cost.

Therefore, 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 Midori-ku, Sagamihara, please contact Kakeru Koumuten Co., Ltd.

Our company has handled many waterproofing projects in Midori-ku, Sagamihara. Our greatest strength is that we can 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 every year, and we will strive to improve quality so that we can satisfy even more customers in the future.

We are happy to respond to small partial works as well!
In addition to waterproofing work, we can also carry out roofing work, exterior painting, and exterior renovations using the roof overlay (cover method) all in-house.

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

Characteristics of Midori-ku, Sagamihara

Midori-ku, Sagamihara, is located in the northwestern part of the city and is an area where rich natural environments and urban functions harmonize. It is blessed with beautiful waterfronts such as Sagami Lake and Tsukuiko Lake, as well as natural landscapes like Jinba Mountain and Fujino Satoyama, allowing you to enjoy seasonal scenery. Additionally, the Chuo Expressway and Ken-O Expressway run through the area, providing good access to the city center and Yamanashi, making it a popular base for leisure and tourism.

Furthermore, the area around Hashimoto Station is undergoing urban development, with large commercial facilities and public amenities being enhanced, creating a convenient living environment. It is also the planned site for the Linear Chuo Shinkansen, making it a region expected to develop further in the future.

Our company offers a wide range of exterior construction services in Midori-ku, Sagamihara City. We handle waterproofing, roof work, and exterior wall painting, among other services.
If you have any concerns, please feel free to consult with us!

Waterproofing Service Areas

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

Consultations via LINE are also very welcome◎

For roofing, guttering, and exterior work and repairs in Kanagawa, contact Kakerukoumuten Co., Ltd..

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!