If you’re looking for a roof repair contractor in Aoba-ku, Yokohama, come to Kakeru Koumuten Co., Ltd.
Kakeru Koumuten Co., Ltd. is a company specializing in roof repairs and leak repairs.
We have handled numerous leak and roof repairs in Aoba-ku.
If you are considering a roof renovation, please feel free to consult with Kakeru Koumuten Co., Ltd.!
We respond widely to sudden leaks after typhoons and roof repairs based on the age of the building.
If you are in need in Aoba-ku, Yokohama, we can respond as soon as the same day, so please feel free to contact us.
How to Choose a Leak Repair Contractor
There are many contractors in Yokohama that perform leak repairs, so you may be unsure which contractor to choose when requesting a leak repair.
Therefore, we recommend confirming the following 4 points when requesting roof repairs and leak repairs.
● Have extensive experience in roof repairs and leak repairs
● Check for warranties and aftercare services
● Obtain estimates from multiple contractors (at least 3)
● Confirm whether they conduct leak investigations and roof repairs in-house
By confirming the above 4 points, you will be able to choose a contractor that will respond properly.
Extensive Experience in Roof Repairs and Leak Repairs
Roof repair contractors often have websites that showcase their construction achievements.
The construction results may explain the following items, so let’s check if similar repairs have been done for your home.
Repair details,the process leading to the repair,materials used,repair costs,repair duration, etc.
Additionally, if the repair details are explained in detail with photos, it provides peace of mind as it can serve as a reference when you actually request repairs.
If you are concerned about whether the contractor you are about to hire will respond properly, choose a contractor with extensive repair experience.
Kakeru Koumuten Co., Ltd. specializes in roof and exterior repairs, and we receive many requests for leak repairs.
Kakeru Koumuten’sroof repair case studies in Asahi-ku, Yokohama
| Construction Location |
| Aoba-ku, Yokohama |
| Construction Details |
| Temporary Scaffolding Installation Roof Overlay (Cover Method) |
| Existing Substrate / Materials Used |
| 〇Roof ・Existing Roofing Material:Slate Roof Colonial NEO (Non-Asbestos) ・New Roofing Material:Aijii Industry/Super Galtect (Color: Shade Brown) Durability: Approximately 35 years Manufacturer Warranty: Coating 15 years, Rust 20 years, Puncture 25 years ・New Roofing Sheet:Tajima Roofing/Tadis Self Cover Durability: Approximately 30 years This is a roofing sheet specifically for non-asbestos cover methods. ・New Ridge Substrate and Rain Stop Substrate:Galvalume Steel Durability: Approximately 30 to 35 years ・New Sealing Material:Oton Exceed Durability: Approximately 30 years Applied to areas requiring sealing, such as the ridge cap and the wall edges of the rain stop flashing. ・Fasteners for Sheet Metal:Stainless Steel Screws with Washers |
| Price Range |
| 600,000 to 700,000 yen |
| Construction Period |
| Approximately 5 days |
| Completion Month |
| August 2024 |
| Inquiry Details |
| We received an inquiry from a customer living in Aoba-ku, Yokohama: “There were roof fragments on my balcony, so I would like to request a quote for roof repair. However, considering the age of the building, I think it’s about time to repair the entire roof, so I would appreciate a quote for the overall roof repair.” |
Our Proposal
The existing roofing material is “Colonial NEO,” which cannot be painted.
The reason it cannot be painted is that it is very prone to cracking, and even if painted, cracks and breaks will occur soon after, making painting meaningless; thus, it is deemed not suitable for painting.
This roofing material is now discontinued.
Repairing a Colonial NEO roof is effective through overall roof overlay (cover method) or complete roof replacement.
This time, since the underlying structure was solid and the customer wanted to keep costs as low as possible, we proposed the roof overlay method!
We explained the advantages and disadvantages of each roofing material, and the customer chose to proceed with the highly durable and insulated “Super Galtect” for the project.
When performing a cover method on fragile slate like Colonial NEO, standard roofing sheets cannot be used, so we utilized the specialized roofing sheet “Tadis Self Cover.”
Check for warranties and aftercare services
When selecting a leak repair contractor, make sure to check for warranties.
Leak repairs can recur even after being fixed once, so if you have to request repairs every time a leak reoccurs, it can lead to significant expenses.
For this reason, if you choose a contractor that offers a warranty period, repairs may be done for free within that period.
The warranty period varies by contractor and the nature of the work, but it typically ranges from 1 to 10 years.
Emergency repairs or partial fixes often cannot come with a leak warranty.
Additionally, some contractors provide aftercare services separate from warranties, so be sure to check if the contractor you are considering has warranties and aftercare services.
Kakeru Koumuten Co., Ltd. guarantees a leak warranty for both roof overlay and roof replacement work.
Similarly, for exterior walls, a leak warranty is guaranteed for exterior wall overlay and replacement work, as well as for joint sealing work.
Regarding aftercare, we send out annual direct mail, making aftercare possible every year.
Obtain estimates from multiple contractors (at least three)
When requesting roof renovations or leak repairs, be sure to get estimates from multiple contractors.
Even for the same repair work, costs may vary between contractors, as well as warranties and aftercare services.
Additionally, obtaining multiple estimates makes price negotiations easier. To request services at the lowest possible cost, obtaining estimates from several contractors is essential.
Therefore, while it’s understandable to feel rushed when a leak occurs, first perform emergency measures and calmly consider the work details to ensure you won’t have regrets about the project!
Kakeru Koumuten is happy to assist with requests for emergency leak measures only!
Confirming Whether Rain Leak Investigations and Roof Repairs Are Conducted In-House
Rain leaks can sometimes be easily identified, while in other cases, pinpointing the source of the leak can be quite challenging, requiring knowledge and experience.
If a contractor completely outsources roof repairs and rain leak repairs to subcontractors, they may lack the necessary knowledge and experience, leading to suggestions for repairs in the wrong areas or ineffective rain leak repairs.
Additionally, having to investigate and then request a subcontractor adds extra time and costs.
By having the knowledge and experience to conduct the work in-house, we can provide prompt and cost-effective responsible rain leak repairs.
Kakeru Koumuten Co., Ltd. conducts everything from rain leak investigations to actual construction in-house!
About the Costs of Rain Leak Repair
The table below shows the average costs for repairs in areas prone to rain leaks.
|
Repair Details |
Average Cost |
|
Partial Replacement of Roofing Material |
¥10,000 – ¥20,000 |
|
Roof Replacement (Re-roofing) |
From ¥500,000 |
|
Roof Overlay (Cover Method) |
From ¥400,000 |
|
Replacement/Repair of Roof Ridge Flashing |
From ¥10,000 |
|
Skylight Repair |
From ¥10,000 |
|
From 10,000 yen |
|
|
Cap flashing repairs |
From 10,000 yen |
|
Waterproofing work for balconies and rooftops |
From 80,000 yen |
For detailed pricing, click here!!
For exterior renovations in Aoba-ku, Yokohama, click here!
For exterior wall painting in Aoba-ku, Yokohama, click here!!
For roof renovations in Aoba-ku, Yokohama, click here!
For exterior wall overlay work in Aoba-ku, Yokohama, click here!
About Kakeru Koumuten
Kakeru Koumuten Co., Ltd. is a remodeling company based in Aoba-ku, Yokohama, Kanagawa Prefecture, specializing in roofing, painting, and scaffolding work with complete in-house construction for exterior renovations.
By assembling our own temporary scaffolding, we can perform roof repairs quickly and cost-effectively, allowing for prompt leak repairs.
Company Introduction


● We store scaffolding materials!
Since we can set up temporary scaffolding in-house, we can quickly repair roofs.


● We store materials and tools related to roofing and painting work!
We have all the necessary components for leak repairs, allowing us to respond quickly!
Customer Reviews
Service Areas
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo.
Contact page for Kakeru Koumuten Co., Ltd. is here!
List of Areas in Aoba-ku, Yokohama
Iizawa-cho, Aoba-ku / Imagawa-cho, Aoba-ku / Imajuku, Aoba-ku / Imajuku-machi, Aoba-ku / Imajuku-nishimachi, Aoba-ku / Imajuku-higashimachi, Aoba-ku / Imajuku-minamimachi, Aoba-ku / Oike-cho, Aoba-ku / Odaka-cho, Aoba-ku / Kashiwamachi, Aoba-ku / Kanagatani, Aoba-ku / Kamikawaicho, Aoba-ku / Kamishirane, Aoba-ku / Kamishirane-machi, Aoba-ku / Kawaijuku-machi, Aoba-ku / Kawaihonmachi, Aoba-ku / Kawashima-cho, Aoba-ku / Kirigasaku, Aoba-ku / Sakonyama, Aoba-ku / Sasanodai, Aoba-ku / Sachigaoka, Aoba-ku / Santanda-machi, Aoba-ku / Shikibidai, Aoba-ku / Shimokawaicho, Aoba-ku / Shirane, Aoba-ku / Shirane-machi, Aoba-ku / Zenbu-machi, Aoba-ku / Toyoka-cho, Aoba-ku / Tsurugamine, Aoba-ku / Tsurugamine-honmachi, Aoba-ku / Nakao, Aoba-ku / Nakahopegaoka, Aoba-ku / Nakazawa, Aoba-ku / Nakashirane, Aoba-ku / Nishikawajima-cho, Aoba-ku / Higashikopegaoka, Aoba-ku / Futamatagawa, Aoba-ku / Honjuku-machi, Aoba-ku / Honmura-cho, Aoba-ku / Mankigahara, Aoba-ku / Minamihopegaoka, Aoba-ku / Minamihonjuku-machi, Aoba-ku / Yasashicho, Aoba-ku / Wakabadai, Aoba-ku
Subsidies and Grants Available for Leak Repairs in Aoba-ku, Yokohama
In Aoba-ku, Yokohama, the following subsidies may be available for leak repairs. For details, please contact our company or your local government. (As of February 2025)
This program aims to create a safe city resilient to earthquakes by conducting “seismic diagnosis” of wooden individual houses in Yokohama. The mayor dispatches certified “wooden house seismic diagnosticians” to residents who wish to have a seismic diagnosis, supporting citizens’ seismic measures.

https://www.city.yokohama.lg.jp/business/bunyabetsu/kenchiku/bosai/taishin/hojokinshienseido/mokutai/taishin/mokushindan.html
Aoba-ku, Yokohama’s Wooden House Earthquake Resistance Renovation Promotion Project is a system where the city subsidizes part of the costs for earthquake resistance renovation work on wooden private houses.
About the Wooden House Earthquake Resistance Renovation Subsidy System in Aoba-ku, Yokohama
https://www.city.yokohama.lg.jp/business/bunyabetsu/kenchiku/bosai/taishin/hojokinshienseido/mokutai/mokukaishu/mokukaishu.html
Features of Aoba-ku, Yokohama
Aoba-ku, Yokohama is an area characterized by its rich natural environment and convenient transportation access. It boasts many parks and green spaces, including Japan’s largest “Yokohama Zoo Zoorasia” and one of the largest areas in Yokohama, “Children’s Nature Park,” providing plenty of relaxing spots. Additionally, residential areas are well-developed, making it a comfortable place to live.
Aoba-ku, Yokohama has the lowest average summer temperature in Yokohama City, which is attributed to its inland location, resulting in strong cooling in the mornings and evenings, along with green spaces surrounding the area that mitigate the heat island effect.
Famous stations in Aoba-ku, Yokohama include,
・Futamatagawa Station
A major station on the Sotetsu Line and the central station of Aoba-ku. It offers convenient access to Yokohama Station and Shinjuku, with plenty of shopping malls and facilities in the vicinity.
・Tsurugamine Station
A station on the Sotetsu Line, surrounded by residential areas and commercial facilities. It is a major station alongside Futamatagawa Station and serves as a transportation hub for the region.
Our company handles many roofing projects in nearby Aoba-ku, Yokohama.
We are happy to assist with partial roof repairs such as roof overlay work, roof replacement, and leak repairs, as well as other repairs! Please feel free to consult us for any sudden troubles!
Summary
Our company handles many roofing projects in Aoba-ku, Yokohama.
We are happy to assist with partial roof repairs such as roof overlay work, roof replacement, and leak repairs, as well as other repairs!
“I just need a temporary fix for the leak”
“I want to repair my broken roof”
“I want to implement overall leak prevention measures for the building”
We provide optimal solutions for specific requests like these.
Estimates and inspections are, of course, free!
From temporary scaffolding work to roofing and exterior painting, we carry out all work in-house.
We are confident that our costs, quality, and efficiency in exterior work are unmatched compared to other companies!
We welcome competitive estimates!
We look forward to your inquiries. Thank you very much.
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!




