Hello!
We are Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior painting, and exterior renovations located in Aoba-ku, Yokohama, Kanagawa Prefecture!
This is a case study of an exterior renovation in Nakahara-ku, Kawasaki.
There are several types of exterior renovations, and this time, the work involved a roof overlay using Super Galtect!
We implemented measures against leaks through the roofing work!
Thank you very much for choosing Kakeru Koumuten Co., Ltd.
Roof Overlay Construction Procedure
1. Demolition of existing roof ridge

2. Laying of roofing (waterproof sheet)
3. Fabrication of accessories (decorative patterns and eaves)
4. Main construction work

5. Ridge cap and wall edge rain guard processing

What is the Roof Overlay (Cover Method)?
The roof overlay method involves leaving the current roof almost intact and placing a new roof on top of it, effectively covering it.
Literally, it is a method of covering a roof with another roof. Therefore, the roof becomes double-layered. Since the roof is laid over itself, it is also referred to as “overlapping roofing.”
Advantages of the Overlay Method
Since a “new roof” is placed over the “current roof,” demolition work is almost unnecessary, meaning that very little waste is generated.
This is its most significant feature, leading to various advantages.
The only parts that require demolition and waste disposal are the ridge caps, so compared to complete roof replacement, it is more cost-effective.
In 2004, regulations regarding the concentration of asbestos in raw materials were changed (for details, please refer to the Ministry of Health, Labour and Welfare website).
Some building materials used in structures built before 2004 contain asbestos. Asbestos-containing materials are difficult to demolish due to their high environmental impact, and the costs for demolition and waste disposal are also high. The overlay method, which generates almost no waste, is ideal for such roofs.
Some may wonder, “Is it safe to live in a building that uses asbestos-containing materials?” but rest assured. As long as there is no destruction or crushing, it will not disperse into the air.
If you are unsure about the type of roof on your home, please feel free to consult us.
Additionally, it can be completed in a shorter time frame than painting or complete roof replacement. A shorter construction period means lower labor costs, which in turn makes the costs more affordable.
The psychological anxiety of having to live in an unusual environment is also reduced.
When scaffolding is set up, there may be inconveniences such as difficulty in entering and exiting or opening windows. Being able to return to normal life in a short period is a significant advantage.
Our company specializes in roofing work, and the roof overlay method is the most frequently performed type of work we do. We are very grateful that we are continuously engaged in roof overlay method projects without interruption.
About Roofing Materials
The roofing material used is the Super Galtect from Aijii Industry.
The Super Galtect comes with a manufacturer warranty of 15 years for the coating and 25 years for perforation.
Our company also provides a construction warranty of 10 years!
Made of SGL steel plate, it is resistant to rust.
Insulation material is tightly applied from edge to edge of the roofing material, creating a metal sheet that integrates the steel plate and insulation.
When installed, insulation is applied even to the parts where the roofing materials overlap, and the surface is coated with a high heat-reflective paint, allowing for a cool summer and a warm winter.
Additionally, it has soundproofing properties, reducing the sound of rain.
Moreover, it is lightweight compared to other roofing materials, which reduces the sway during earthquakes, making it a good earthquake countermeasure.
It excels in finish, durability, insulation, soundproofing, and wind resistance, and the Super Galtect from Aijii Industry is the most frequently used in our construction achievements and is receiving considerable attention!
Colors
■ Shade Black

■ Shade Brown

■ Shade Blue

■ Shade Moss Green

■ Shade Charcoal

■New Color Shade Wine Red

You can choose from 6 colors!
This time, the cover work was completed beautifully in Shade Moss Green!
The customer was very satisfied, and I was also very happy!
Thank you very much!
Please check out other roofing work examples here!
For roof renovations in Nakahara-ku, Kawasaki, trust Kakeru Koumuten!
Our company has extensive experience in roof renovations in Nakahara-ku, Kawasaki.
We are happy to assist with roof overlay work, roof replacement, and partial roof repairs such as leak repairs.
If you have any questions like “I just want to know the estimate for a roof renovation” or “I want to know about roofing materials,” please feel free to contact us!
Community-Focused Service
As an exterior renovation company based in Aoba-ku, Yokohama, we have handled many roof renovations in nearby Nakahara-ku, deeply understanding the needs of local customers.
“I want it to last long with just one renovation”
“I want to keep costs as low as possible”
“I want to improve insulation performance because the indoors are hot”
We provide optimal solutions for specific requests like these.
Additionally, we can visit for aftercare maintenance every year!
We send out aftercare maintenance DM every year!
List of Areas in Nakahara-ku, Kawasaki
Ida, Nakahara-ku / Ida Sanbai-cho, Nakahara-ku / Ida Sugiyama-cho, Nakahara-ku / Ida Nakano-cho, Nakahara-ku / Ichinotsubo, Nakahara-ku / Imai Uemachi, Nakahara-ku / Imai Nakacho, Nakahara-ku / Imai Nishimachi, Nakahara-ku / Imai Minamimachi, Nakahara-ku / Okura-cho, Nakahara-ku / Kamikodatanaka, Nakahara-ku / Kamishinjo, Nakahara-ku / Kamihirama, Nakahara-ku / Kamimaruko, Nakahara-ku / Kamimaruko Sannou-cho, Nakahara-ku / Kamimaruko Tenjin-cho, Nakahara-ku / Kamimaruko Hachiman-cho, Nakahara-ku / Karishuku, Nakahara-ku / Kitaya-cho, Nakahara-ku / Kizuki, Nakahara-ku / Kizuki Ise-cho, Nakahara-ku / Kizuki Gion-cho, Nakahara-ku / Kizuki Sumiyoshi-cho, Nakahara-ku / Kizuki Omachi, Nakahara-ku / Kosugi, Nakahara-ku / Kosugi Goten-cho, Nakahara-ku / Kosugi Jinya-cho, Nakahara-ku / Kosugi-cho, Nakahara-ku / Shimokodatanaka, Nakahara-ku / Shimoshinjo, Nakahara-ku / Shimonumabe, Nakahara-ku / Shinjo, Nakahara-ku / Shinjo Nakacho, Nakahara-ku / Shinmaruko Higashi, Nakahara-ku / Shinmaruko-cho, Nakahara-ku / Tajiri-cho, Nakahara-ku / Todoroki, Nakahara-ku / Nakamaruko, Nakahara-ku / Nishikase, Nakahara-ku / Maruko-dori, Nakahara-ku / Miyauchi, Nakahara-ku
Conclusion
Estimates and inspections are, of course, free! If you have any concerns regarding roofs, rain gutters, exterior walls, or exteriors, please consult Kakeru Koumuten Co., Ltd. in Aoba-ku, Yokohama!
Kakeru Koumuten Co., Ltd. is a remodeling company strong in exterior renovations, and we carry out everything from temporary scaffolding work to roof work and exterior painting completely in-house.
When it comes to exterior renovation work, we are confident that we will not be outdone by other companies in terms of “cost, quality, and efficiency”!
We are confident in our exterior renovations, so we welcome competitive estimates!
We offer comprehensive construction guarantees and aftercare maintenance, and we have received positive feedback for our appropriate proposals that match our customers’ future life plans and cost performance!
“I’m glad I asked them!” is what we aim for, and we take every request we receive seriously.
We also have information on roof construction costs and pricing plans for the roof overlay (cover method), so please take a look if you are interested!
We look forward to your inquiries. Thank you very much.
Helpful information about exterior renovations can be found here!
・Nakahara Ward, Kawasaki City | Roof Cover | We repaired the roof with Super Galtect!
・Nakahara Ward, Kawasaki City | Roof Cover and Exterior Painting | We repaired the roof with Ridgeway!
・Aso Ward, Kawasaki City | Roof Cover | We removed the skylight and repaired the roof with Ridgeway!
・Summary of popular exterior wall painting colors! We will introduce recommended color combinations!
・DIY Painting Plan! A must-see for those who want to try DIY roof and exterior wall painting! We will only set up the scaffolding!
・About the costs of roof overlay | Kakeru Koumuten’s roof construction plan!
・About the costs of exterior wall painting | Kakeru Koumuten’s exterior wall painting plan!
・About the costs of leak repairs | Kakeru Koumuten’s leak repair plan!
・About the costs of ridge cap replacement and surface plaster | Kakeru Koumuten’s construction plan!
・Latest information | Subsidies and grants available for renovations, and reduction systems!
・What are the market prices for rain gutter repair and cleaning? Tips on timing, fire insurance, and choosing contractors!
・Renovation store in Kanagawa Prefecture, Yokohama | What is roof overlay (roof cover method)?
LINE consultations are also very welcome◎
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!


