目次
- 1 Construction Data for Izumi-ku, Yokohama
- 2 Roof Overlay (Cover Method) Construction Procedure
- 2.1 1. Demolition of Existing Ridge and Snow Stops
- 2.2 2. Roofing Installation (Waterproof Sheet) &Accessory Processing (Karakusa, Keraba, Valley)
- 2.3 3.Main Construction (Aijii Industry/Super Galtect)
- 2.4 4.Ridge Cap Processing and Sealing at Various Locations
- 2.5 5. Cleaning
- 2.6 About Roofing Materials
- 3 Leave Your Roofing Work in Izumi-ku, Yokohama to Kakeru Koumuten!
Construction Data for Izumi-ku, Yokohama
| Construction Location |
| Aoba-ku, Yokohama |
| Work Details |
| Temporary Scaffolding Installation Roof Overlay (Cover Method) |
| Existing Materials |
| Roof Material: Slate |
| New Materials Used |
|
Roof Material: Aijii Industry / Super Galtect Sealing material: Auto Chemical Industry / Auton Exceed |
| Price Range |
| 800,000 – 900,000 |
| Construction Period |
| Approximately 5 days |
| Completion Month |
| June 2025 |
| Inquiry Details |
|
We received an inquiry from a customer residing in Aoba-ku, Yokohama, stating, “I am looking for a contractor who can respond as quickly as possible with competitive estimates and provide good proposals.” Our proposal details |
Roof Overlay (Cover Method) Construction Procedure
1. Demolition of Existing Ridge and Snow Stops

The existing ridge base is made of cedar, which has a durability of about 10 to 15 years.
Exceeding the durability period can lead to corrosion and discoloration, resulting in the ridge cap coming loose or being blown away.
2. Roofing Installation (Waterproof Sheet) &Accessory Processing (Karakusa, Keraba, Valley)

We will firmly adhere this to prevent it from being blown away by the wind. Since there are various durability periods and characteristics for roofing sheets, it is important to choose a roofing sheet that matches the durability of the new roofing material and the roof slope!
3.Main Construction (Aijii Industry/Super Galtect)

The roofing material will be secured with stainless steel renovation screws!
At the ridge, we will install the necessary ridge base to secure the ridge cap. The boards we handle come in three types: cedar, resin, and Galvalume steel, and this time we used Galvalume steel.
Galvalume steel is expected to have three times the durability of cedar, and unlike resin or cedar, it does not crack, providing peace of mind!
Our original integrated waste board Galvalume steel ridge base is highly durable, has strong fixing power, and excellent wind resistance! Even if rainwater enters from the ridge, it is designed to discharge rainwater to the outside, demonstrating high waterproofing performance!
4.Ridge Cap Processing and Sealing at Various Locations
The screws used for fixing are rust-resistant stainless steel screws with washers!
Packings with screws are less likely to come out compared to nails, securely fixing the ridge flashing to the underlying board!
Although it is not visible after installation, adding a face plate inside the ridge flashing enhances waterproofing! It firmly protects the ridge, which is a critical part of the roof.
5. Cleaning
About Roofing Materials
The roofing material used is Aijii Industrial’s Super Galtect. Super Galtect comes with a 15-year paint warranty and a 25-year hole warranty, and we also provide a 10-year construction warranty!
Made of SGL steel plate, it is resistant to rust. Insulation material is thoroughly applied from edge to edge of the roofing material, creating a metal plate 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 lighter 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 our company’s construction results show that Aijii Industrial’s Super Galtect is the most popular and highly regarded!
Color
■Shade Black

■Shade Brown

■Shade Blue

■Shade Moss Green

■Shade Charcoal

■New Color Shade Wine Red

You can choose from the 6 colors above!
This time, we completed a cover project using Shade Black, and it turned out very well! The customer was extremely satisfied, and I was very happy as well. Thank you!
Please check out other roof overlay (cover method) project results from here!
| Roof Material |
|
|---|---|
| Roof Material Color |
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Leave Your Roofing Work in Izumi-ku, Yokohama to Kakeru Koumuten!
Our company is based in Aoba-ku, Yokohama, so we have numerous construction achievements in Izumi-ku, Yokohama. We are happy to assist with roof overlay work, roof replacement work, and even partial roof repairs such as leak repairs.
“I just want to know the estimate for a roof renovation,” “I want to know about roofing materials”, if you have any questions or concerns, please feel free to contact us!
Exterior Renovation Service Areas
Kakeru Koumuten accepts requests throughout Kanagawa Prefecture and Tokyo.
List of Areas in Izumi-ku, Yokohama
Izumi-ku Ikenotani / Izumi-ku Izumigaoka / Izumi-ku Izumi Chuo Kita / Izumi-ku Izumi Chuo Minami / Izumi-ku Izumimachi / Izumi-ku Okazumicho / Izumi-ku Katsurazaka / Izumi-ku Kamiiida-cho / Izumi-ku Shimo-iida-cho / Izumi-ku Shimo-izumi / Izumi-ku Shirayuri / Izumi-ku Shinbashicho / Izumi-ku Nakada Kita / Izumi-ku Nakada-cho / Izumi-ku Nakada Nishi / Izumi-ku Nakada Higashi / Izumi-ku Nakada Minami / Izumi-ku Nishigaoka / Izumi-ku Yayoi-dai / Izumi-ku Ryoke / Izumi-ku Ryokuen
Long-Term Reliability
All the roofing materials we use come from reliable products that offer long-term warranties. For example, the Super Galtect we used this time comes with a 15-year paint film warranty and a 25-year hole warranty. Additionally, we provide a 10-year construction warranty! This means you can use it with peace of mind for a long time after just one renovation.
While Super Galtect is an excellent roofing material known for its durability, we also offer roofing materials with even higher durability and better insulation properties.
Summary
This concludes our roofing overlay (cover method) construction achievements in Aoba-ku, Yokohama.
Roof renovations depend on the existing condition and roofing materials, so it is essential to confirm that the proposed roofing materials align with what the customer is looking for.
At Kakeru Koumuten Co., Ltd.,estimates and inspections are, of course, free.
If you have any concerns regarding exterior renovations such as roofs, rain gutters, walls, or exteriors, please feel free to consult us!
From temporary scaffolding work to roofing and exterior painting, we handle everything in-house! We are confident that when it comes to exterior renovation work, we will not be outdone by other companies in terms of “cost, quality, and efficiency”!
We are confident in our construction content and costs, so we welcome competitive estimates as well!
With robust construction warranties and aftercare maintenance, we have received positive feedback for our cost performance and appropriate proposals that align with our customers’ future life plans.
We are committed to ensuring that all our customers feel “I’m glad I chose Kakeru Koumuten!” by taking every request seriously.
We look forward to your inquiries! Thank you very much.
・[Aoba-ku, Yokohama] | Foundation Repair | We performed foundation mortar repair and painting!
・[Aoba-ku, Yokohama] | Exterior Painting | We carried out exterior painting and joint sealing work using Perfect Top!
・[Aoba-ku, Yokohama] | Rain Gutter Cleaning | We cleaned the trash and moss packed in the rain gutter for a total of 5,000 yen!
・For exterior renovations in Aoba-ku, Yokohama, trust Kakeru Koumuten Co., Ltd.!
・For roof renovations in Aoba-ku, Yokohama, trust Kakeru Koumuten Co., Ltd.!
・For waterproofing work in Aoba-ku, Yokohama, trust Kakeru Koumuten Co., Ltd.!
・For solar panel installation work in Aoba-ku, Yokohama, trust Kakeru Koumuten Co., Ltd.!
・For rain gutter repair and cleaning in Aoba-ku, Yokohama, trust Kakeru Koumuten Co., Ltd.!
・For exterior cleaning in Aoba-ku, Yokohama, trust Kakeru Koumuten Co., Ltd.!
・For leak repairs in Aoba-ku, Yokohama, trust Kakeru Koumuten Co., Ltd.!
・For exterior cover work in Aoba-ku, Yokohama, trust Kakeru Koumuten Co., Ltd.!
・After maintenance by Kakeru Koumuten Co., Ltd.
・Construction menu and price list of Kakeru Koumuten Co., Ltd.
・Kakeru Koumuten Co., Ltd. Staff Blog & Announcements
◎We welcome consultations via LINE!◎
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!





