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 project in Kanagawa-ku, Yokohama.
For this roofing renovation, we performed a roof overlay (cover method) using Super Galttect!
The roof overlay involves dismantling and removing the existing roofing materials and replacing them with new roofing to prevent leaks.
Thank you very much for choosing Kakeru Koumuten Co., Ltd. from among many contractors.
Kanagawa-ku, Yokohama, Mr. K’s House – Construction Data
| Construction Location |
| Aoba-ku, Yokohama |
| Construction Details |
| ・Temporary scaffolding installation・Roof replacement work |
| Existing Base |
| Roof: Tile |
| New Materials Used |
| Roof: Super Galtect |
| Price Range |
| 1,000,000 – 1,500,000 |
| Construction Period |
| 17 days |
| Completion Month |
| January 2024 |
Roof Replacement Construction Procedure
1. Dismantling Existing Roofing Materials

2. Installing New Sheathing

3. Installing Roofing (Waterproof Sheet)
This underlayment material boasts the highest quality, excelling in both waterproofing and durability, leaving others behind. By sandwiching the modified asphalt layer between non-woven fabric and base paper, it fully demonstrates the performance of the modified asphalt.
The expected durability is approximately 30 years!
4. Fabricating Accessories (Curlicue & Eaves)

The components used are made of SGL steel plate.
5. Main Construction (Aijii Industry/Super Galtect)
Once the installation reaches the ridge, we will install necessary materials called “nuki-bari” to secure the ridge cap. There are types of nuki-bari made of cedar and resin, and this time we used the resin type!
The resin type is expected to have twice the durability compared to the cedar type!
6. Ridge Cap Processing and Sealing

At the wall edge, we will process and install a component called “ameosae-bakin” (rainwater guard).
We will use stainless steel nails and screws that are resistant to rust for securing!
7. Cleaning

Procedure for Kiryoke (Eave) Metal Work
1. Demolition of Existing Kiryoke
2. New Roof Sheathing and Preservative
3. Roofing Installation (Waterproof Sheet)
It is made of a delayed adhesive modified asphalt roofing material, which is said to have double the durability of regular asphalt roofing.
As a primary waterproofing measure, if the roofing is properly installed, there will be no leaks!
We will ensure it is securely attached to prevent it from blowing away.
4. Custom Fabrication
5. Sealing
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.
We also provide a 10-year construction warranty!
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 plate that integrates steel 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 commonly 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 done in Black, and it turned out very well!
The customer was very satisfied, and I was also very happy!
Thank you very much!
Please check out other roofing work examples from here!
| Roof Material |
|
|---|---|
| Manufacturer Warranty | Coating 15 years, Red Rust 20 years, Hole 25 years |
| Expected Durability | About 40 years |
| Color Used This Time |
Shade Black
|
For roof renovations in Kanagawa-ku, Yokohama, trust Kakeru Koumuten!
Our company is based in Yokohama, and we have extensive experience in roof renovations in Kanagawa-ku, Yokohama.
We are happy to assist with roof overlay work, roof replacement, and partial roof repairs such as leak repairs.
If you have any questions or concerns, such as “I just want to know the estimate for roof renovation” or “I want to know about roofing materials,” please feel free to contact us!
Community-Focused Services
We are an exterior renovation company based in Aoba-ku, Yokohama, and we have handled many roof renovations in Yokohama, deeply understanding the needs of our local customers.
“I want it to last a long time 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 to specific requests like these.
Long-Term Reliability
All 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 coating warranty and a 25-year hole warranty from the manufacturer. We also provide a 10-year construction warranty, so you can use it with peace of mind for a long time after just one renovation.
Galtect is a lightweight roofing material that excels in durability and cost performance, but we also offer roofing materials with even higher durability and better insulation properties.
Summary
We have a wealth of experience in roof renovations in Kanagawa-ku.
We are happy to assist with partial roof repairs such as roof overlay work, roof replacement work, and leak repairs.
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 is a renovation company strong in exterior renovations, and we carry out complete in-house construction from temporary scaffolding to roofing and exterior painting.
We are confident that our “cost, quality, and efficiency” in exterior renovation work are unmatched compared to other companies!
We are confident in our exterior renovations, so we welcome competitive estimates!
We offer robust construction warranties and aftercare maintenance, and we have received positive feedback for our appropriate proposals that match cost performance and our customers’ future life plans!
“I’m glad I asked for this!” We take every request seriously to ensure you feel this way.
We also have information on roofing costs and pricing plans for the roof overlay method, so please take a look if you’re interested!
We look forward to your inquiries. Thank you very much.
Helpful information about exterior renovations can be found here!
・Aoba-ku, Yokohama | Roof Overlay | We performed the roof overlay method using Super Galtect!
・Aoba-ku, Yokohama | We conducted exterior wall painting using premium silicone!
・Aoba-ku, Yokohama | Kakeru Koumuten | Roof inspection using a drone!
・Painting DIY Plan! A must-see for those who want to try DIY roof and exterior wall painting! We will only set up the scaffolding!
・What is the cost range for roof remodeling? Types of construction and how to choose a contractor, etc.
・Latest! Grants and subsidies available for renovations, and reduction systems!
・How much does it cost for roof work? We will introduce the cost range!
・About the cost of roof overlay | Kakeru Koumuten’s roof construction plan!
・Renovation store in Kanagawa Prefecture, Yokohama | What is roof layering (roof overlay 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!



