



Hello!
I am Yamanaka from 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 a roof renovation project in Yokohama, Kanagawa Prefecture.
The work involved a roof overlay (cover method) (Super Galtect) project!
We implemented leak prevention measures through the roof overlay work!
Thank you very much for choosing Kakeru Koumuten Co., Ltd. from among many contractors.
Roof Overlay Construction Procedure
1. Dismantling Existing Ridge and Snow Guards
We dismantle only the ridge flashing and snow guards that would obstruct the overlay work.

2. Laying Roofing (Waterproof Sheet)
The roofing material used this time is modified asphalt. You can expect double the durability of asphalt roofing!

3. Component Processing (Curlicue & Eaves)
We will process and install the eaves and curlicue.

4. Main Construction
Once the main body is roofed, we will install the ridge and wall plates. This time, we used cedar ridge boards, but there are also resin ridge boards that are resistant to corrosion.
5. Ridge Metal Processing
We will process and install the ridge metal and ventilation ridge. We will firmly apply sealing on the inside of the joints.
For the wall edge, we will process and install a component called a rain stop metal.


6. Cleaning
We will remove any footprints and debris that may have fallen around the house and in the rain gutters, and we will do a thorough cleaning.
We strive to ensure that the area is cleaner after the work than it was before!
And that concludes the construction!
About the Roofing Material Used
The roofing material used is the Super Galtect from Aijii Industrial.
The Super Galtect comes with a 15-year paint warranty and a 25-year hole warranty from the manufacturer.
We also provide a 10-year construction warranty!
Additionally, it is made of SGL steel plate, which is resistant to rust.
Insulation material is tightly applied from end to end 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.
Moreover, it has soundproofing properties, reducing the sound of rain.
Being lighter than other roofing materials, it also reduces the sway during earthquakes, making it a good earthquake countermeasure.
It excels in finish, durability, insulation, soundproofing, and wind resistance, and among our construction achievements, the Super Galtect from Aijii Industrial is the most popular and highly regarded!
Color
■Shade Black

■Shade Brown

■Shade Blue

■Shade Moss Green

■Shade Charcoal

■Shade Wine Red

You can choose from these 6 colors!
This time, the cover work with Shade Blue turned out exceptionally well!
The customer was very satisfied, and I was also very happy!
Thank you very much!
Please check out other roofing work achievements here!
What is the Roof Overlay (Cover Method)?
The roof overlay method involves leaving the current roof almost as it is 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 on top of another, it is also referred to as “overlapping roofing.”
Advantages of the Overlay Method
“Since we overlay “new roofs” on the “current roof,” demolition work is almost unnecessary, meaning that very little waste is generated.
This is the biggest feature and leads to various benefits.
The only part that requires demolition and waste disposal is the ridge cap, so compared to complete roof replacement, the costs are lower.
In 2004, regulations regarding the concentration of asbestos in raw materials were changed (for more details, please see the Ministry of Health, Labour and Welfare website below).
Building materials used in structures constructed before 2004 may 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 roof 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 consult us.
Additionally, we can complete the work in a shorter period than painting or complete roof replacement. A shorter construction period means lower labor costs, which in turn reduces expenses.
The psychological anxiety of having to live in an unusual environment is also minimized.
When scaffolding is set up, you may experience inconveniences such as difficulty entering and exiting or opening windows. Being able to return to your normal life in a short period is a significant advantage.
Our company specializes in roofing work, but the roof overlay method is the most frequently performed type of work we undertake. We are very grateful that we are continuously able to carry out roof overlay projects without interruption.
| Roof Material |
|
|---|---|
| Manufacturer Warranty | Coating 15 years, Red rust 20 years, Puncture 25 years |
| Expected Durability | About 40 years |
| Color Used This Time |
Shade Blue
|
Leave Your Roof Renovation in Kohoku-ku, Yokohama to Kakeru Koumuten!
Our company has extensive experience in roof renovations in Kohoku-ku.
We are happy to assist with partial roof repairs, including roof overlay work, roof replacement, and leak repairs.
If you have any questions or concerns, such as “I just want to know the estimate for the roof renovation” or “I want to know about roofing materials,” please feel free to contact us!
Community-Focused Service
As a home improvement company based in Aoba-ku, Yokohama, we have handled many roof renovations in nearby Kohoku-ku and have a deep understanding of the needs of local customers. Whether you want to “make it last with one renovation,” “keep costs down,” or “improve insulation because the indoors are hot,” we provide optimal solutions for your specific requests.
Conclusion
Estimates and inspections are, of course, free! If you have any issues with roofs, rain gutters, exterior walls, or exteriors, please consult Kakeru Koumuten Co., Ltd. in Aoba-ku, Yokohama!
Kakeru Koumuten 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.
We are confident that our “cost, quality, and good planning” are unmatched compared to other companies in exterior renovation work!
We are confident in our exterior renovations, so we welcome competitive estimates!
We offer robust construction guarantees and aftercare services, 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 them!” 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!
・Kohoku-ku, Yokohama | Roofing | We performed roof replacement work and cap metal replacement work!
・Aoba-ku, Yokohama | Roofing | We carried out roof replacement using Super Galtect!
・Kohoku-ku, Yokohama | Roof Overlay (Cover Method) | We performed a cover method using Super Galtect!
・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 work and how to choose a contractor, etc.
・Latest | Grants and subsidies available for remodeling, and reduction systems!
・How much does roofing work cost? We will introduce the cost range!
・What is the cost range for rain gutter repair and cleaning? Tips on timing and choosing contractors for fire insurance too!!
・Renovation Store in Yokohama, Kanagawa Prefecture | What is Roof Overlay (Roof Cover Method)?
LINEConsultations via LINE 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!


