Construction example

Nishi-ku, Yokohama, Kanagawa Prefecture | Roofing | Performed roof overlay and roof renovation with Super Galtect!

神奈川県|横浜市西区|R社様:屋根リフォーム・雨漏り対策を行いました!

BEFORE

Kanagawa Prefecture | Nishi-ku, Yokohama | Company R: Roof renovation and leak prevention were carried out!
Kanagawa Prefecture | Nishi-ku, Yokohama | Company R: Roof renovation and leak prevention were carried out!

AFTER

Kanagawa Prefecture | Nishi-ku, Yokohama | Company R: Roof renovation and leak prevention were carried out!
Kanagawa Prefecture | Nishi-ku, Yokohama | Company R: Roof renovation and leak prevention were carried out!
Kanagawa Prefecture | Nishi-ku, Yokohama | Company R: Roof renovation and leak prevention were carried out!

Hello!
I am Yamanaka from Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior wall painting, and exterior renovations located in Aoba-ku, Yokohama, Kanagawa Prefecture!
This is a case study of a roof renovation in Nishi-ku, 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.

We received a request from Company R, who has been a valued client since our establishment!

Roof Overlay (Cover Method) Construction Procedure

1. Dismantling Existing Ridge and Snow Guards

We dismantle only the ridge flashing and snow guards that would obstruct the overlay work.
1. Dismantling Existing Ridge and Snow Guards

2. Roofing Installation (Waterproof Sheet)

The roofing used this time is modified asphalt. It is expected to have double the durability of asphalt roofing!
2. Roofing Installation (Waterproof Sheet)

3. Component Processing (Karakusa, Keraba, Waste Board)

We will process and install the keraba, karakusa, and waste board.

4. Main Construction

Once the main body is installed, we will place the purlin at the ridge and wall edges. This time, we used cedar purlins, but there are also purlins made of resin that are resistant to corrosion.

5. Ridge Flashing and Rain Stop Flashing Processing

We will process and install the ridge flashing. We will ensure that sealing is properly applied on the inside of the joints. For the wall edges, we will process and install a component called rain stop flashing. We will also apply sealing thoroughly.
5. Ridge Flashing and Rain Stop Flashing Processing
5. Ridge Flashing and Rain Stop Flashing Processing

6. Cleaning

We will remove footprints and any debris that may have fallen around the house and inside the rain gutters, followed by wiping down the area.
We strive to leave the site cleaner after the work than it was before!
6. Cleaning

With that, the construction is complete!

About the Roofing Material

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 10-year construction warranty!

Made of SGL steel plate, it is resistant to rust.
The insulation material is tightly adhered 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 installation record shows that the Super Galtect from Aijii Industry is the most common and highly regarded!

Color

■Shade Black
Shade Black
■Shade Brown
Shade Brown
■Shade Blue
Shade Blue
■Shade Moss Green
Shade Moss Green
■Shade Charcoal
Shade Charcoal

New Color Shade Wine Red

You can choose from these 6 colors!

This time, the cover work in charcoal 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 examples from here!

 

Roof Material

Aiji Giken/Super Galtect

Awarded by the Minister of Education, Culture, Sports, Science and Technology and the National Invention Award for Super Galtect
Manufacturer Warranty Coating 15 years, Red Rust 20 years, Perforation 25 years
Expected Durability Approximately 40 years
Color Used This Time

Shade Charcoal

Shade Charcoal

What is the Roof Overlay 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 layered, it is also referred to as “layered 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 cap, making it more cost-effective compared to complete roof replacement.
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 constructions completed 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, we can complete the work in a shorter time frame than painting or re-roofing. A shorter construction period means lower labor costs, which in turn makes the expenses more affordable.
This also reduces the psychological anxiety of having to live in an environment that is different from usual.
When scaffolding is set up, there may be inconveniences such as difficulty in entering and exiting or trouble 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 (cover method) is the most frequently performed service we provide. We are very grateful that we are continuously able to carry out roof overlay (cover method) projects without interruption.

Summary

With our extensive experience and solid knowledge in roof renovations in Yokohama, Kakeru Koumuten Co., Ltd. has earned high trust from local customers.

Community-Focused Service

As an exterior renovation company based in Aoba-ku, Yokohama, we handle many roof renovations within Yokohama and have a deep understanding of the needs of local customers. Whether you want to “make it last long with one renovation,” “keep costs as low as possible,” or “improve insulation because the indoors are hot,” we provide optimal solutions for your specific requests.

List of Areas in Nishi-ku, Yokohama

Akaimon-cho, Nishi-ku / Higashigaoka, Nishi-ku / Ise-machi, Nishi-ku / Oimatsu-cho, Nishi-ku / Okano, Nishi-ku / Kasumi-ga-oka, Nishi-ku / Kita Karuizawa, Nishi-ku / Kita Saiwai, Nishi-ku / Kusunoki-cho, Nishi-ku / Kubo-cho, Nishi-ku / Goshoyama-cho, Nishi-ku / Sakae no Tani, Nishi-ku / Sakuragi-cho, Nishi-ku / Asama-dai, Nishi-ku / Asama-cho, Nishi-ku / Takashima, Nishi-ku / Chuo, Nishi-ku / Tobe-cho, Nishi-ku / Tobe Honmachi, Nishi-ku / Nishi Tobe-cho, Nishi-ku / Nishi Hiranuma-cho, Nishi-ku / Nishi Mae-cho, Nishi-ku / Hanasaki-cho, Nishi-ku / Hamamatsu-cho, Nishi-ku / Higashi Kubota-cho, Nishi-ku / Hiranuma, Nishi-ku / Fujidana-cho, Nishi-ku / Minato Mirai, Nishi-ku / Minami Karuizawa, Nishi-ku / Minami Saiwai, Nishi-ku / Minami Asama-cho, Nishi-ku / Miyagaya, Nishi-ku / Miyazaki-cho, Nishi-ku / Motokubo-cho, Nishi-ku / Momiji-ga-oka, Nishi-ku

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. We also provide a 10-year construction warranty! You can use it with peace of mind for a long time after just one renovation.
Galtect is a roofing material known for its durability, but we also handle roofing materials with even higher durability and better insulation performance.

Leave Your Roof Renovation in Nishi-ku, Yokohama to Kakeru Koumuten!

Our company is based in Aoba-ku, so we have a wealth of experience in roof renovations in Yokohama.
We are happy to assist with roof overlay work, re-roofing, and partial roof repairs such as leak repairs.
“I just want to know the estimate for the roof renovation,” “I want to know about roofing materials,” if you have any questions or concerns, please feel free to contact us!

Estimates and inspections are, of course, free! If you have any issues with your roof, rain gutters, exterior walls, or exterior structures, 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 won’t 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 also offer comprehensive construction guarantees and aftercare maintenance, and we have received positive feedback for our cost performance and appropriate proposals that align with our customers’ future life plans!

We want you to think, “I’m glad I asked them!” Therefore, 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’re interested!

We look forward to your inquiries. Thank you very much.

Helpful information about exterior renovations can be found here!

LINE consultations are also very welcome◎

We are also updating our Instagram regularly◎ Please follow us◎

 
 
For roofing, guttering, and exterior work and repairs in Kanagawa, contact Kakerukoumuten Co., Ltd..

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!