Construction example

[Nerima-ku, Tokyo] | Roof Renovation | Performed roof overlay (cover method) using Super Galtect!

BEFORE

AFTER

Construction Data | Nerima-ku, Tokyo

 約1週間  Approximately 5 days Completion Month  May 2025

Roof Overlay Construction Procedure

1. Dismantling Existing Metal Sheets

First, we will dismantle unnecessary parts (ridge metal) for the overlay method!

The lifespan of wooden purlins is approximately 10 to 15 years. Once the lifespan is exceeded, corrosion and discoloration occur, leading to the detachment and scattering of the ridge metal.

2. Installing Roofing (Waterproof Sheet)

Next, we will apply the waterproof sheet! The roofing used is Tajima Roofing / Tadi Self Cover, which is a highly durable and waterproof roofing material!

Tadi Self Cover is the ideal roofing sheet for the overlay method of fragile slate materials such as non-asbestos roofing. As a secondary waterproofing measure, if the roofing is properly installed, it will generally not leak. We will ensure it is securely applied to prevent it from being blown away by the wind.

Since there are various lifespans and characteristics of roofing sheets, it is important to choose roofing sheets that match the lifespan of the new roof and the roof slope!

3. Processing of Accessories (Curved and Eaves)

Before the installation of the main roof structure, we will process and install accessories such as arabesques and eaves. The accessories used are the genuine accessories of Galttect, made of SGL steel plate!

The metal fittings at the ridge are our company’s original integrated waste board ridge base. It has a durability of about 30 years and provides high wind resistance.

4.Main Construction (Aijii Industry / Super Galttect)

After processing the accessories, we will install the Galttect main body up to the ridge! The fasteners used for the Galttect main body are genuine stainless steel renovation screws from Aijii Industry!

Once the installation reaches the ridge, we will install the necessary materials to secure the ridge cap, known as the “kanban.” We offer three types of kanban: cedar, resin, and galvalume steel, and this time we used galvalume steel!

Galvalume steel has an expected durability three times that of cedar! Unlike resin or cedar, it does not crack, providing peace of mind!

Our original integrated waste board made of galvalume steel for the ridge base is highly durable, offers strong fixation, and has excellent wind resistance!

Even if rainwater seeps in from the ridge, it has a mechanism to discharge rainwater to the outside, demonstrating high waterproofing performance!

It is perfect for the ridge base of Super Galttect!

5. Ridge Cap Processing and Sealing at Various Locations

We will process and install the ridge cap. To enhance waterproofing, we will install a face plate on the inside of the ridge! We will firmly apply sealing on the inside of the joints.

The screws used for fixation are stainless steel with waterproof packing that is resistant to rust!

Packings screws are less likely to come loose compared to nails,
firmly securing the ridge cap to the purlin!

 

Although it’s not visible after installation,
by attaching a face plate inside the ridge cap,
waterproofing is enhanced!
It firmly protects the ridge, which is a critical area of the roof.

6. Cleaning

After the

roofing work, we will clean up any debris that has fallen onto the balcony or rain gutters. We thoroughly remove nails and metal scraps to prevent injuries.

We also wipe away any footprints left on the roof to keep it clean.

About Roofing Materials

The roofing material used is Ai-Gi Kogyo / Super Galtect. Super Galtect comes with a 15-year paint warranty and a 25-year hole warranty from the manufacturer, along with a 10-year construction warranty from our company! Additionally, it is made of SGL steel, which is resistant to rust.

Insulation material is tightly applied from edge to edge of the roofing material, creating a metal sheet 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 experience.

Moreover, it also has soundproofing properties, reducing the sound of rain. Being lighter than other roofing materials, it minimizes the sway during earthquakes, contributing to earthquake resistance.

It excels in finish, durability, insulation, soundproofing, and wind resistance, and our company’s construction achievements show that Ai-Gi Kogyo’s Super Galtect is the most frequently used, gaining significant attention!

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, we completed the cover work with Shade Charcoal, and it turned out very well!
The customer was also very satisfied, and I was very happy too!
Thank you very much!

Please check out other roofing work achievements from here!

Roof Material

Aijii Gokyo / Super Galtect

Manufacturer Warranty Coating 15 years, Rust 20 years, Puncture 25 years
Expected Durability Approximately 35 to 40 years
Color Used This Time


Shade Charcoal

Shade Charcoal

Leave Your Roofing Work in Nerima-ku, Tokyo to Kakeru Koumuten!

Our company has extensive experience in roof renovations in Nerima-ku, Tokyo.

We are happy to assist with roof overlay work, roof replacement, and even partial roof repairs such as leak fixes!

Whether you want to “make it last with one renovation,” “keep costs down as much as possible,” “improve insulation because the indoors are hot,” or “just need a temporary fix for a leak,” we will propose the best plan tailored to your specific needs!

List of Areas in Nerima-ku, Tokyo

Aoba-ku, Tokyo / Asahigaoka, Nerima-ku, Tokyo / Oizumigakuencho, Nerima-ku, Tokyo / Oizumicho, Nerima-ku, Tokyo / Kasugacho, Nerima-ku, Tokyo / Kamishakujii, Nerima-ku, Tokyo / Kamishakujii Minamicho, Nerima-ku, Tokyo / Kitamachi, Nerima-ku, Tokyo / Mukaiyama, Nerima-ku, Tokyo / Kotakecho, Nerima-ku, Tokyo / Sakaecho, Nerima-ku, Tokyo / Sakuradai, Nerima-ku, Tokyo / Shimoshakujii, Nerima-ku, Tokyo / Shakujidai, Nerima-ku, Tokyo / Shakujicho, Nerima-ku, Tokyo / Sekimachi Higashi, Nerima-ku, Tokyo / Sekimachi Minami, Nerima-ku, Tokyo / Sekimachi Kita, Nerima-ku, Tokyo / Takano Dai, Nerima-ku, Tokyo / Takamatsu, Nerima-ku, Tokyo / Tabara, Nerima-ku, Tokyo / Tachinocho, Nerima-ku, Tokyo / Doshida, Nerima-ku, Tokyo / Toyotama Ue, Nerima-ku, Tokyo / Toyotama Naka, Nerima-ku, Tokyo / Toyotama Minami, Nerima-ku, Tokyo / Toyotama Kita, Nerima-ku, Tokyo / Nakamura, Nerima-ku, Tokyo / Nakamura Minami, Nerima-ku, Tokyo / Nakamura Kita, Nerima-ku, Tokyo / Nishi Oizumi, Nerima-ku, Tokyo / Nishi Oizumi Cho, Nerima-ku, Tokyo / Nishiki, Nerima-ku, Tokyo / Nankai, Nerima-ku, Tokyo / Nerima, Nerima-ku, Tokyo / Hazawa, Nerima-ku, Tokyo / Hayamiya, Nerima-ku, Tokyo / Hikarigaoka, Nerima-ku, Tokyo / Hikawadai, Nerima-ku, Tokyo / Higashi Oizumi, Nerima-ku, Tokyo / Fujimidai, Nerima-ku, Tokyo / Heiwadai, Nerima-ku, Tokyo / Minami Oizumi, Nerima-ku, Tokyo / Minami Tanaka, Nerima-ku, Tokyo / Mihara Dai, Nerima-ku, Tokyo / Tanihara, Nerima-ku, Tokyo

Long-term Reliability

All roofing materials we use are highly reliable products that come with long-term warranties!

For example, the Super Galtect we used this time comes with a 15-year paint 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.

Super 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, so please feel free to consult with us!

Summary

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 Kanagawa Prefecture!

Kakeru Koumuten is a company strong in exterior renovations. From temporary scaffolding work to roofing and exterior painting work we handle everything in-house! We are confident that our “cost, quality, and efficiency” are unmatched compared to other companies!

We are confident in our exterior renovations, so we welcome competitive estimates! Our construction warranties and aftercare services are comprehensive, and we have received positive feedback for our appropriate proposals that match the cost performance and your future life plans!

We take every request seriously so that you can think, “I’m glad I asked them!”.

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

Helpful information about exterior renovations can be found here!

We welcome inquiries via LINE as well◎

LINE

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Instagram

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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!