Construction example

[Aoba-ku, Kawasaki]|We performed a roof overlay using Super Galtect on a slate roof!

BEFORE

AFTER

Kawasaki City, Miyamae Ward | Construction Data

 約2週間 About 1 week Completion Month April 2025

Roof Overlay Construction Procedure

1. Dismantling Existing Ridge and Snow Stops

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

The durability of wooden purlins is about 10 to 15 years. Exceeding the durability period can lead to corrosion and discoloration, resulting in the ridge flashing coming loose or being blown away.

2. Installing Roofing (Waterproof Sheet)

Next, we will apply the waterproof sheet! The roofing used is Tajima Roofing/New Liner Roofing, which is highly durable and waterproof!

The expected durability is about 30 years!
The roofing acts as a secondary waterproofing layer, and if it is properly installed, there will be no leaks! We will ensure it is applied tightly to prevent gaps.
When selecting roofing sheets, choose those with durability as close as possible to the new roofing materials! New Liner Roofing has a durability that is relatively close to Super Galtect, so we recommend using New Liner Roofing when performing roofing work with Super Galtect!

3. Fabrication of Fittings (Curved Patterns, Eaves, Valleys)

Before the installation of the main roof body, we will process and install components such as the eaves, arabesque, and valleys. The components used will be the genuine parts of Galtect’s SGL steel plate!

The metal fittings at the ridge will be our company’s original integrated waste board ridge base. It has a durability of approximately 30 years and provides high wind resistance. [/chat]

4. Main Construction (Aijii Industry / Super Galtect)

After processing the components

, we will install the Galtect main body up to the ridge! The fasteners used for the Galtect 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 flashing, known as the “kanban.” We offer three types of kanban: cedar, resin, and galvalume steel, and this time we used galvalume steel!

Galvalume steel is expected to have three times the durability 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, has strong fixation, and excellent wind resistance!

Even if rainwater enters 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 Galtect!

5. Ridge Flashing Processing & Sealing at Various Locations

We will process and install the ridge flashing. 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 will be stainless steel with waterproof packing, which is resistant to rust!

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

 

Although it is not visible after construction,
installing a face plate on the inside of the ridge cap
enhances waterproofing!
It firmly protects the ridge, which is a critical point of the roof.

6. Cleaning

After the

roofing work, we 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 Aji Giken / Super Galtect. Super Galtect comes with a 15-year coating warranty and a 25-year perforation 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.

The insulation material is tightly applied from edge to edge of the roofing material, creating a metal sheet that integrates the steel plate and insulation. During installation, insulation is applied even to the areas 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 also has soundproofing properties, reducing the sound of rain. Being lighter than other roofing materials, it minimizes the sway during earthquakes, providing earthquake resistance.

It excels in finish, durability, insulation, soundproofing, and wind resistance, and our company’s construction achievements show that Aji Giken’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 very satisfied, and I was also very happy!
Thank you very much!

Please check out other roofing work results from here!

Roof Material

Aiji Giken / 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 Miyamae-ku, Kawasaki to Kakeru Koumuten!

Our company is based in Aoba-ku, Yokohama, and we have extensive experience in roof overlay work in Miyamae-ku, Kawasaki.

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 a roof renovation” or “I want to know about roofing materials,” please feel free to contact us!

Community-Focused Service

As an exterior renovation company in Aoba-ku, Yokohama, we have handled many roof renovations within Kanagawa Prefecture and deeply understand the needs of local customers. Whether you want a long-lasting renovation in one go, want to keep costs down, or want to improve insulation because your indoor space is hot, we will propose the best solutions for your specific requests.

List of Areas in Miyamae-ku, Kawasaki

Aiba-ku, Miyamae / Inuzuka, Miyamae / Kajikitani, Miyamae / Keyakidai, Miyamae / Odai, Miyamae / Goshoduka, Miyamae / Saginuma, Miyamae / Shio Midai, Miyamae / Kamikihoncho, Miyamae / Kamiki, Miyamae / Shirahata-dai, Miyamae / Sugao-oka, Miyamae / Sugao, Miyamae / Taira, Miyamae / Dobashi, Miyamae / Minami-Hirabayashi, Miyamae / Nishinogawa, Miyamae / Nogawadai, Miyamae / Nogawa-honcho, Miyamae / Hatsuyama, Miyamae / Higashi-Aiba, Miyamae / Masukune, Miyamae / Mizusawa, Miyamae / Minami-Nogawa, Miyamae / Miyazaki, Miyamae / Miyamae-daira, Miyamae

Long-Term Reliability

All roofing materials we use come with a high level of reliability and 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 from the manufacturer. We also provide a 10-year construction warranty, allowing you to use your roof 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 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 Aoba-ku, Yokohama!

Kakeru Koumuten has become a strong renovation company specializing in exterior renovations, performing everything from temporary scaffolding work to roofing and exterior wall painting completely in-house. We are confident that our “cost, quality, and planning 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 our customers’ future life plans and cost performance!

“I’m glad I chose you!” We take every request seriously to ensure you feel this way.

We also have information on roofing costs and pricing plans for roof overlay methods, 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◎

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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!