Aoba-ku, Yokohama | Request from Company E | Roofing Work | Performed Roof Overlay (Cover Method) with Super Galtect!

Hello!
This is Yamanaka from Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior painting, and exterior renovations located in Aoba-ku, Yokohama!
This is a case study of an exterior renovation project we undertook in Totsuka-ku, Yokohama, requested by Company E.
There are several types of exterior renovations, and the work this time involved a roof overlay (Galtect) project!
We implemented measures against leaks through the roofing work!

On this page, I will explain the actual results of the work done by Kakeru Koumuten!

Thank you very much for choosing Kakeru Koumuten Co., Ltd. from among many contractors.

 

Construction Data for Totsuka-ku, Yokohama

横浜市　戸塚区 工事内容

Temporary scaffolding

Roof overlay (cover method)

Existing substrate / Materials used

Existing roofing material: Slate
Roof overlay (cover method) materials used: Super Galtect (Color: Shade Brown)
Durability: Approximately 35 to 40 years, in-house warranty: 10 years, manufacturer warranty: coating 15 years, rust 20 years, perforation 25 years

Construction Period Approximately 1 week Completion Month September 2022

Roof Overlay Construction Procedure

1. Dismantling Existing Roof Ridge Flashing

We will dismantle unnecessary existing roofing materials (ridge flashing, snow guards) for the

cover method! The durability of wooden purlins is approximately 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)

The roofing used in

3.Accessory Processing (Karakusa and Keraba)

Before the main roofing work of

4. Main Construction (Aiji Industry/Super Galttect)

After processing the accessories

5. Ridge Cap Processing and Sealing at Various Locations

6. Cleaning

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.
Our company also provides a 10-year construction warranty!
Made of SGL steel plate, it is also 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 highly 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 frequently used in our construction achievements, gaining significant attention!

Colors

■ Shade Black

■ Shade Brown

■ Shade Blue

■ Shade Moss Green

■ Shade Charcoal

You can choose from these 5 colors!

This time, the roof overlay work was completed very well in Shade Brown!
The customer was very satisfied, and I was also very happy!
Thank you very much!

Please check out other roofing work examples from here!

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 laid on top of another, it is also referred to as “overlapping roofing.”

Benefits of the Overlay Method

Since we overlay a “new roof” on the “existing roof,” there is almost no need for demolition work, meaning very little waste is generated.
This is our biggest feature, leading to various benefits.

The only part that requires demolition and waste disposal is the ridge cap, so compared to complete roof replacement, the cost is lower.
In 2004, regulations regarding the concentration of asbestos in raw materials were changed (for more details, please visit the Ministry of Health, Labour and Welfare’s website).
Some building materials used in structures built 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 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 feel free to 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 makes the overall cost lower.
This also reduces the psychological anxiety of having to live in an unusual environment.
If 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 exterior renovation work, but the roof overlay method is the most frequently performed service we offer. We are very grateful that we have been continuously engaged in roof overlay projects without interruption.

Roof Material	Aijii Kogyo/Super Galtect
Manufacturer Warranty	Coating 15 years, Red rust 20 years, Perforation 25 years
Expected Durability	Approximately 40 years
Color Used This Time	Shade Brown

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!