Tokyo | Shinjuku-ku | Request from Company A: Roof Renovation and Leak Prevention Completed!

Hello!
This is 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 an exterior renovation project requested by Company A in Shinjuku-ku, Tokyo.
There are several types of exterior renovations, and this project involves a roof overlay (cover method) using Galtect!
We implemented measures against leaks through the roofing work!

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

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

Roof Overlay (Cover Method) Construction Steps

1. Dismantling of Existing Roof Ridge Flashing

We will dismantle the existing roofing materials (ridge cap, snow guard) that are unnecessary for the

roof overlay method! The existing purlin in the photo is made of wood. The lifespan of wooden purlins is about 10 to 15 years. Exceeding the lifespan can lead to corrosion and discoloration, resulting in the ridge cap coming loose or being blown away.

2. Roofing Installation (Waterproof Sheet)

The roofing used is Nissin Kogyo/Kappa 23!
It is made of modified asphalt roofing, which is said to have double the lifespan of regular asphalt roofing.
As a primary waterproofing measure, if the roofing is properly installed, there will be no leaks!
We will ensure it is securely attached to prevent it from blowing away.[/chat]

3. Component Processing (Curly Patterns & Eaves)

Before the main roofing work, we will process and install components such as eaves and curly pattern metal!
The materials used for the components are galvalume steel. [/chat]

4. Main Body Construction (Aijii Kogyo/Super Galtect)

After processing the

5. Processing of Ridge Metal and Sealing at Various Locations

6. Cleaning

We will clean up the debris that has fallen onto the balcony and rain gutters. We will thoroughly carry out this task as nails and metal scraps can lead to injuries.

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 resistant to rust.
Insulation material is thoroughly 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 high heat-reflective paint, allowing for a cool summer and a warm winter.
Additionally, it has soundproofing properties, reducing the sound of rain.
Being lighter than other roofing materials, it also minimizes shaking during earthquakes, contributing to earthquake resistance.
It excels in finish, durability, insulation, soundproofing, and wind resistance, and the Super Galtect from Aijii Industry is the most commonly 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 cover work was done in Shade Brown, and it turned out exceptionally well!
The customer was very satisfied, and I was also very happy!
Thank you very much!

Please take a look at our other roofing project achievements here!

What is the Roof Overlay (Cover Method)?

The roof overlay method involves leaving the current roof almost intact and placing a new roof on top of it.
Literally, it is a method of covering a roof with another roof. Therefore, the roof becomes double-layered. Since the roof is laid over the existing one, it is also referred to as “overlapping 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 caps, 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’s website).
Some building materials used in constructions completed before 2004 contain asbestos. Asbestos-containing materials are difficult to dismantle 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?” 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, the construction can be completed in a shorter time frame than painting or complete replacement. A shorter construction period means lower labor costs, which in turn makes the overall cost lower.
The psychological anxiety of having to live in an unusual environment is also reduced.
When scaffolding is set up, there may be inconveniences such as difficulty entering and exiting or being unable to open 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 method is the most frequently performed type of work we undertake. We are very grateful that we have been continuously engaged in roof overlay projects without interruption.

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

Leave Your Roof Renovation in Tokyo to Kakeru Koumuten!

Our company has extensive experience in roof renovations in Tokyo.
We are happy to handle everything from roof overlay work, roof replacement, roof re-roofing, to partial roof repairs such as 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!

Summary

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 is a remodeling company strong in exterior renovations, and we carry out complete in-house construction from temporary scaffolding to roof work and exterior wall painting.
We are confident that in terms of “cost, quality, and efficiency,” we do not fall behind compared to other companies!

We are confident in our exterior renovations, so we welcome competitive estimates!
We offer comprehensive construction guarantees and aftercare services, and we have received positive feedback for our appropriate proposals that match the 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 roof construction 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 remodeling can be found here!

LINE consultations are also very welcome◎

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!