Construction example

Tokyo | Adachi-ku | Request from Company S: We performed a cover work from Pamir to Super Galtect!

施工実績

BEFORE

Before constructionBefore construction

AFTER

After constructionAfter construction

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 S in Adachi-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, we will explain the actual results of the work carried out by Kakeru Koumuten!

 


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

Roof Overlay (Cover Method) Construction Procedure

1. Dismantling of Existing Roof Ridge Flashing

 

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

roof 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 cap coming loose or being blown away.

2. Roofing Installation (Waterproof Sheet)

Waterproof sheetWaterproof sheet

The roofing used is

Nisshin Kogyo/Kappa 23!
It is made of modified asphalt roofing, which is said to have double the durability of regular asphalt roofing.
As a primary waterproofing measure, if the roofing is properly installed, there will be no leaks!
We will secure it firmly to prevent it from blowing away.

3. Component Processing (Curlicue, Eaves, Valley)

Character processingCharacter processing

Before the main roofing work, we will process and install components such as eaves and ornamental metal work!

The components used are the genuine parts of Galttect, made from SGL copper plate!

4. Main Construction (Aijii Industry/Super Galttect)


After processing the components, we will install the Galttect main roofing up to the ridge!
Once the roofing is completed up to the ridge, we will install necessary materials called “nail boards” to secure the ridge metal work. There are types of nail boards made from cedar and resin, and this time we used resin purlins!

5. Ridge Metal Work Processing & Sealing at Various Locations

Ridge metal work processingSealing

Next, we will process and install the ridge metal work. We will thoroughly apply sealing on the inside of the joints. At the wall edge, we will process and install a component called rain guard metal.
The nails and screws used for fastening are made of stainless steel, which is resistant to rust!

6. Cleaning

CleaningCleaning

We will clean up the debris that has fallen on balconies and rain gutters. We conduct thorough cleaning to prevent injuries from nails and metal scraps. We will also wipe away any footprints left on the roof to keep it looking clean.

About Roofing Materials

The roofing material used is the Super Galtect from Aijii Industrial.
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 applied from edge to edge of the roofing material, creating a metal plate that integrates the steel plate and insulation.
During installation, 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, which reduce the sound of rain.
Being lighter than other roofing materials, it also minimizes the swaying during earthquakes, serving as an earthquake countermeasure.
It excels in finish, durability, insulation, soundproofing, and wind resistance, and the Super Galtect from Aijii Industrial is the most frequently used in our construction projects, 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
You can choose from these 5 colors!

This time, the cover work with Shade Black 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 achievements from here!

What is the Roof Overlay (Cover 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 over another, it is also referred to as “overlapping roofing.”

Advantages of the Overlay Method

Since a “new roof” is placed over the “current roof,” dismantling work is almost unnecessary, meaning that very little waste is generated.
This is the biggest feature and leads to various advantages.

The only part that requires demolition and waste disposal is the ridge cap, so compared to a 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 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, resulting in high costs for both demolition and waste disposal. The roof overlay method, which generates almost no waste, is ideal for such roofs.

Some of you may wonder, “Is it safe to live in a building that uses asbestos-containing materials?” but rest assured. As long as they are not destroyed or crushed, they 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, the construction can be completed in a shorter period than painting or a full roof replacement. A shorter construction period means lower labor costs, which in turn reduces the overall cost.
This also alleviates the psychological anxiety of having to live in an unusual environment.
When 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 roofing work, but the roof overlay method is the most frequently performed service we provide. We are very grateful that we have been continuously engaged in roof overlay projects without interruption.

Roof Material

Ai-G Co., Ltd. / Super Galtect

Ai-G Co., Ltd. / Super Galtect
Manufacturer Warranty Coating 15 years, Red Rust 20 years, Perforation 25 years
Expected Durability About 40 years
Color Used This Time

Shade Black

Shade Black

For roof renovations in Tokyo, trust Kakeru Koumuten Co., Ltd.!

Our company has a wealth of experience in roof renovations in Tokyo.
We are happy to assist with everything from roof overlay work, roof replacement, roof repairs, to partial roof repairs such as leak fixes.
“I just want to know the estimate for roof renovation” or “I want to know about roofing materials”—if you have any questions or concerns, please feel free to contact us!

Summary

Estimates and inspections are, of course, free! If you have any issues with roofs, rain gutters, exterior walls, or exterior structures, please consult Kakeru Koumuten Co., Ltd. in Aoba-ku, Yokohama!

Kakeru Koumuten is a renovation company strong in exterior renovations, and we carry out everything from temporary scaffolding work to roof work and exterior wall painting completely in-house.
We are confident that our “cost, quality, and efficiency” in exterior renovation work will not be outdone by other companies!

We are confident in our exterior renovations, so we welcome competitive estimates!
We offer comprehensive construction guarantees and aftercare maintenance, and we have received positive feedback for our appropriate proposals that match our customers’ future life plans and cost performance!

“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 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!