Hello!
We are Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior painting, and exterior renovations!
This is a case study of exterior renovations in Tama City, Tokyo.
This time, we will be conducting a roof replacement work using slate roofing (containing asbestos) with Super Galtect, along with eaves and fascia metal work and rain gutter replacement!
Thank you very much for choosing Kakeru Koumuten Co., Ltd. from among many contractors.
For this project, as we are replacing roofing materials containing asbestos, we will carry out the removal, transportation, and disposal with the utmost care.
The roofing material “Super Galtect” used in the roof replacement work is the most commonly handled material by our company, and we have extensive experience with it!
目次
- 1 Construction Data for Tama City, Tokyo
- 2 Roof Replacement Construction Procedure
- 2.1 1. Dismantling Existing Roofing Material
- 2.2 2.Installation of Sheathing Boards
- 2.3 3. Installation of Roofing (Waterproof Sheet)
- 2.4 4. Fabrication and Installation of Accessories (Curlicue, Eaves, Ridge Base)
- 2.5 5. Main Construction (Aiji Industrial / Super Galtect)
- 2.6 6. Ridge Metal and Sealing at Various Locations
- 2.7 7. Cleaning
- 2.8 About Roofing Materials
- 2.9 Roofing materials used for roof repair
- 3 Fascia Metal Cover Work & Eaves Gutter Replacement Procedure
- 4 For Roof Renovations in Tama City, Tokyo, Trust Kakeru Koumuten!
Construction Data for Tama City, Tokyo
| Construction Location |
| Tama City, Tokyo |
| Construction Details |
| Temporary Scaffolding Installation Roof Replacement Work Rain Gutter Replacement Work Fascia and Soffit Metal Work |
| Background to the Construction |
|
We received the following estimate request from a customer living in Tama City, Tokyo. The customer is considering roof work and would like to have the roof inspected. They want to carry out a roof replacement using Super Galtect. Additionally, they would like to have the rain gutters checked as they are significantly deteriorated. ●Proposal Details We are pleased that you are satisfied with both the cost and the plan, and have entrusted us with the construction! |
| Existing Roofing Material / New Roofing Material |
|
● Building Information ● New Materials Used |
| Price Range |
| 800,000 to 900,000 |
| Construction Period |
| Approximately 6 days |
| Completion Month |
| April 2025 |
Roof Replacement Construction Procedure
1. Dismantling Existing Roofing Material

2.Installation of Sheathing Boards

3. Installation of Roofing (Waterproof Sheet)

This is a highly durable and cost-effective underlayment material. The expected durability is about 30 years!
With the role of secondary waterproofing, if the roofing is properly installed, there will be no leaks! We will ensure it is laid down securely to avoid any misalignment.
When choosing the durability of the roofing sheet, it is best to select one that is as close as possible to the durability of the new roofing materials! New Liner Roofing is relatively close in durability to Super Galtect, so we recommend using New Liner Roofing when performing roofing work with Super Galtect!
4. Fabrication and Installation of Accessories (Curlicue, Eaves, Ridge Base)

The accessories used are genuine Galtect accessories made of SGL copper plate!
5. Main Construction (Aiji Industrial / Super Galtect)

The main roofing material is secured using “Aiji Industrial’s roof renovation screws” from the Galtect manufacturer! Since they are made of stainless steel and treated with a disco process, they are resistant to rust and provide better wind resistance compared to nails!
Once the roofing is completed up to the ridge, we will install the necessary ridge substrate to secure the ridge metal. We offer three types of ridge boards (ridge substrate): cedar, resin, and Galvalume steel, and this time we used Galvalume steel!
Galvalume steel is expected to have three times the durability compared to cedar! Unlike resin and cedar, it does not crack, providing peace of mind! We recommend choosing a ridge substrate with a durability similar to that of the new roofing material, just like the roofing sheet.
For the lower ridge (corner ridge), we will use our original integrated waste board made of Galvalume steel.
Our original integrated waste board made of Galvalume steel 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! It is perfect for the ridge substrate of Super Galtect!
6. Ridge Metal and Sealing at Various Locations

We will use stainless steel nails and screws that are resistant to rust!
Unlike nails, screws with packing are less likely to come out and securely fix the ridge cap to the wood!
Although it is not visible after installation, by attaching a face plate inside the ridge cap, waterproofing is enhanced!
We will thoroughly protect the ridge, which is a critical point of the roof.
7. Cleaning
About Roofing Materials
The roofing material used is Aijii Industry’s Super Galtect.
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 tightly adhered from edge to edge of the roofing material, creating a metal plate that integrates steel 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 warm winter experience.
It also has soundproofing properties, reducing the sound of rain.
Additionally, it is lighter compared to other roofing materials, which reduces 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 Aijii Industry’s Super Galtect is the most frequently used and is highly regarded!
Color
■Shade Black

■Shade Brown

■Shade Blue

■Shade Moss Green

■Shade Charcoal

■New Color Shade Wine Red

You can choose from these 6 colors!
This time, the roof replacement work was completed very well with Shade Moss Green!
The customer was very satisfied, and I was very happy too!
Thank you very much!
Please check out other roofing work achievements from here!
Roofing materials used for roof repair
| Roof Material |
|
|---|---|
| Manufacturer Warranty | Coating 15 years, Red Rust 20 years, Perforation 25 years |
| Expected Durability | About 40 years |
| Color Used This Time |
Shade Blue
|
Fascia Metal Cover Work & Eaves Gutter Replacement Procedure
The fascia board and the eaves (the fascia board on the side with the rain gutter) play a crucial role in preventing wind from adversely affecting your home.
During strong winds, such as those from typhoons, rain can blow in horizontally, so the fascia board and eaves help to disperse the wind, making it harder for rain carried by the wind to reach the junction between the roof and the exterior wall materials. This helps to prevent rain from blowing in.
Generally, maintenance of the fascia board and eaves (the fascia board on the side with the rain gutter) is done through “painting,” but when there is overall damage that cannot be repaired by painting, metal work is performed.
Metal work for the fascia board involves covering it with Galvalume steel sheets as part of a renovation project.
This is also referred to as metal wrapping or covering work.
This time, since there was overall deterioration, we performed metal covering work!
1. Removal of Existing Rain Gutter
2. Flat Sheet Metal Processing
3. Installation of Rain Gutter
4. Cleaning and Water Flow Test
For the rain gutter, we used Panasonic/PC50. This rain gutter has a steel plate inside, giving it greater strength compared to others. Finally, we will conduct cleaning and a water flow test to complete the work.
About Rain Gutters
Color
■Milk White

■Pearl Gray

■Modern Beige

■Oak Brown

■Shincha

■Black

That’s all!
This time, the replacement work was beautifully finished in white!
The customer was very satisfied! Thank you very much!
Please check out other rain gutter construction achievements from here!
| Rain Gutter | Panasonic/PC50![]() |
|---|---|
| Color | Milk White
|
Kakeru Koumuten’s Exterior Renovation Process
1. Contact Us
First, please let us know the condition of your roof and exterior walls via phone or email!
2. On-Site Inspection & Estimate
We will schedule a date and time for the on-site inspection based on your preferences and visit your home.
We will check the shape, materials, and installation conditions of the roof and building.
After that, we will create and provide you with an estimate that includes the necessary work and costs!
3. Decision on Whether to Proceed with the Exterior Renovation
Based on the inspection results and estimate, we will ask for your decision.
Rest assured, we will not pressure you into proceeding with the work.
You are welcome to compare our estimate with others before making your decision!
4. Contract & Schedule Construction Dates
Once you have thoroughly reviewed the estimate and decided to proceed with Kakeru Koumuten, we will have you fill out the contract (by mail or in person) and discuss your availability to set the construction schedule.
5. Start of Construction
Experienced workers will carry out the construction responsibly! Depending on the nature of the work and weather conditions, the scheduled construction period may shift or extend.
6. Completion of Construction (Photo Review)
We will explain the repair items and show you photos of the completed exterior walls and roof before handing them over. If you have any concerns at that time, please feel free to let us know!
7. Payment
For Roof Renovations in Tama City, Tokyo, Trust Kakeru Koumuten!
Our company handles everything from the installation of temporary scaffolding to roof and exterior wall work all in one go!
Therefore, whether you want to “make it last longer with one renovation,” “keep costs down as much as possible,” or “improve insulation because the indoors are hot,” we will propose the best plan to meet your specific needs!
List of Areas in Tama City, Tokyo
Tama City Atago / Tama City Ichinomiya / Tama City Ochiai / Tama City Otsukawa / Tama City Kaito / Tama City Karakida / Tama City Koitata / Tama City Sakuragaoka / Tama City Sannoshita / Tama City Suwa / Tama City Sekido / Tama City Tsurumaki / Tama City Toyogaoka / Tama City Nakazawa / Tama City Nagayama / Tama City Higashiterukata / Tama City Seigaoka / Tama City Babihizawa / Tama City Minamino / Tama City Hyakusa / Tama City Renkouji / Tama City Wada
Summary
These are the construction achievements for roof renovations in Tama City, Tokyo!
We handled everything in-house, including the installation of temporary scaffolding, roof replacement work, eaves and fascia metal work, and rain gutter replacement!
Estimates and inspections are, of course, free!
If you have any concerns regarding ‘roofing, rain gutters, exterior walls, or exteriors’ in Tama City, Tokyo, please consult Kakeru Koumuten Co., Ltd.!
Kakeru Koumuten is a remodeling company strong in exterior renovations, and we conduct everything from temporary scaffolding work to roofing and exterior painting completely 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! We also offer comprehensive construction guarantees and aftercare maintenance, receiving high praise for our cost performance and appropriate proposals that align with 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 roofing costs and pricing plans for the roof overlay (cover 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!
・[Tama City, Tokyo] We have completed exterior wall painting using premium silicone!
・[Tama City, Tokyo] Leave your rain leak repairs to Kakeru Koumuten!
・[Tama City, Tokyo] For roof repairs and roof renovations, trust Kakeru Koumuten!
・About the costs of roof overlays | Kakeru Koumuten’s roofing plans!
・About the costs of exterior wall painting | Kakeru Koumuten’s exterior wall painting plans!
・About the costs of rain leak repairs | Kakeru Koumuten’s rain leak repair plans!
・About the costs of exterior wall cleaning | No scaffolding needed for our exterior wall washing plan!
・Latest information on subsidies, grants, and reduction systems available for renovations!
・What is a kasagi? A detailed explanation of its role and repair methods!
・Explaining the necessity of roof construction and exterior painting!
LINE consultations are also very welcome◎
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!





