If you are looking for an exterior wall siding contractor in Kakeru Koumuten, Minato-ku, Tokyo

This will definitely be useful for customers considering exterior wall siding in Minato-ku, TokyoPlease take a look!

The most important thing to consider when looking into exterior wall siding is “multiple estimates”!
Let’s get at least three estimates from exterior renovation companies that cover Minato-ku!

Estimates and consultations are free!
Multiple estimates are very welcome!

What is the exterior wall cover method?

We will explain in detail the recommended points and precautions of the exterior wall cover method!

The exterior wall cover method is a construction that overlays a new exterior wall on top of the existing exterior wall.
It is possible to overlay various types of walls such as ALC walls, ceramic siding, and mortar walls.
The exterior materials used in the exterior wall cover method are basically lightweight and durable metal siding.

Although the costs are higher compared to exterior painting, it is a renovation method for exterior walls that has various benefits and is gaining attention year by year.

Why is the exterior wall cover method popular?

Here are the “five points” that Kakeru Koumuten’s exterior wall cover method is highly praised for!

Point 1　Super high durability!!

Metal siding offers significantly higher durability compared to exterior painting.
Galvalume steel, SGL steel, and aluminum are types of metal siding, and with aluminum, you can expect a durability of over 40 years!
Additionally, unlike ceramic siding or mortar exteriors, it does not crack or break, making its sturdiness one of its advantages!
If you use high-durability sealing materials, maintenance will be unnecessary for nearly 30 years!

Point 2　Improved Insulation!!

Cross-section of metal siding

The metal siding used in the exterior cover method comes with integrated insulation materials.
Moreover, by installing battens before the metal siding installation to create a ventilation layer, the insulation properties are significantly enhanced!
This improvement in insulation is one of the major benefits of metal siding.

Point 3　Comprehensive Warranty for Peace of Mind!!

While many construction companies offer their own warranties for exterior painting, manufacturer warranties are generally not included.
Metal siding comes with solid manufacturer warranties, such as coating and perforation guarantees, providing a high level of reassurance for long-term exterior renovations!

Point 4　Improved Waterproofing!!

With the exterior material being double-layered, it effectively prevents rainwater intrusion, significantly enhancing waterproofing.
Applying waterproof paper before installation further increases waterproofing capabilities!

Point 5　Improved Aesthetic Appeal!!

Various designs such as wood grain and tile patterns

Metal siding allows for a finish that resembles a brand-new construction, which cannot be achieved with exterior painting.
There are various designs available, ranging from simple styles to tile and wood grain patterns.
You can choose from a variety of designs that match the atmosphere and your preferences of the building!
Major manufacturers include “Aiji Industrial“, “Keimyuu“, “Nichiwa“, and “Asahi Tostem“, each offering a variety of types and designs of metal siding.
If you find a product of interest in the catalog, you can also request cut samples!

What are the important points to consider when doing exterior wall cover work with metal siding?

Next, we will explain the “three points to be cautious of” when using metal siding for exterior wall cover work!

Point 1　Few contractors can perform the work

There are significantly fewer contractors capable of performing the cover method with metal siding compared to exterior painting contractors.
Many inexperienced contractors exist, leading to a higher likelihood of troubles.
Since there can be a wide range of estimates, to ensure a satisfactory project, if you are considering the exterior wall cover method with metal siding, make sure to get estimates from three or more companies and thoroughly check the details!

Point 2　Prone to dents and scratches

Metal siding can develop dents from impacts when objects hit it.
Additionally, being prone to scratches is one of its disadvantages.
If noticeable scratches occur and are a concern, you can request repairs from a specialized repair contractor!

Point 3　Long construction period

Exterior wall cover work is arguably the most extensive type of exterior renovation.
While exterior painting typically takes about 2 to 3 weeks, exterior wall cover work can often take nearly a month.
The long construction period can be a source of stress for residents, making it one of the disadvantages.

Examples of exterior wall cover work

Construction Details

Exterior wall cover work

Completion Date

January 2025

Inquiry Details

I am considering a renovation of the exterior walls. I would like to use high-durability metal siding with a solid warranty. Since this is a comparative estimate, I would like to request a quote for the same type of metal siding as other companies’ estimates.

Proposal Details

We have proposed a roof overlay (cover method) using metal siding as per your request. Since you had several preferred types of metal siding, we have created separate estimates for each! You entrusted us with the “Aiji Industry/SF-Gal Stage Shine” metal siding! The above siding is made of galvanized steel with heat-insulating fluorine processing, and it is integrated with insulation material, providing excellent thermal insulation. You mentioned that you obtained estimates from three companies, and we were able to secure your order due to our competitive pricing and thorough explanations compared to other companies!

Price Range

2,000,000 – 2,100,000 yen

Construction Period

Approximately 3 weeks

Existing Exterior Material/New Exterior Material

Existing exterior: ALC 　New exterior: Metal siding (Aiji Industry/SF-Gal Stage Shine) 　Material: Galvanized steel with heat-insulating fluorine processing 　In-house warranty: 10 years 　Manufacturer warranty: 10 years for fading, 10 years for red rust, 10 years for perforation 　Furring strips: Made of resin

1. Painting of Auxiliary Parts

2. Removal of Equipment

3. Substrate Adjustment

4. Waterproof Paper Installation (may not be necessary)

5. Installation of Battens

6. Metal Work for Fittings

7. Main Construction

8. Sealing at Various Locations

9. Reinstallation of Equipment

10. Completion

About the Costs of Exterior Wall Covering Work

This is a guideline table for the estimated costs of exterior wall cover work.
It represents the estimated costs for a 30-tsubo exterior wall cover method.

The costs for the exterior wall cover work will be estimated based on the following calculation.
Exterior wall area (㎡) × Siding unit price + Equipment removal and installation costs + Additional painting costs = Total amount
This will be the calculation.

Material	Expected Durability (Years)	Cost Assuming a building area of 30 tsubo (150㎡)
Galvalume Steel	30 to 35	Including Tax Approximately 2,000,000 yen (Siding unit price 11,000 yen/㎡~)
SGL Steel	35 to 40	Including Tax Approximately 2,200,000 yen (Siding unit price 12,500 yen/㎡~)
Aluminum	40 or more	Including Tax Approximately 2,500,000 yen (Siding unit price 14,000 yen/㎡~)

The amount will vary depending on the number of additional parts to be painted, the number of windows, and the equipment to be removed and reattached.
This is just a guideline for the cost, so for a detailed estimate, please feel free to contact us as it is completely free of charge.

How to Choose a Siding Contractor

There are fewer contractors that handle exterior wall cover work compared to exterior painting contractors, so it may be difficult to find a reputable contractor, such as “where should I request?”
The most important thing in choosing a contractor and obtaining an estimate is to always obtain multiple estimates!

For this reason, when requesting exterior wall cover work, let’s check the following four points.

By checking the above four points, you will be able to choose a trustworthy contractor.

1. Check the contents and materials of the estimate

When obtaining an estimate for exterior wall cover work, let’s check the following items!

・Is the proposed new siding material suitable for your requirements?

Check whether materials that meet your requirements, such as durability and insulation, are being proposed!
Since there are various types of metal siding, such as cost-effective siding and insulation-focused siding, make sure that the siding proposed aligns with your original requirements!

・Is the proposed construction method appropriate?

When performing exterior wall cover work, it is necessary to create a ventilation layer between the existing wall and the new wall material using a method called “ventilation method.”
If you do not create a ventilation layer and apply it directly, moisture cannot escape, leading to mold or corrosion, and may result in peeling or lifting of the wall material.
Check whether the proposed construction is appropriate!

・Are the quantities and construction details described in detail?

If the estimate states something vague like “exterior wall cover work 1 set,” it will be difficult to understand the construction method and what the costs are for.
Having detailed descriptions of the lengths of base water cut-offs and trim edges, along with unit prices and quantities, will provide peace of mind and help prevent issues.
If there are items of concern that are not included in the estimate, be sure to ask why they are not included!

・Check the auxiliary materials to be used!

Check not only the main siding but also the types of detailed auxiliary materials such as “types of battens“, “siding fasteners“, and “types of waterproof paper“!
For example, siding fasteners are screws, and the overall cost will vary between iron and stainless steel.
While iron may appear cheaper at first glance, stainless steel is resistant to rust and is recommended as a fastener.

2. Confirm the existence of warranties and aftercare services

When choosing a contractor for exterior wall cover work, be sure to check for warranties.

Exterior wall cover work is one of the more expensive renovations, so in addition to checking for manufacturer warranties, also confirm whether the company offers its own warranty!
If the contractor has a warranty period, they may provide free repairs within that period.

Warranty periods vary by contractor and the specifics of the work, but a 5 to 10-year period is common.

Additionally, some contractors offer after-sales services separate from warranties, so be sure to check if the contractor you are considering has after-sales services.

Kakeru Koumuten Co., Ltd. always includes a warranty with its exterior wall cover work.
We also provide after-maintenance services and send out annual direct mail, so if you wish, inspections can be conducted every year.

Warranty and Payment翔工務店の屋根工事、外壁塗装工事、シーリング工事の保証など簡単にご説明させて頂いております！！ 弊社では前金、中間金は頂いておりません！！...

3. Obtain estimates from multiple contractors (at least 3 companies)

When requesting exterior wall cover work, be sure to obtain estimates from multiple contractors.

The cost of the same repair can vary between contractors, as can warranties and after-sales services.

Additionally, obtaining multiple estimates makes it easier to negotiate prices.

To request your desired repair contractor at the best possible price, obtaining estimates from multiple contractors is essential.
When comparing estimates, consider not only the costs but also the details of the plans, materials, and auxiliary materials!

4. Confirm whether the company performs exterior wall cover work in-house

There are cost differences between companies that handle the work in-house and those that outsource it to external companies, which can also lead to communication errors and other issues with external contractors.

Furthermore, if problems arise after the work is completed, responses may be delayed, or there may be no dealings with the external contractor, leading to potential troubles.
Being able to respond immediately when something goes wrong is one of the reasons why companies that perform the work in-house are recommended!

About Kakeru Koumuten Co., Ltd.

Kakeru Koumuten Co., Ltd. specializes in roofing, exterior wall work, and scaffolding work with complete in-house construction.
By assembling temporary scaffolding and performing exterior wall cover work in-house,
we can keep costs down while ensuring high-quality work.

Company Introduction

Corporate Profile神奈川で家の外装・屋根の工事、修理なら一番若くて親切な株式会社翔工務店にお任せください。 株式会社翔工務店はリフォームを通して美しく理想の生活空間を創るお手伝いをしています。外装改修、外壁塗装、雨樋修理清掃、屋根の塗装や重ね葺き葺き変えなどの部分的な修理まで、お客様のどのようなご要望にも全力でお応えします。...

Customer Reviews

Service Areas

Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo Metropolis.

Click here for inquiries to Kakeru Koumuten Co., Ltd.!

Possible Subsidies and Grants in Minato-ku, Tokyo

The following subsidies may be available in Minato-ku, Tokyo.

“Long-term Excellent Housing Renovation Promotion Project”

1. Subsidy Rate:

1/3 of eligible costs

2. Maximum Subsidy Amount:

Evaluation Standard Type (when certain performance improvements are recognized):​800,000 yen per unit

Certified Long-Term Excellent Housing Type (when obtaining certification for Long-Term Excellent Housing (renovation)):​1,600,000 yen/unit​

*If renovation work is carried out to accommodate three generations living together, an additional 500,000 yen will be added to the above amount for young families, child-rearing households, or existing home buyers who carry out the renovation work.

3. Requirements for Receiving Assistance:

Ensuring Living Space: The floor area of at least one floor (excluding stairs) must be 40㎡ or more, and the total floor area must be 55㎡ or more.​

Living Environment: If located within areas such as district plans or landscape plans, it must be in harmony with them.​

Development of Maintenance and Preservation Plan: For the maintenance and preservation period (30 years or more), the contents required by the evaluation criteria must be established as a maintenance and preservation plan.​

Contents of Renovation Work: It is required that the renovated house meets the following performance items.​

Performance Item	Overview	Required/Optional
Measures against deterioration of structural framework	Prevention of decay and termite damage to pillars, floors, etc.	Required
Earthquake Resistance	Ensuring earthquake resistance to prevent collapse during major earthquakes	Required
Energy Conservation Measures	Insulation of windows, walls, floors, ceilings, and efficiency improvements for water heaters, etc.	Required
Ease of Maintenance and Renewal	Facilitating inspection, cleaning, and replacement of water supply and drainage pipes	Optional
Measures for the Elderly (for apartment buildings only)	Barrier-free design	Optional
Variability (for multi-family residences only)	Facilitates future changes in floor plans, etc.	Optional

4. Other Requirements:

Renovation work for areas pointed out in the inspection including exterior wall and roof painting, exterior wall and roof replacement, and rain gutter replacement.

Conducting Inspections: A current condition inspection by a specialist must be conducted before starting renovation work.​

Creating a Maintenance Plan and Renovation History: Develop a maintenance plan after renovation and create and preserve a history of the work.

For detailed conditions and procedures, please check the official website of the Ministry of Land, Infrastructure, Transport and Tourism.

Support Program for Insulation Renovation of Existing Homes

Overview of the System and Target Construction Categories

Program Name: Support Program for Insulation Renovation of Existing Homes (Ministry of the Environment Subsidy, executed by the Hokkaido Environmental Foundation)

This program allows you to choose one of two plans: “Total Insulation” for insulating the entire house, or “Living Room Only Insulation” for focusing on the insulation of the living room windows. Choose one of the two plans.

Eligible Participants

Single-family Homes: Individual owners or those who plan to own in the future.

Multi-family Residences (condominiums):

Individual Application: Owner or representative of the management association.

Overall Application: Representative composed of the management association or owners of the entire building, etc.

Subsidy Amount

Subsidy Rate: Up to 1/3 of eligible expenses

Maximum Subsidy Amount (per dwelling): Up to 150,000 yen

Eligible Products and Construction Conditions

Eligible products must be registered with the secretariat as eligible products, including high-performance building materials (insulation, windows, glass, etc.), with an expected energy-saving effect of 15% or more.

For insulation only in the living room, it is mandatory to “renovate all windows in the living room,” and the methods eligible are “roof overlay (cover method),” “inner windows,” and “outer window replacement.”

For detailed conditions and procedures, please check this website.

Leave your exterior wall cover work to Kakeru Koumuten Co., Ltd., the exterior renovation specialists!

This concludes the information on the exterior wall cover method.

Exterior renovations that significantly improve insulation and provide a stylish look like new construction are limited to exterior wall siding work.
While the cost is higher compared to exterior painting, it offers various benefits and is a recommended exterior renovation.
Importantly, if you are considering exterior wall cover work, be sure to obtain estimates from at least three companies!

Our company specializes in exterior renovations, so if you have any concerns regarding roofs, rain gutters, or exterior walls, please consult Kakeru Koumuten Co., Ltd.!

From temporary scaffolding work to roof construction and exterior wall renovation, we carry out all work with our own team. We are confident that our costs, quality, and efficiency in exterior work surpass those of other companies!
We welcome competitive estimates with confidence!
You will be glad you chose us! We take every request seriously to ensure you feel that way.
Estimates and inspections are free!

If our construction plan is inferior to that of other companies, please feel free to decline!
Rest assured, we do not charge any cancellation fees or travel expenses!

We look forward to your inquiries. Thank you very much.

We welcome consultations via LINE as well◎

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!