Aoba-ku, Yokohama If you are looking for an exterior siding contractor, contact Kakeru Koumuten

Kakeru Koumuten is based in Yokohama and has handled many exterior covering projects!

The major benefits of exterior covering work are the following three points!
“Improved insulation”
“High durability with solid guarantees for peace of mind”
“Beautiful finish like a new building that cannot be achieved with exterior painting”

Exterior covering work is gaining attention year by year.
Here, we will also introduce case studies, benefits, points to note, and costs!

Estimates and consultations are free!
We welcome competitive estimates!

What is the exterior covering method?

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

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

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

Why is the exterior covering method so popular?

Here are the “5 points” that make Kakeru Koumuten’s exterior covering method well-received!

Point 1 Super high durability!!

Metal siding offers an overwhelmingly high expected durability compared to exterior wall painting.
Made of Galvalume steel, SGL steel, and aluminum, there are various types of metal siding, but 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 wall cover method has integrated insulation material.
Moreover, by installing battens before the metal siding installation to create a ventilation layer, the insulation performance is 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 wall painting, manufacturer warranties are generally not included.
Metal siding comes with solid manufacturer warranties such as coating and perforation guarantees, providing a high sense of security 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 performance!

Point 5 Enhanced Aesthetics!!

Various designs such as wood grain and tile patterns

Metal siding allows for a finish that resembles new construction, which is impossible to achieve with exterior painting.
There are various designs available, ranging from simple styles to tile-like and wood grain patterns.
You can choose from a variety of designs to match the atmosphere of your building and your personal preferences!
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 to Watch Out for When Performing Exterior Cover Work with Metal Siding?

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

Caution 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 occurrence of problems.
Since there is often a wide range of estimates, to ensure a satisfactory project, if you are considering the exterior cover method with metal siding, be sure to obtain estimates from three or more companies and carefully review the details!

Caution 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 specialist repair contractor!

Caution 3 Long Construction Period

Exterior cover work can be considered one of the most extensive renovations in exterior remodeling.
While exterior painting typically takes about 2 to 3 weeks, exterior 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 drawbacks.

Examples of Exterior Cover Work

BEFORE

AFTER

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 metal siding as the estimates from other companies.

Proposal Details
We have proposed a roof overlay method using metal siding as per your request.
Since you had several preferred metal sidings, we have created separate estimates for each!

You entrusted us with the metal siding “Aijii Industry/SF-Gal Stage Shine”!
The above siding is made of Galvalume steel with heat-insulating fluorine coating, and it is integrated with insulation material, providing excellent thermal insulation.
You mentioned that you obtained estimates from three companies, and you chose us because our costs were lower and our explanations were thorough!

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 (Aijii Industry/SF-Gal Stage Shine)
 Material: Galvalume steel with heat-insulating fluorine coating
 In-house warranty: 10 years
 Manufacturer warranty: 10 years for fading, 10 years for rust, 10 years for perforation
 Furring strips: Made of resin

1. Painting of Accessory Parts

We will first paint the areas not covered by wall siding (eaves, gables, fascia, etc.). To match the durability of the siding, we recommend using high-durability paints such as inorganic or fluorine types.

2. Removal of Equipment

We temporarily remove items that may obstruct the siding, such as rain gutters and air conditioning ducts.

3. Substrate Adjustment

If there is significant deterioration, we will perform joint sealing and adjust the substrate if the exterior wall is warped.

4. Waterproof Paper Installation (may not be necessary)

We will apply a highly breathable moisture-permeable sheet over the entire exterior wall. If the building is over 25 years old or shows significant deterioration, we recommend installing a waterproof sheet, but if there are no issues, we may proceed without it.

5. Installation of Battens

We will install battens over the entire exterior wall. The battens will be fixed at intervals of 455 mm, and we will install wider boards around the windows. If the siding to be used is horizontal, the battens will be installed vertically, and if it is vertical siding, the battens will be installed horizontally.

6. Metal Work for Fittings

We will process and install corner bases, end caps, and foundation water-cutting metal.

7. Main Construction

Finally, we will cut the siding and secure it with screws from the bottom up. Once the siding installation is complete, we will install joint covers and corners. We use stainless steel screws for fastening the siding materials!

8. Sealing at Various Locations

We will apply sealing to areas that require waterproofing. For sealing materials, we recommend using high-durability sealants like Auton Exceed or SR Seal H100, which can expect nearly 30 years of durability if the colors match.

9. Reinstallation of Equipment

We will reinstall the removed rain gutters and air conditioning ducts. If the rain gutter brackets are of the driven type, we may change them to the screw type.

10. Completion

Finally, we will conduct cleaning and a final review to complete the project.

About the Costs of Exterior Wall Covering Work

This is a guideline table for the costs associated with exterior wall cover work.
It serves as a cost estimate for performing the exterior wall overlay (cover method) on a building with a floor area of 30 tsubo.

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

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

The amount will vary depending on the number of attached parts to be painted, the number of windows, and the equipment to be removed or installed.
Please note that this is just a guideline amount, and detailed estimates are completely free, so feel free to contact us.

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 estimates is to always obtain multiple estimates!

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

1. Check the contents and materials of the estimate

2. Confirm the existence of guarantees and aftercare

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

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

By confirming the above four points, you will be able to choose a reliable 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 needs?

Check if 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 it proposed with an appropriate construction method?

When performing exterior wall cover work, it is necessary to create a ventilation layer between the existing exterior wall and the new exterior wall material using a method called “ventilation method.”
If you apply it directly without creating a ventilation layer, moisture cannot escape, which can lead to mold, corrosion, or peeling and lifting of the exterior wall material.
Check whether the proposed work is appropriate!

・Are the quantities and construction details described in detail?

If the description is vague, such as “exterior wall cover work 1 set,” it will be difficult to understand the construction method and what the costs are for, making it hard to compare estimates.
Having clear unit prices and quantities for items like foundation water drainage and edge trim will provide peace of mind and help prevent issues.
If there are items of concern that are not included in the estimate, check the reason for their exclusion!

・Check the auxiliary materials to be used!

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

2. Confirm the existence of guarantees and aftercare

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 types of exterior renovations, so in addition to checking for manufacturer warranties, also confirm whether the contractor offers their own warranty!
If the contractor has a warranty period, they may provide free repairs within that period.

The warranty period varies by contractor and the specifics of the work, but a 5 to 10-year period is common.

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

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

About Kakeru Koumuten Co., Ltd. Warranty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 contractor performs exterior wall cover work in-house

There are differences in costs between companies that handle in-house construction and those that outsource to external companies, and there is a higher likelihood of issues arising from miscommunication with external contractors.

Additionally, if problems occur after construction, responses may be delayed, or there may be no dealings with the external construction company, leading to further complications.
Being able to respond immediately in case of issues is one of the reasons why companies that perform in-house construction are recommended!

About Kakeru Koumuten

Kakeru Koumuten Co., Ltd. is a remodeling company based in Aoba-ku, Yokohama, Kanagawa Prefecture, specializing in roofing, exterior wall work, and scaffolding with complete in-house construction.
By assembling temporary scaffolding and performing exterior wall cover work in-house,
we can provide high-quality work at reduced costs.

Company Introduction

横浜市青葉区のショールーム

 

第一資材置き場

Kakeru Koumuten First Material StorageKakeru Koumuten
● We store scaffolding materials!
Since we can install temporary scaffolding ourselves, we can provide high-quality exterior renovations at a lower cost!

第二資材置き場

Kakeru Koumuten Second Material Storage
● We store materials and tools related to exterior construction and painting!
We also store tools and materials for the exterior wall cover method!

Company Overview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.

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

Aoba-ku, YokohamaArea List

Aoba-ku, Yokohama Akibacho / Aoba-ku, Yokohama Kagetoricho / Aoba-ku, Yokohama Kashiocho / Aoba-ku, Yokohama Kamikashiocho / Aoba-ku, Yokohama Kamikuratacho / Aoba-ku, Yokohama Kamino / Aoba-ku, Yokohama Kamiyabemachi / Aoba-ku, Yokohama Kawakami / Aoba-ku, Yokohama Kumiizawa / Aoba-ku, Yokohama Kumiizawa / Aoba-ku, Yokohama Kosuzumecho / Aoba-ku, Yokohama Shinanomachi / Aoba-ku, Yokohama Shimokuratacho / Aoba-ku, Yokohama Totsukacho / Aoba-ku, Yokohama Torigaoka / Aoba-ku, Yokohama Naze / Aoba-ku, Yokohama Harajuku / Aoba-ku, Yokohama Higashimatano / Aoba-ku, Yokohama Hiradacho / Aoba-ku, Yokohama Hirado / Aoba-ku, Yokohama Fukaya / Aoba-ku, Yokohama Maiokacho / Aoba-ku, Yokohama Maedacho / Aoba-ku, Yokohama Matano / Aoba-ku, Yokohama Minamaioka / Aoba-ku, Yokohama Yabemachi / Aoba-ku, Yokohama Yoshidacho

Possible Subsidies and Grants in Aoba-ku, YokohamaSubsidies and Grants

The following subsidies may be available in Aoba-ku, Yokohama.

Yokohama City’s “Fiscal Year 2024 Energy-Saving Housing Relocation Subsidy Program (Renovation Type)”

Renovation Type Requirements

  1. Eligible Housing

    • To carry out renovations that improve the energy-saving performance of existing homes (single-family and multi-family residences)
    • To ensure that the renovated home achieves energy-saving performance of ZEH standard or higher
  2. Eligible Participants

    • Households with children (households with children under 18) or young couples (where at least one spouse is under 40)
  3. Eligible Works

    • Insulation renovations (exterior walls, roofs, floors, windows, etc.)
    • Installation of high-efficiency equipment (energy-saving water heaters, solar power generation, etc.)

Subsidy Rate and Maximum Subsidy Amount

Type Subsidy Rate Maximum Subsidy Amount
Single-family homes 1/3 1,000,000 yen
Multi-family residences (apartments) 1/3 500,000 yen

*The subsidy applies to up to 1/3 of the renovation costs that meet energy-saving standards

Points for Receiving Subsidies

  • You need to apply to the city of Yokohama in advance andpass the review
  • Renovations to improve the insulation performance of homes are essential
  • Proof of energy-saving performance (such as energy consumption performance calculation documents) is required

For more details, please check the official website of Yokohama City.

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

This concludes the information about the exterior wall cover method.

Exterior renovations that significantly improve insulation and provide a stylish look like a new build are limited to exterior wall siding work.
While the cost is higher compared to exterior wall painting, there are various benefits, making it a recommended exterior renovation.
Importantly, if you are considering exterior wall cover work, it is essential toobtain 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 in Yokohama!

From temporary scaffolding work to roof work and exterior wall renovation, we carry out everything with our own staff. We are confident that our costs, quality, and organization for exterior work are unmatched!
We welcome competitive estimates!
You will be glad you chose us! We take every request seriously to ensure your satisfaction.
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.

Consultations via LINE are also very welcome◎

LINE

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We are also updating our Instagram regularly◎ Please follow us◎

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神奈川で屋根・雨樋・外装の工事、修理なら
株式会社翔工務店へ

株式会社翔工務店は平均年齢20代後半の若い会社ですが、技術はどこにも負けていません。

いちばんの強みは、足場工事、屋根工事、塗装工事とすべて自社で行えること。一般には分業されるこの業界にあって、一式で頼めるので管理に手間がかからず、コストも抑えることが出来ます。何より、トラブルがあればすぐにかけつけます!

自信をもって、宣言できます。私たちは、神奈川で一番若くて親切なリフォーム屋です!