If you are looking for an exterior wall siding contractor in Aoba-ku, Yokohama, contact Kakeru Koumuten Co., Ltd.

Kakeru Koumuten Co., Ltd. is based in Yokohama and has handled many exterior wall cover projects!

The major benefits of exterior wall cover projects 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 wall cover projects are gaining attention year by year.
Here, we will also introduce case studies, benefits, precautions, and costs!

Estimates and consultations are free!
We welcome competitive estimates!

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 method that overlays a new exterior wall on top of the existing exterior wall.
It can be applied to various types of exterior walls, including ALC walls, ceramic siding, and mortar walls.
The exterior materials used in the exterior wall cover method are generally lightweight and durable metal siding.

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

Why is the exterior wall cover method so popular?

Here are the “5 points” that make Kakeru Koumuten Co., Ltd.’s exterior wall cover method highly regarded!

Point 1 Super high durability!!

Metal siding offers significantly higher durability compared to exterior painting.
Made of Galvalume steel, SGL steel, and aluminum, there are various 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.
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 exterior painting often comes with in-house warranties from various contractors, manufacturer warranties are generally not included.
Metal siding, however, 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, greatly enhancing waterproofing.
Applying waterproof paper before installation further increases waterproofing!

Point 5 Enhanced 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-like 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 Industry, Keimyuu, Nichiwa, and Asahi Tostem, each offering various 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 points to be cautious about when doing exterior wall cover work with metal siding?

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

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 troubles.
Since there is often a variation in the estimated costs, to ensure a satisfactory construction, if you are considering the exterior wall cover method with metal siding, make sure to get 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 specialized repair contractor!

Caution 3 Long construction period

Exterior wall cover work can be considered the most extensive renovation among exterior remodeling projects.
While exterior painting typically takes about 2 to 3 weeks, the construction period for exterior wall cover work can often approach one 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

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 created separate estimates for each one!

You entrusted us with the “Aijii 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 (Aijii Industry/SF-Gal Stage Shine)
 Material: Galvanized steel with heat-insulating fluorine processing
 In-house warranty: 10 years
 Manufacturer warranty: Fading 10 years, rust 10 years, perforation 10 years
 Furring strips: Made of resin

1. Painting of Additional Parts

We will first paint areas not covered by wall siding (such as eaves, gables, and fascia). 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 455 mm intervals, and we will install wider boards around the windows. If the siding being used is horizontal, the battens will be installed vertically, and if it is vertical siding, the battens will be installed horizontally.

6. Fabrication of Special Metal Parts

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

7. Main Construction

Finally, we will cut the siding material and secure it with screws from the bottom up. Once the installation of the siding is complete, we will attach 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 be expected to last nearly 30 years 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 table of estimated costs for exterior wall cover work.
It serves as a cost estimate for performing the exterior wall cover method on a building with a floor area of 30 tsubo.

The cost of the exterior wall cover work will be determined by the following calculation:
Exterior wall area (㎡) × Siding unit price + Equipment removal and installation cost + Additional painting cost = 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 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 attached parts and windows to be painted, as well as the equipment to be removed and reattached.
Please note that this is just a rough estimate, 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 reliable contractor, such as “where should I request?”
The most important thing when choosing a contractor or getting an estimate 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. Check if the contractor performs the exterior wall cover work in-house

By confirming 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 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 meets 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 exterior wall and the new exterior wall material using a method called “ventilation method“.
If you do not create a ventilation layer and directly apply it, moisture cannot escape, leading to mold or corrosion, and may result in peeling or lifting of the exterior wall material.
Check if the proposed construction is appropriate!

・Are the quantities and construction details described in detail?

If the content 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 lengths 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 will 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 renovations, so in addition to the manufacturer’s warranty, be sure to check if the company offers its own warranty!
If the contractor has a warranty period, they may offer free repairs within that period.

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

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

Kakeru Koumuten Co., Ltd. always provides a warranty for exterior wall cover work.
We also offer after-maintenance services and send out annual DM, so if you wish, inspections can be done 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 get estimates from multiple contractors.

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

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

To request your desired repair contractor at a lower price, obtaining estimates from multiple contractors is essential.
When comparing estimates, be sure to 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 differences in costs between companies that handle in-house construction and those that outsource to external companies, and issues such as miscommunication with external contractors are more likely to occur.

Additionally, if problems arise after construction, responses may be slow, or there may be no dealings with external construction companies, leading to potential troubles.
Being able to respond immediately when something happens 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 work with complete in-house construction.
Since we can assemble temporary scaffolding and perform exterior wall cover work in-house,
we can provide high-quality work at a reduced cost
.

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 set up temporary scaffolding in-house, 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.!

Sakae-ku, YokohamaArea List

Iijima-cho, Sakae-ku, Yokohama / Inuyama-cho, Sakae-ku, Yokohama / Otsuki, Sakae-ku, Yokohama / Kasama-cho, Sakae-ku, Yokohama / Kasama, Sakae-ku, Yokohama / Kajigaya-cho, Sakae-ku, Yokohama / Kajigaya, Sakae-ku, Yokohama / Katsuradai Kita, Sakae-ku, Yokohama / Katsuradai Naka, Sakae-ku, Yokohama / Katsuradai Nishi, Sakae-ku, Yokohama / Katsuradai Higashi, Sakae-ku, Yokohama / Katsuradai Minami, Sakae-ku, Yokohama / Katsura-cho, Sakae-ku, Yokohama / Kanai-cho, Sakae-ku, Yokohama / Kamigo-cho, Sakae-ku, Yokohama / Kamino-cho, Sakae-ku, Yokohama / Kamei-cho, Sakae-ku, Yokohama / Kouta-cho, Sakae-ku, Yokohama / Kosugegaya-cho, Sakae-ku, Yokohama / Kosugegaya, Sakae-ku, Yokohama / Koyamadai, Sakae-ku, Yokohama / Shodō, Sakae-ku, Yokohama / Tayata-cho, Sakae-ku, Yokohama / Nakano-cho, Sakae-ku, Yokohama / Nagao-dai-cho, Sakae-ku, Yokohama / Nagakura-cho, Sakae-ku, Yokohama / Naganuma-cho, Sakae-ku, Yokohama / Nonanazato, Sakae-ku, Yokohama / Kashiyou, Sakae-ku, Yokohama / Higashi Kamigo-cho, Sakae-ku, Yokohama / Hongōdai, Sakae-ku, Yokohama / Motohashi, Sakae-ku, Yokohama / Wakatake-cho, Sakae-ku, Yokohama

Possible Subsidies and Grants in Sakae-ku, Yokohama

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

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

Renovation Type Requirements

  1. Targeted Housing

    • Renovations to improve the energy-saving performance of existing homes (single-family and multi-family residences)
    • Ensuring that the renovated home achieves energy-saving performance of ZEH standards or higher
  2. Targeted Recipients

    • Households with children (households with children under 18 years old) or young couples (either spouse is under 40 years old)
  3. Targeted 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 must apply to Yokohama City in advance and pass the review
  • Renovations to improve the thermal insulation performance of the house 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.

For exterior wall cover work, trust the exterior renovation specialists at Kakeru Koumuten!

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 wall painting, it offers various benefits and is a recommended exterior renovation.
The important thing is that if you are considering exterior wall cover work, you must obtain estimates from at least three different 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!

We carry out everything from temporary scaffolding work to roof work and exterior wall renovation work entirely in-house. We are confident that our costs, quality, and efficiency in exterior work are unmatched compared to other companies!
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!
Please rest assured that 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◎

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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!