[Latest Edition 2026] Stylish Roof Construction, Exterior Painting, and Exterior Renovation Design Collection!

Exterior renovations are something you might do once or at most three times in a lifetime.

Once the work is done, it cannot be redone, which leads many people to struggle with deciding on designs and colors for exterior painting.

Many people may have similar concerns when it comes to exterior wall painting or metal siding.

To conclude, the important thing for the design and image change in exterior renovations is
“To conduct simulations until you are satisfied”
This is key!

In this article, we will introduce recommended color schemes and examples of simulations when decorative accents are applied.

Our company will create simulations until you are completely satisfied!
Kakeru Koumuten Co., Ltd. is a fully in-house construction company that handles everything from setting up temporary scaffolding to exterior wall painting and roofing work.
We promise high-quality, cost-effective, and aesthetically pleasing exterior renovations!

Exterior Renovation Examples & Design Collection

We will introduce various colors and designs for exterior renovations!
These are actual cases proposed to customers by Kakeru Koumuten Co., Ltd.!

1. Exterior renovation design for a mortared exterior wall detached house

This is an existing exterior wall of a 35-year-old house made of mortar!

1-1 Single Color Exterior Wall Painting Color Simulation

The above is a color simulation of exterior wall painting based on the actual building, featuring “One Color for the Exterior Wall”“One Color for the Accessories” with 12 different patterns!
All colors shown in the color samples can be simulated!

Standard: ■1.White × Brown / ■2. Light Beige × Brown

Standard: ■3. Ivory × Mocha Brown / ■4. Light Gray × Charcoal

Modern: ■5. Black × Charcoal Gray / ■6. Dark Gray × Light Gray

Modern: ■7. Black × Charcoal Gray / ■8. Dark Gray × Light Gray

Natural■9. Cream Beige × Brown / ■10. Café au Lait × Dark Brown

Natural■11. Light Beige × Teak Brown / ■12. Ash Beige × Brown

Of course, we can simulate exterior wall painting in various colors beyond those listed above!
If you provide us with your preferred colors or any images you have in mind, we will propose several design options!

1-2. Two-Tone Color Exterior Wall Painting Color Simulation

It is also possible to simulate exterior wall painting with a two-tone color scheme!
We can simulate various designs, such as changing colors only around the balcony or just on the front as an accent!

1-3. Exterior Design When Installing Metal Siding

The above is a simulation of exterior wall covering using metal siding from “IG Kogyo / Galbright II” on the exterior wall!

■Color Variations of Galbright II

Metal siding can be simulated with any siding from the manufacturers listed below!
Just like exterior painting, “two-tone colors” can also be simulated!
●IG Kogyo
●Nichiha
●KMEW
●Asahi Tostem
●YKKAP
and more

1-4. Exterior Design When Decorative Elements Are Added

Not only exterior painting, but also designs and simulations of “exterior decorations” like the following are possible!
●Accent corners
●Louvers
●Gable decorations
●Cornices and decorative boards
●Flower boxes

■Design When Accent Corners Are Installed Design

Accent Corner

The accent corner is available in various designs from manufacturers like Keimyuu and Nichiha.
Just by installing it, it becomes a stylish exterior wall decoration!

■Design when Louvers are Installed

Louvers

Louvers are available in plastic and aluminum, with various colors and designs, and simulations can be done when installed!
Our Machida store has also installed louvers on metal siding!

■In-house Exterior Wall Replacement and Louvers Installed by Kakeru Koumuten Machida Store

It seems that it was originally an izakaya, and after a store renovation, it is now used as the Machida store!

■Design of Gable Decorations when Installed

Gable Decorations

It is also possible to simulate the installation of decorations on the gable part (the peak) of the building or next to the entrance!
Gable decorations can be themed around plants or animals!

■Design of Cornices and Decorative Boards when Installed

Cornices & Decorative Boards

By installing cornices as accents around the mid-wall, window areas, or corners, the overall look becomes more stylish,
and two-tone colors can look even cooler!
If you want a two-tone color scheme, we recommend installing cornices!

■Design of Flower Boxes when Installed

Flower Boxes

They can be installed under the windows! By installing flower boxes that match your desired design, whether Japanese or European style, you can get closer to your ideal appearance!

In addition to the above, various simulations of exterior decorations are possible!

2. Slate Roof and Mortar Exterior House Exterior Renovation Simulation

 
The building above is a 16-year-old house!
The roof is a slate roof (Colonial Quad) and the exterior walls are mortar walls!

2-1. When the exterior walls are covered with metal siding,Simulation　　

■ Galvalume II: Neo White × Cool Black × Mist Ivory

You can realistically simulate with colors to match your preference!
The above is a simulation of the exterior wall covered with metal siding “Aiji Giken/Galvalume II”!

2-2. Simulation when roof overlay work is performedSimulation

■ Simulation when covered with Super Galtect

The above is a
simulation of the cover work for “IG Kogyo/Super Galtect“!
Simulations can be done in various colors!

■Simulation of cover work using classic tiles

The above is a
simulation of the cover method using “Dee’s Roofing/Classic Tile“!

2-3. Simulation of roof and exterior wall cover work with louver installation simulation

■Roof: Super Galtect × Exterior Wall: Galbright II × Louver Installation

By adding louvers as an accent, theluxury feel significantly increases, making it highly recommended!

■Roof: Roman × Exterior Wall: Galbright II × Accent: Louver

The roof is “Deez Roofing/Roman Tuscany”
The exterior wall is “IG Kogyo/Galbright II Cool Black”
This is a simulation with wood grain louver accents!

■Roof: Super Galtect × Exterior Wall: Finestone II × Accent: Louver

The roof is “IG Kogyo/Super Galtect Shade Charcoal”
The exterior wall is “IG Kogyo/Galbright II Cool Black”
This is a simulation with wood grain louver accents!　　　

3. Siding Exterior Wall Detached House Style-Based Design Simulation

Before construction, this is a 18-year-old single-family home with fiber cement siding!

3-1.Modern Style Exterior Renovation Design

Simulation of exterior wall painting in matte black

■Exterior Wall Painting: Charcoal Gray × Accent: Stone Pattern Siding × Entrance Door: Wood Grain

The exterior wall is painted in a dark charcoal color, with stone pattern siding and
a wood grain entrance door as accents!
Changing the lighting to warm tones adds a touch of luxury!

■Exterior Wall Painting: Charcoal Gray × Accent: Wood Grain Siding × Entrance Door: Wood Grain

The main color is charcoal gray for the exterior wall painting, complemented by wood accents using wood grain siding in this modern style design!

　　■Exterior: Charcoal Gray × Accent: Tile Pattern (Brown Tones)

A design pattern with tile-like accents on the exterior walls.

3-2.European Style Exterior Renovation Design

■Exterior Wall: Ivory Tone × Accent: Tile-like (Brown Tone)

The exterior wall is painted in an ivory tone, with a bright brown tile-like siding as an accent in a European style.

■Exterior Wall: Ivory Tone × Tile-like (Black Tone)

The exterior wall is painted in an ivory tone, with a black tile-like siding as an accent in the design.

3-2.European Style Exterior Renovation Design

A popular design with warm and gentle color tones.

■Smoky Pink × Off-White / Veil Beige × Off-White

■Mint Green × Off White / Lavender Gray × Off White

By incorporating pastel colors as accents, you can create a warm atmosphere!
Replacing the gable decorations and entrance lighting can enhance the European feel even more!

3-2.Stylish Style Exterior Renovation Design

It features a simple color scheme and design, yet it has a striking and cool presence!

■Black × Off White / Gray × Off White

■Blue Gray × Off White / Greige × Off White

■Eggplant Color × Off White

A simple yet luxurious design that never gets boring!

3-3.Tropical Style Exterior Renovation Design

■Turquoise Blue Tropical Style

　

3-4.Pink Tones Stylish Exterior Renovation Design

■Smoky Pink × White / Rose Pink × White / Pink Beige × White

Using pink tones as the main color can be too flashy for single-family homes, but
when used effectively as an accent, it creates a warm and stylish exterior!

3-5.Green Tones Stylish Exterior Renovation Design

■ Mint Green × White Two-Tone Color

■ Olive Green × White Two-Tone Color

■ Blue Green × White Two-Tone Color
Green tones provide a gentle impression that evokes nature,
making them a popular color that blends well with the streets!

4. ALC Exterior Wall Detached House Style-Specific Design Simulation

This is a 35-year-old detached house!
The exterior wall is ALC!

4-1.Japanese Modern Style Exterior Design

Introducing a design simulation of a Japanese modern style.

■A calm Japanese modern style

Using matte charcoal gray as the main color for the exterior wall
and dark brown as the accent color, this is a Japanese modern style!
The tiles around the entrance and the wood grain of the eaves add a touch of luxury!

■A stylish Japanese modern style with two-tone colors and wood grain louvers

This Japanese modern style incorporates a two-tone color scheme of beige and dark gray, along with
wood grain louvers as accent decorations!

■A substantial Japanese modern style

This is a substantial Japanese modern style with matte black as the main color and wood grain as an accent!

■An elegant Japanese modern style with white as the main color

The main color of the exterior wall is off-white, with a light brown accent color, creating an elegant Japanese modern style.
By applying stone-like tile siding around the entrance, you can also add a touch of luxury!

4-2. A Stylish Decoration Incorporating European Style

This stylish European style incorporates exterior decorations such as gable ornaments and gate lights!
Just adding one gable ornament can make a significant difference in style!

4-3.Tropical Style Exterior Design

By incorporating white and pastel colors,
it creates a warm tropical design!
The above photo shows a design where tiles were also installed on the approach and the earthen floor!

4-4.Stylish Modern Exterior Design

This design features a stylish and luxurious look with only simple colors!

4-5.European Style Exterior Design

This is a design simulation of 4 patterns in a soft-colored European style!

5. Exterior Renovation Design for Rental Property Siding WallsDesign

This is a rental property with a 25-year-old ceramic siding exterior!

5-1. 6 Patterns of Single Color Exterior PaintDesign

This is a color simulation of 6 patterns of exterior paint with tile-like accent corners!

5-2. 6 Patterns of Two-Tone Exterior PaintDesign

This is a simulation of 6 patterns of two-tone exterior paint with accent corners!

5-3. 6 Patterns of Exterior Design with Siding AccentsDesign

This is a simulation of exterior renovation with wood-grain siding as an accent!

5-4. Six Patterns of Exterior Wall Design with Exterior Painting + Louvers

This is a simulation of 10 patterns of exterior remodeling when louvers are installed as an accent!

6. Exterior Remodeling Design for Rental Apartments

This is a 25-year-old apartment with fiber cement siding!

6-1. Design for Exterior Painting with Two-Tone Colors

Exterior Painting
Navy × Off-White / Greige × Dark Brown / Green × Ivory

Exterior Painting
Off-White × Charcoal Gray / Light Gray × Dark Gray / Beige × Brown

6-2. Design with Metal Siding as an Accent

This is the design when applying
“Aiji Giken/Finestone II k” to the entrance of an apartment!
Even partial application can create a stylish finish!

6-2. Metal Siding × Exterior Painting Design

It is also possible to apply metal siding and perform exterior painting!

7. Design when applying Stone-like Sprayed Exterior Paint

This is a 20-year-old detached house with ALC exterior walls!

■7-1 Design when applying Eleganstone Sprayed Paint

“SK Kaken/Eleganstone” shows four design patterns when sprayed!
It features a luxurious finish that cannot be achieved with roller painting!

8. Exterior Renovation Design for Corporate Office Buildings

This is a 4-story office building for a corporation that is 40 years old!

8-1. Exterior Design When Installing Metal Siding on a Corporate Building

“Aiji Giken/Galbright II” is designed with a vertical two-tone color scheme!
By making part of the front navy, it creates a stylish and cool corporate building!

8-2. Exterior Design When Installing Metal Siding + Louvers

This design features Galbright II in cool navy × neo white metal siding with
silver louvers installed as an accent in four different patterns!

8-3. Exterior Design with Metal Siding and Wood Grain Accents

This modern style incorporates cool black Galbright II as the main color with wood grain siding as an accent!
While metal siding is somewhat costly, it gives the appearance of a new building and
provides a sense of luxury!
It also improves insulation, is highly durable, and is maintenance-free, making it highly recommended!

9. Apartment Exterior Painting Styles Design

This is a 15-year-old apartment with ceramic siding!

9-1. Design of exterior wall painting in a single color 9 patterns

This is a design simulation of exterior wall painting with one color for the accessory parts and one color for the exterior wall!

9-2.Modern Style design for exterior wall painting in two-tone colors

This is a design of six patterns in two-tone colors with a luxurious modern style!
The balcony exterior is an accent color!

9-2.Tropical Style design for exterior wall painting in two-tone colors

Using light colors in white or beige as the main color,
and pastel colors as accents creates a warm tropical design!

9-3.European Style Two-Tone Color Exterior Painting Design

By using a light color as the main color and a darker color as an accent,
it creates a European style design!

10. Roof Painting Simulation is Also Possible!

This is an 18-year-old thick slate roof!

You can realistically simulate your desired color from the color samples!

11. Roof and Exterior Painting Simulation and Case Studies

 As shown in the above photo, we confirmed several simulation patterns with the customer and
performed exterior wall painting with heat-insulating paint on the roof!
We also painted the exterior!
The paints used are as follows!
Exterior wall paint: 「Astek Paint / Fluor REVO1000-IR
Roof paint: 「Astek Paint / Super Shanet Thermo SI
Exterior paint: 「Aica Industry / Jolly Pat Fresh

12. Case Study of Roof Overlay and Two-Tone Exterior Wall Color

This is a 20-year-old detached house!
We painted the exterior walls finished with Joripatto in a two-tone color!
The roof has been covered using the Super Galtect method!
After thorough simulations, we were able to achieve an exterior renovation that matched the customer’s vision!

13. Case Study of Roof Replacement and Solar Panel Installation

We replaced the roof from tiles to “Inagaki Shoji’s Stanby” and installed solar panels!
The solar panels are from “DMM Energy’s Solar Panels“!

14. Case Study of Roof Overlay Work for a Dental Clinic

The existing roof is a slate roof called Colonial NEO, and we performed a roof overlay (cover method) with “Super Galtect” in charcoal!

15. Coating case study for aluminum areas where painting is not possible

Aluminum caps and aluminum sashes are generally not paintable, but it is possible to restore their appearance using Aluminum Coat S!

16. Case study of exterior wall cleaning

Exterior Wall Cleaning Without Scaffolding
Kakeru Koumuten Co., Ltd. offers exterior wall cleaning without the need for scaffolding
! It’s possible!
For buildings that are relatively new and have moss or dirt on the exterior walls, exterior wall cleaning is recommended!
It enhances aesthetics at a low cost,
making it popular for rental properties and apartments!

 

Exterior Design and Simulation by Kakeru Koumuten

Above are the design collection and examples of exterior wall painting, roof work, and exterior renovations by Kakeru Koumuten!
Kakeru Koumuten is committed not only to “high quality and low cost through complete in-house construction”, but also to designs that meet our customers’ needs and requests!

Even if you don’t have a clear design or color in mind, we will propose several recommended simulations tailored to the appearance and location of your building!

We will propose exterior renovations that you can be satisfied with in terms of “cost”, “quality”, and “design”!
We encourage you to obtain estimates from other companies and compare them!
Below, we will introduce Kakeru Koumuten’s “strengths that cannot be imitated by other companies”!

Why is Kakeru Koumuten Chosen for Exterior Renovations?

“Our unique approach in exterior renovations that cannot be imitated by other companies”
has received high praise from many customers.

1.Specialized Equipment for Exterior Renovations

At Kakeru Koumuten, we have prepared the following warehouses and material storage areas to provide high quality at low cost for exterior renovations such as exterior wall painting and roof work.
We have established five bases for material storage and showrooms.

In-house Ownership of Scaffolding Materials

We own the scaffolding materials necessary for exterior wall painting and can assemble the scaffolding ourselves.
By conducting scaffolding work with our own scaffolding team instead of outsourcing, we can also cut costs related to scaffolding work.
We have scaffolding materials for approximately 50 single-family homes!

Storage of materials in our large in-house warehouse

We store roofing materials and paints.
By ordering a large quantity of materials at once, we can procure materials at a lower cost!
Additionally, we always have stock available, allowing us to respond quickly in emergencies!

We are also equipped with various tools, such as compressors and cleaning machines, to handle a wide range of painting work.

In-house waste separation

In exterior work, various waste materials such as paint, wood, and metal are generated.
Most contractors dispose of them all together, but by sorting and recycling waste materials, significant cost reductions in waste disposal can be achieved.

Exterior Renovation Dedicated Showroom

In the showroom, not only can you have meetings, but you can also
directly check actual roofing materials and colors.
You can also perform color simulations for exterior wall painting and check thermal insulation properties using a thermal insulation testing machine!

2.Complete In-House Construction

One of Kakeru Koumuten’s major strengths is complete in-house construction.

By having Kakeru Koumuten handle everything from inquiries to project completion in a consistent manner, we can keep costs down while providing high-quality exterior renovations.
Additionally, one representative will assist you from the estimate to the completion of the work.
Since the person in charge does not change, whether it be the sales representative or the construction manager, smooth communication is possible.

All work, from the installation of temporary scaffolding to exterior wall painting and roof renovations, is carried out by our own skilled craftsmen.

We are confident in our construction plans and costs, so we welcome competitive estimates!

3. Various Permits and Skilled Workers

We have obtained permits for the construction industry and for the collection and transportation of industrial waste!
We also have nationally certified sheet metal workers and painting specialists on staff, giving us confidence in our construction techniques.
We are capable of handling large-scale exterior renovations for factories and apartment complexes as well!

4. Warranty and Aftercare

Exterior painting and roof overlay work come with a warranty!
We offer annual aftercare maintenance, and we send out notification DM each year.
If you have questions about the warranty, please click on the image above!

Check out our aftercare maintenance achievements here!

5. Flexible and Prompt Response

Our company is equipped to handle various exterior troubles and situations.

Even if you cannot access the roof at high places, we can respond using a drone!
During leak investigations, we can also conduct surveys using a thermal imaging camera.

We will respond according to your wishes.
We also accept emergency measures for sudden leaks from the exterior walls!

6. Human Resource Development

We create various models to enhance skills and conduct practical training.
Since exterior renovations vary in construction methods and materials depending on the existing materials and shapes, we regularly provide technical training to ensure that all staff can respond to various sites.

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7. Exterior Renovation Simulation

7-1 Creation of Self-Color Simulation

The simulations created by our company allow for color simulations based on actual photos of your home!
You can also perform simulations on your smartphone or computer.
When trying out a two-tone color, conducting a simulation eliminates the risk of making mistakes!
Of course, we can also arrange paint samples for you to confirm the actual colors!

7-2 Confirming Actual Color and Texture with Sample Painting

You can order samples of the paint you are considering and conduct sample painting on your exterior walls.
By doing a sample painting, you can confirm the actual color and gloss!

7-3 Simulations for Metal Siding, Louvers, and Accent Corners are Also Possible!

For first-time exterior renovations, even if you want to try accents or two-tone colors, you might give up because you can’t visualize it easily.
At Kakeru Koumuten, we can also provide simulations for decorative elements such as metal siding and accent corners!
We can create several recommended design patterns for you as well!

We are confident that we can propose designs that will satisfy you!

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8. We Can Handle Various Exterior Renovations Beyond Wall and Roof Work!

Our company specializes in exterior renovations, so we can also handle projects such as “rain gutter replacement,” “exterior wall siding,” “soffit repair,” “capping replacement,” and “landscaping work”!
We are also able to accommodate partial rain gutter repairs and partial soffit replacements!

9. Clear and Easy-to-Understand Estimates and Documentation!

For customers considering exterior renovations, we provide detailed estimates along with materials such as “reports,” “guides,” and “comparison charts for paints and roofing materials” to help you make a clearer comparison.

The comparison charts categorize paints and roofing materials by rank, allowing you to easily compare total costs and durability at a glance!

Exterior Renovation Construction Procedures (YouTube)

Exterior Wall Painting Construction Procedures

Roof Overlay Construction Procedure