[Aoba-ku] Exterior Painting & Roof Repair | We performed exterior painting using heat-reflective paint and roof overlay (cover method)!

BEFORE

AFTER

Hello!
We are Kakeru Koumuten Co., Ltd., specialists in roofing, exterior wall painting, and exterior renovations located in Aoba-ku, Yokohama, Kanagawa Prefecture!
This is a case study of an exterior renovation project in Aoba-ku, Yokohama.
The work involved exterior wall painting using heat-reflective paint and a roof overlay method from slate roofing to asphalt shingles.

On this page, we will explain the actual results of the work carried out by Kakeru Koumuten in Aoba-ku, Yokohama!

Thank you very much for choosing Kakeru Koumuten!

Construction Data for Mr. T’s Residence in Aoba-ku, Yokohama

Exterior Painting Construction Procedure in Aoba-ku, Yokohama

1. High-Pressure Washing

First, we thoroughly remove dirt and moss from the exterior walls using high-pressure washing! If dirt remains, it can affect the adhesion and durability of the paint, so we wash carefully.
We also wash the exterior structures, concrete floors, and inside the rain gutters as well.

2. Surface Preparation

After high-pressure washing, we assess the condition of the exterior walls and perform surface preparation such as crack repairs.

3. Masking

Next, we use masking tape, blue sheets, and polymer masks to protect areas that will not be painted, such as windows, sashes, and floors. This is a very important task in the painting process! If masking is not done properly, gaps can form, allowing paint to seep in or resulting in uneven lines.

4. Primer Application

After completing high-pressure washing and surface treatment, we apply the first coat of paint. This primer ensures that the subsequent middle and top coats adhere well to the surface. A thorough primer application greatly impacts durability and finish quality!

The undercoat material used has a substrate adjustment function, which fills in fine cracks and prevents further cracking!
The Epithèque filler used is for repainting and is a primer paint that works well with existing mortar exterior walls.

5. Intermediate Coating

Next is the intermediate coating. This is an important process to bring out the performance of the paint, achieve a beautiful finish, and eliminate uneven application!

6. Top Coating

Next is the top coating. This is the finishing touch for the exterior wall painting. We focus on ensuring there are no uneven spots or missed areas, resulting in a beautiful finish! The paint used isAstec Paint’s Silicon REVO1000-IR. The manufacturer’s expected durability is about 13 to 16 years. It is a heat-insulating paint that keeps the interior cool!

7. Painting of Auxiliary Parts (Canopy Metal, Shutters, Eaves)

Canopy Metal

Shutters

Fascia

The attached parts will undergo surface preparation such as scraping, and for metal parts, we will apply a primer with rust prevention, followed by an intermediate coat and a top coat using Yumelock. We will ensure that every detail is thoroughly painted!

Roof Overlay Construction Procedure

1. Demolition of Existing Ridge and Snow Stops

We will dismantle unnecessary ridge flashings and snow guards for the roof overlay (cover method)!The durability of wooden purlins is approximately 10 to 15 years. Exceeding the durability period can lead to corrosion and discoloration, resulting in the detachment and scattering of ridge flashings.

2. Roofing Installation (Waterproof Sheet)

We will lay the roofing sheet (waterproof sheet) on the base!The roofing used is Tajima Roofing/Tadis Self!
The material is a delayed adhesive modified asphalt roofing, which has high waterproofing and durability, and is said to have double the durability of regular asphalt roofing.
As a primary waterproofing measure, if the roofing is properly installed, there will be no leaks!
We will ensure it is securely adhered to prevent it from blowing away.

3. Fabrication of Accessories (Kera and Karakusa)

Before the main roof construction, we will fabricate and install accessories such as kera and karakusa!
The materials used for the accessories are galvalume steel sheets.

4. Main Construction (Nichihara/Alma)

After the accessory fabrication, we will install the Alma main roofing up to the ridge! We will also ensure that the single cement is properly applied during the installation.
Once we have installed up to the ridge, we will set up the purlin, which is necessary for securing the ridge flashing. There are two types of purlins: cedar and resin, and this time we used a resin type!
The resin type is expected to have twice the durability of the cedar type!

5. Ridge Flashing Fabrication and Sealing at Various Locations

Next, we will process and install the ridge cap. We will thoroughly apply sealing on the inside of the joints. At the wall edge, we will process and install a component called a rain guard metal.
For the ridge cap, we use special packing screws that have high waterproofing properties!

6. Cleaning

We will clean up any debris that has fallen onto the balcony or rain gutters. We will conduct a thorough cleaning to prevent injuries from nails and metal scraps.

About Roofing Materials

The roofing material used is Nichiha’s Aruma.
Aruma comes with a 10-year manufacturer warranty.
Since it uses natural stone that is baked and painted on the surface, it is a roofing material that does not require painting, thus reducing maintenance costs!
Because it uses fine natural stones on the surface, you won’t be troubled by the sound of rain.

It excels in finish, durability, sound insulation, and wind resistance, and is lighter compared to other roofing materials, which reduces the sway during earthquakes, making it a good earthquake countermeasure.
In this overlay (cover) work we performed, the roof becomes double-layered, which increases the weight, but Aruma is a lightweight roofing material, making it suitable for overlay (cover) work.

Colors

■ Black AR

■ Gray AR

■Green AR

■Brown AR

■Camel AR

This time, the roof work with Black AR turned out exceptionally well!
The customer was very satisfied, and I was also very happy!
Thank you very much!

Please check out other roofing work achievements from here!

What is the Roof Overlay (Cover Method)?

The roof overlay method involves leaving the current roof almost intact and placing a new roof on top of it, effectively covering it.
Literally, it is a method of covering a roof with another roof. Therefore, the roof becomes double-layered. Since the roof is laid over itself, it is also referred to as “overlapping roofing.”

Advantages of the Overlay Method

Since a “new roof” is placed over the “current roof,” there is almost no need for demolition work, meaning very little waste is generated.
This is its most significant feature, leading to various advantages.

The only part that requires demolition and waste disposal is the ridge cap, so compared to complete roof replacement, the cost is lower.
In 2004, regulations regarding the concentration of asbestos in raw materials were changed (for more details, please visit the Ministry of Health, Labour and Welfare’s website).
Some building materials used in structures built before 2004 contain asbestos. Asbestos-containing materials are challenging to demolish due to their high environmental impact, and the costs for demolition and waste disposal are also high. The overlay method, which generates almost no waste, is ideal for such roofs.

You may wonder if it is safe to live in a building that uses asbestos-containing materials, but rest assured. As long as there is no destruction or crushing, it will not disperse into the air.
If you are unsure about the type of roof you have, please feel free to consult us.

Additionally, it can be completed in a shorter time frame compared to painting or full replacement. A shorter construction period means lower labor costs, which in turn makes the overall cost lower.
There is also less psychological anxiety about having to live in an unusual environment.
When scaffolding is set up, you may experience inconveniences such as difficulty entering and exiting or being unable to open windows. Being able to return to normal life in a short period is a significant advantage.

Our company specializes in roofing work, and the roof overlay (cover method) is the most frequently performed service we offer. We are very grateful that we are continuously able to carry out roof overlay (cover method) projects without interruption.

Benefits of Simultaneous Roofing Repairs and Exterior Painting

◇Improved Work Efficiency

Simultaneous work means performing exterior painting and roofing repairs together. If you request the work separately, it will require setting up and dismantling scaffolding for each job, which takes extra time and effort.

With simultaneous work, you can eliminate the hassle and time of setting up and dismantling scaffolding. You can complete the project in one go, greatly enhancing the overall work efficiency. If you need both exterior painting and roofing repairs, please consider simultaneous work.

◇Potential Cost Savings

By performing exterior painting and roofing repairs at the same time, one of the benefits is cost reduction. When requesting the work individually, costs for scaffolding setup and labor will arise each time. With simultaneous work, scaffolding setup is only needed once, shortening the overall construction period. This leads to reductions in installation costs and labor expenses. Additionally, some contractors offer discount services, so further cost savings can be expected.

◇Reduction of Stress from Changes in Living Environment

With exterior painting and roofing repairs, your living space will temporarily change, and stress from noise, vibrations, and paint odors is unavoidable. If each job is done separately, it will impact your living environment twice. On the other hand, if both jobs are done simultaneously, the impact on your living environment can be minimized at once, reducing stress. Furthermore, since the construction period is consolidated, interruptions to your daily life can be kept to a minimum.

Paint Used for Exterior Painting

Exterior Painting Paint
Exterior Color	Rain Gutter / Water Cut / Vent Cover / Eaves / Shutters: Yumelock N90 Fascia / Eaves: Yumelock 15-20B

Roofing Materials Used in Roof Repair

Roofing Material	Nichiha / Alma
Manufacturer Warranty	10 years
Expected Durability	About 20 years
Color Used This Time	Black AR

For Exterior Renovation in Aoba-ku, Yokohama, Trust Kakeru Koumuten!

Our company is based in Aoba-ku, Yokohama, and we have extensive experience in exterior wall and roof renovations.
We are happy to assist with partial repairs such as exterior painting, roofing work, waterproofing, and other construction projects.
If you have any questions or concerns, such as “I just want to know the estimate” or “I want to know about paint suitable for my home,” please feel free to contact us!

Community-Focused Service

We are an exterior renovation company located in Aoba-ku, Yokohama, and we have handled many exterior renovations in Aoba-ku, deeply understanding the needs of our local customers. Whether you want to “make it last long with one renovation,” “keep costs as low as possible,” or “do a color simulation for the exterior walls,” we provide optimal solutions for your specific requests.

Summary

Estimates and inspections are, of course, free! If you have any concerns regarding roofs, rain gutters, exterior walls, or exteriors, please consult with Kakeru Koumuten Co., Ltd. in Aoba-ku, Yokohama!

Kakeru Koumuten is a renovation company strong in exterior renovations, and we carry out complete in-house construction from temporary scaffolding to roofing and exterior painting.
We are confident that in terms of “cost, quality, and efficiency”, we will not be outdone by other companies!

We are confident in our exterior renovations, so we welcome competitive estimates!
We offer robust construction guarantees and aftercare maintenance, and we have received positive feedback for our appropriate proposals that align with cost performance and our customers’ future life plans!

“I’m glad I asked them!” We take every request seriously to ensure you feel this way.

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

Useful information about exterior renovations can be found here!

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