Construction example

【Kohoku-ku, Yokohama】|Exterior Renovation|We performed waterproofing work (top coat) on the rooftop of a 15-year-old apartment, as well as renovation work on the steel staircase and shared corridor!

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AFTER

Minato-ku, Yokohama | Construction Data

 お問い合わせください Approximately 500,000 yen Construction Period Approximately 1 week Completion Month May 2025 Inquiry Details We received an inquiry from a repeat customer stating, “The apartment in Kohoku Ward has been over 15 years old, and although the house manufacturer proposed waterproofing work, it was expensive. I would like to consider the estimate from Kakeru Koumuten as well.”

Roof Rubber Sheet Waterproofing Construction Procedure

1. High-Pressure Washing

First, we will clean the surface with high-pressure washing! If we apply the coating over dirt, it will peel off immediately, so we wash away the dirt to improve adhesion. We must be careful as excessive pressure can damage the existing waterproof layer, so we will wash it carefully!

If there are any obstacles to the waterproofing work, such as outdoor units, we will move or lift them.

2. Protection and Base Adjustment

To improve the adhesion of the top coat, we will perform a surface roughening process. By intentionally creating fine scratches on the surface of the substrate, we enhance the paint’s grip (adhesion). For example, when the application surface is smooth and flat like glass, compared to a surface with slight irregularities, the latter allows the new paint to adhere more easily. When applying the top coat, we generally carry out this surface preparation work.

3. Top Coat Application

The top coat is generally applied in two layers! Once finished, we check for any missed spots.

5. Completion of Rooftop Rubber Sheet Waterproofing Work

The work is complete once the top coat has dried!

The top coat material used this time is Suzuka Fine / HP Silicone Top P!

Shared Corridor Renovation Construction Procedure (Polyurethane Waterproofing Work)

1. High-Pressure Cleaning

First, we will clean thoroughly using high-pressure washing! We will be careful as excessive pressure can damage the existing waterproof layer! We will move or elevate any obstacles, such as outdoor units, that may interfere with the waterproofing work.

2. Substrate Adjustment (Cation Repair)

Next, we will apply cation over the entire area to enhance strength!

3. Primer Application

Next, we will apply polyurethane waterproofing material to the upstanding parts. Since the waterproofing material needs to be thick to achieve effective waterproofing, we will apply it twice to ensure the thickness!

The paint used is Kaken Material / Saracene P.

4. Polyurethane Application (1st Layer)

We will apply it in the same manner as the first layer. We will ensure to apply a sufficient thickness around the drains and upstanding areas.

The polyurethane waterproofing material used is AGC Polymer Construction Materials / Saracene A!

5. Polyurethane Application (2nd Layer)

We will apply AGC Polymer Construction Materials / Saracene A in the same manner as the first layer.

5. Topcoat Application

Finally, we apply the topcoat material Kaken Material / Saracene T. This serves to protect the main urethane component. It protects against friction when walking and guards against dirt and other contaminants.

The topcoat is typically applied in two layers! After finishing the application, we check for any missed spots.

6. Completion of Common Corridor Renovation Work (Urethane Waterproofing Work)

Once the topcoat material is dry, the work is complete!

Steel Stair Renovation Work Procedure (Steel Painting Work)

1. High-Pressure Washing

First, we thoroughly remove dirt and moss from the roof using high-pressure washing!

2. Sealing of Long Sheet Edges and Substrate Adjustment

After the high-pressure washing is completed, we will perform sealing work on the edges of the long sheet using Takiron Matex / Takiseal, and while checking the deterioration of the painting area, we will adjust the substrate using tools like scrapers and sanders. We will also remove any rust!

3. Protection of Each Area

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

4. Primer (Rust Prevention)


Before applying the primer (rust prevention), we will apply Astec Paint / Rust Treatment.

Rust Treatment prevents the reoccurrence of rust through “encapsulation.” If stubborn rust is present on structures like steel stairs, applying Rust Treatment before the rust prevention can help prevent rust from returning.

After applying Rust Treatment, we will then apply the primer (rust prevention) Lock Paint / Sabi Cut.

5. Intermediate Coating

Next, we will perform the middle coating work! This is an important process to bring out the performance of the paint, achieve a beautiful finish, and eliminate uneven application!

The paint used is Rock Paint / Hyper Yumelock.

6. Top Coating

Next is the top coating. This is the finishing touch for the exterior wall painting. We will be mindful to ensure there are no uneven areas or missed spots, achieving a beautiful finish!

In this painting of metal parts, we are applying a total of four coats! The paint used is the same as the middle coating, Rock Paint / Hyper Yumelock.

You can view other painting and waterproofing project results here!

If you are looking for exterior remodeling in Kohoku-ku, Yokohama, please contact Kakeru Koumuten Co., Ltd.

Our company is based in Aoba-ku, Yokohama, but we also have numerous project results in Kohoku-ku, Yokohama. We are happy to assist with partial roof repairs such as roof overlays, roof replacements, exterior wall and roof painting, exterior wall replacements, and leak repairs, as well as other repairs!

In urgent cases such as leak repairs, we may also be able to provide emergency measures without scaffolding, so please consult with us!

I want it to last long with one remodeling”, “I want to keep costs down as much as possible”, “I want to improve insulation performance because the indoors are hot, we will provide optimal solutions for your specific requests.

We carry out everything from temporary scaffolding work to roof work and exterior wall painting completely in-house.
We are confident that we will not be outdone in terms of cost, quality, and organization compared to other companies in exterior work!
We welcome competitive estimates with confidence!

Exterior Renovation Service Areas

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

List of Areas in Kohoku-ku, Yokohama

Kikuna, Kohoku-ku, Yokohama / Kishinecho, Kohoku-ku, Yokohama / Kozukuecho, Kohoku-ku, Yokohama / Shinoharakita, Kohoku-ku, Yokohama / Shinoharadai, Kohoku-ku, Yokohama / Shinoharacho, Kohoku-ku, Yokohama / Shinoharanishimachi, Kohoku-ku, Yokohama / Shinohara Higashi, Kohoku-ku, Yokohama / Shimodacho, Kohoku-ku, Yokohama / Shin-Yokohama, Kohoku-ku, Yokohama / Shin-Yoshida, Kohoku-ku, Yokohama / Takadacho, Kohoku-ku, Yokohama / Tarumachi, Kohoku-ku, Yokohama / Tsunashima Kamimachi, Kohoku-ku, Yokohama / Tsunashima Dai, Kohoku-ku, Yokohama / Tsunashima Nishi, Kohoku-ku, Yokohama / Tsunashima Higashi, Kohoku-ku, Yokohama / Toriyamacho, Kohoku-ku, Yokohama / Nakatehara, Kohoku-ku, Yokohama / Nishinakaoka, Kohoku-ku, Yokohama / Shin-Hane, Kohoku-ku, Yokohama / Hiyoshi, Kohoku-ku, Yokohama / Hiyoshi Honcho, Kohoku-ku, Yokohama / Fujizuka, Kohoku-ku, Yokohama / Mameidocho, Kohoku-ku, Yokohama / Minowa, Kohoku-ku, Yokohama / Morioka, Kohoku-ku, Yokohama / Ozone, Kohoku-ku, Yokohama / Ozone Dai, Kohoku-ku, Yokohama / Takada Higashi, Kohoku-ku, Yokohama / Takada Nishi, Kohoku-ku, Yokohama / Shin-Yoshida Higashi, Kohoku-ku, Yokohama / Kita-Shin-Yokohama, Kohoku-ku, Yokohama / Okurayama, Kohoku-ku, Yokohama

Summary

Estimates and inspections are, of course, free! If you have any concerns regarding roofs, rain gutters, exteriors, or exterior structures, please consult Kakeru Koumuten Co., Ltd. in Kanagawa Prefecture!

Kakeru Koumuten is a company strong in exterior renovations. From temporary scaffolding work to roof work and exterior painting work all done in-house! We are confident that our “cost, quality, and efficiency” are unmatched compared to other companies!

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

“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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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!