[Kanazawa-ku, Yokohama] | Exterior Painting | We performed painting of plaster exterior walls and rooftop waterproofing work!

BEFORE

AFTER

Hello!
We are Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior painting, and exterior renovations located in Aoba-ku, Yokohama, Kanagawa Prefecture!
This is a case study of exterior renovations in Kanazawa-ku, Yokohama.
The work this time includes rooftop urethane waterproofing and exterior painting.

On this page, we will explain the actual results of the work carried out by Kakeru Koumuten! Thank you very much for choosing Kakeru Koumuten!

Construction Data for Residence R in Kanazawa-ku, Yokohama

Roof Urethane Waterproofing Construction (Vapor Barrier Method) Procedure

1. High Pressure Washing

First, we will clean everything thoroughly with high-pressure washing! If we apply paint over dirt, it will peel off quickly, so we wash away the dirt to improve adhesion. We will be careful while washing, 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. Surface Preparation

We will clean any remaining dirt that could not be removed during washing.

3. Primer Application (First Coat)

Since the existing waterproofing is made of PVC sheet, we used a specialized primer for sheet waterproofing. The type of primer varies depending on the substrate and the new waterproofing material, so be sure to use the appropriate primer!

4. Ventilation Sheet Installation & Joint Tape Application

We will install the ventilation sheet across the entire flat area to prevent wrinkles and air pockets. Joint tape will be applied seamlessly at the joints. The sheets used are called ventilation sheets. By installing the ventilation sheet, we allow air rising from the building to escape outside, preventing the most common waterproofing issue: blistering.

5. Installation of Ventilation Pipe

This is a tube for exhausting water vapor that occurs between the waterproof layer and the substrate on the roof.
The vent pipe is securely fixed to prevent movement. The number of installations varies depending on the size.

6. First Layer of Polyurethane Base Material

Apply evenly and flatly.
Also, for vertical rises, use a dedicated polyurethane base material.

7. Second Layer of Polyurethane Base Material

Apply in the same manner as the first layer. Ensure a proper thickness of the membrane around the drains, vertical rises, and vent pipes.

8. Application of Top Coat

serves to protect the urethane main agent. It protects against friction and dirt when walking or moving around. The top coat is typically applied in two layers!
Once the application is complete, we check for any missed spots.

9. Completion of Rooftop Urethane Waterproofing Work

Once it dries, the work is complete! We return everything to its original place and finish up!

What is the Ventilated Cushion Method?

The Ventilated Cushion Method is the optimal technique for waterproofing on rooftops or balconies with existing concrete substrates, to mitigate the phenomenon of moisture forming and causing swelling inside the applied waterproof material.

Additionally, the Ventilated Cushion Method is suitable for rooftops or balconies where leaks have already occurred!

If waterproofing work is done using the adhesion method instead of the Ventilated Cushion Method on a concrete substrate, the steam emitted from the concrete can cause swelling in the waterproof layer from the inside.

To prevent this swelling, the Ventilated Cushion Method utilizes essential ventilated performance ventilated cushion sheets and ventilation tubes, allowing water vapor to escape to the outside, ensuring stable construction without swelling!

Exterior Wall Painting Work Procedure

1. High-Pressure Washing

Through high-pressure washing of the exterior walls, we thoroughly remove dirt and moss! The roof also had accumulated dirt and moss, so we cleaned it up with high-pressure washing!

2. Protection of Various Parts and Crack Repairs

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 we neglect the protection, gaps may form, allowing paint to seep in, or we may not achieve clean lines. We will also repair any cracks!

3. Primer

This is the first step of applying paint after high-pressure washing and substrate treatment, and it is the paint that ensures that the middle and top coats adhere well to the surface. Since this is for painting a plaster wall exterior, we are using a highly breathable cationic sealer as the primer!

4. Middle Coat

This is an important process to bring out the performance of the paint, to achieve a beautiful finish, and to eliminate unevenness in the application!

5. Top Coat

This is the finishing touch for the exterior wall painting. We will ensure that there are no uneven areas or missed spots, aiming for a beautiful finish! The paint used is from SK Kaken / Art Fresh! Art Fresh is a repair paint specifically for Jolly Pat. Elastic paints and glossy paints are not recommended as they can cause blistering and peeling.

SK Kaken / Art Fresh

6. Painting of Auxiliary Parts (Rain Gutter, Water Cutting, Eaves Ceiling)

Rain Gutter

Water Cutting

Eaves Ceiling

We will thoroughly paint every detail that can be painted! We use rust prevention for the primer on iron parts. [/chat]

For waterproofing and exterior painting work in Kanazawa-ku, Yokohama, trust Kakeru Koumuten!

Our company is based in Aoba-ku, Yokohama, but we also have extensive experience in waterproofing and exterior painting renovations throughout Yokohama.
We are happy to assist with not only waterproofing and exterior painting but also partial painting for other projects.

Since we have a materials storage site and a showroom in Aoba-ku, we can provide reliable exterior renovations while keeping transportation costs low!
If you have any questions or concerns, such as “I just want to know the estimate for painting” or “I want to know about the paint suitable for my home,” please feel free to contact us!

Additionally, Kakeru Koumuten also offers exterior wall cleaning! We can handle not only exterior wall cleaning but also cleaning of exteriors and concrete floors.
Exterior wall cleaning can be done without scaffolding.
Depending on the existing condition, it is often possible to restore the appearance with just cleaning without painting. Please feel free to consult us about cleaning as well.

⇩For more details about the costs of Kakeru Koumuten’s exterior wall cleaning, please check here⇩

We also have pricing plans for exterior painting work, so please take a look if you’re interested!

外壁塗装についてのお役立ち情報

・Exterior Painting and Sealing Work Price List
・DIY Painting Plan | For those who want to try painting the roof and exterior walls themselves! We will only set up the scaffolding!
・Latest! Subsidies and Grants in Yokohama, Kanagawa Prefecture | About the Reduction System

Summary

This concludes the rooftop urethane waterproofing work and exterior painting work in Kanazawa-ku, Yokohama!

Rooftop waterproofing, when deteriorated, can often lead to leaks. If work is required after a leak occurs, additional costs may arise, so it is important to perform maintenance thoroughly before leaks happen!

In the case of PVC sheet waterproofing, as it ages, blisters and wrinkles can occur at the rising parts.
If you notice signs of deterioration, consider renovation!

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 Aoba-ku, Yokohama!

Kakeru Koumuten is a renovation company strong in exterior renovations, and we carry out complete in-house construction from temporary scaffolding work to roof work and exterior painting work.
We are confident that in terms of “cost, quality, and efficiency”, we do not fall behind compared to other companies!

We are confident in our exterior renovations, so competitive estimates are also welcome!
We offer robust construction guarantees and aftercare maintenance, and we have received positive feedback for our appropriate proposals that match the 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.

Helpful information about exterior renovations can be found here!

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