BEFORE

AFTER

Hello! I am Yamanaka from Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior painting, and exterior renovations located in Aoba-ku, Yokohama, Kanagawa Prefecture!

Today, I would like to introduce a case study of an exterior renovationroof overlay (cover method) and joint replacement work that we conducted in Chofu City, Tokyo. We have detailed the price range and construction period, so please refer to this information for your own exterior renovation needs.

Thank you very much for choosing Kakeru Koumuten Co., Ltd. from among many contractors!

Construction Data for Chofu City, Tokyo

Construction Location
 Chofu City, Tokyo
Construction Details
 Temporary Scaffolding Installation
 Roof Overlay (Cover Method)
Existing Materials
 Roof Material: Colonial NEO (Non-Asbestos)
New Materials Used

 Roof Material: Aijii Kogyo / Super Galtect
 Roofing Sheet: Tajima Roofing / Tadi Self Cover
 Nail Board: Galvalume Steel Plate (Our Original Integrated Waste Board)

Sealing material: Auto Chemical Industry / Auton Exceed

Price Range
 800,000 – 900,000
Construction Period
 About 2 weeks
Completion Month
 November 2024
Inquiry Details

A customer residing in Chofu City contacted us to request maintenance due to discoloration of the ridge cap, and we carried out ridge cap metal work.
During the ridge cap metal work, the customer also requested that we check the roof, and upon inspection, we found significant deterioration, so we proposed a roof overlay (cover method) construction.

They mentioned that our prices were affordable and that our staff’s response was good, which led them to entrust us with the roof work as well.

Roof Overlay (Cover Method) Construction Procedure

1. Existing Ridge and Snow Stop Dismantling

We will dismantle unnecessary parts (ridge cap and snow guards) for the roof overlay (cover method)!
The existing ridge base is made of cedar, which has a durability of about 10 to 15 years.

Once the durability period is exceeded, corrosion and discoloration can occur, leading to the detachment and scattering of the ridge cap.

2. Roofing Installation (Waterproof Sheet)

Next, we will install the roofing sheet (waterproof sheet) on top of the base. We used Tajima Roofing / Tadi Self Cover, which is a highly durable and waterproof roofing material.

Tadi Self Cover is the ideal roofing sheet for the cover method of fragile slate materials, such as non-asbestos roofing materials. It serves as a secondary waterproofing layer, and as long as the roofing is solid, it basically won’t leak!

We will securely attach this to prevent it from being blown away by the wind. Since there are various durability periods and characteristics for roofing sheets, it is important to choose a roofing sheet that matches the durability of the new roofing material and the roof slope!

3. Component Processing (Kera, Karakusa, Valley)

Before the main roof construction, we will process and install components such as kera and karakusa. The components used are genuine components from Super Galtect, made of SGL copper plate!

4. Main Construction (Aiji Industry / Super Galtect)

After processing the special parts, we will install the Galttect main body up to the ridge. After processing the special parts, we will install the Galttect main body up to the ridge!
The roofing material will be secured with stainless steel renovation screws!

At the ridge, we will install the necessary ridge substrate to secure the ridge cap. The wood we handle includes cedar, resin, and Galvalume steel, three types, and this time we used Galvalume steel.

Galvalume steel is expected to have three times the durability of cedar, and unlike resin or cedar, it does not crack, providing peace of mind!

Our original integrated waste board Galvalume steel ridge substrate is highly durable, has strong fixing power, and excellent wind resistance! Even if rainwater enters from the ridge, it has a mechanism to discharge rainwater to the outside, demonstrating high waterproofing performance!

5. Processing of Ridge Cap and Sealing at Various Locations

Next, we will process and install the ridge cap. We will firmly apply sealing on the inside of the joints, and at the wall edge, we will process and install a component called rain stop flashing.

The screws used for fixing are stainless steel screws with washers that are resistant to rust!

Pack screws are less likely to come loose compared to nails, securely fastening the ridge cap to the underlying board!

Although it is not visible after installation, adding a face plate inside the ridge cap enhances waterproofing! It effectively protects the critical area of the roof.

5. Cleaning

We will clean up any debris that has fallen onto balconies and other areas. We conduct thorough cleaning to prevent injuries from nails and metal scraps. Additionally, we will wipe away any footprints left on the roof to ensure it looks clean.

About Roofing Materials

The roofing material used is the Super Galtect from Aijii Industrial. The Super Galtect comes with a 15-year paint warranty and a 25-year hole warranty, along with a 10-year installation warranty from our company!

Made of SGL steel plate, it is highly resistant to rust. The insulation material is tightly adhered from edge to edge of the roofing material, creating a metal plate that integrates both the steel plate and insulation.

During installation, insulation is applied even to the areas where the roofing materials overlap, and the surface is coated with a highly heat-reflective paint, allowing for a cool summer and warm winter experience. Additionally, it has soundproofing properties, reducing the sound of rain.

Moreover, it is lighter compared to other roofing materials, which reduces the sway during earthquakes, providing earthquake resistance. It excels in finish, durability, insulation, soundproofing, and wind resistance, and our company has the most installations of Aijii Industrial’s Super Galtect, making it highly regarded!

Color

■Shade Black
Shade Black
■Shade Brown
Shade Brown
■Shade Blue
Shade Blue
■Shade Moss Green
Shade Moss Green
■Shade Charcoal
Shade Charcoal

New Color Shade Wine Red

You can choose from the 6 colors above!

This time, we completed a roof overlay (cover method) using Shade Charcoal, and it turned out very well! The customer was extremely satisfied, and I was very happy as well. Thank you!

Please check out other roof overlay (cover method) construction results here!

Roof Material


IG Kogyo / Super Galtect

Roof Material Color


Shade Charcoal

Shade Charcoal

Leave your roofing work in Chofu City, Tokyo to Kakeru Koumuten!

Our company has a strong track record of projects in Chofu City, Tokyo. We are happy to assist with roof overlay work, roof replacement, and even partial roof repairs such as leak fixes.

“I just want to know the estimate for a roof renovation,” “I want to know about roofing materials,” and any other questions or concerns you may have, please feel free to contact us!

Exterior Renovation Service Areas

Kakeru Koumuten accepts requests throughout Kanagawa Prefecture and all of Tokyo.

Chofu City, Tokyo Area List

Kamiyagyu, Chofu City / Iruma-cho, Chofu City / Kamishihara, Chofu City / Kamifutada-cho, Chofu City / Kikunodai, Chofu City / Kokuryo-cho, Chofu City / Kojima-cho, Chofu City / Sasu-cho, Chofu City / Shibasaki, Chofu City / Shimoishihara, Chofu City / Shimofutada-cho, Chofu City / Fuda, Chofu City / Jindaiji Kitamachi, Chofu City / Jindaiji Higashimachi, Chofu City / Jindaiji Minamimachi, Chofu City / Jindaiji Motomachi, Chofu City / Sengawa-cho, Chofu City / Someji, Chofu City / Tamagawa, Chofu City / Chofu Gaoka, Chofu City / Tobitakyu, Chofu City / Nishitsutsuji Gaoka, Chofu City / Nishimachi, Chofu City / Nomizu, Chofu City / Higashitsutsuji Gaoka, Chofu City / Fujimicho, Chofu City / Fuda, Chofu City / Midorigaoka, Chofu City / Yakumo-dai, Chofu City / Wakabacho, Chofu City

Long-Term Reliability

All the roofing materials we use come from reliable products that offer long-term warranties. For example, the Super Galtect we used this time comes with a 15-year paint warranty and a 25-year hole warranty. Additionally, we provide a 10-year construction warranty! This means you can use it with peace of mind for a long time after just one renovation.

Super Galtect is an excellent roofing material known for its durability, but we also offer roofing materials with even higher durability and better insulation properties.

Summary

This concludes our exterior renovation construction results for the roof overlay (cover method) and joint replacement work in Chofu City, Tokyo.

Roof renovations and exterior wall painting can vary significantly depending on the existing materials, so it is essential to verify that the proposed paint is suitable for the application.

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

Complete in-house construction from temporary scaffolding to roofing and exterior wall painting! We are confident that when it comes to exterior renovation work, we will not be outdone by other companies in terms of “cost, quality, and efficiency!”

We are confident in our services, so we welcome competitive estimates! With robust construction warranties and aftercare maintenance, we have received positive feedback for our cost performance and appropriate proposals that align with 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.

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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!