Construction example

[Kokubunji City, Tokyo]|We carried out roof overlay work on the Danetsu Top in conjunction with the installation of solar panels!

BEFORE

AFTER

Roof Renovation Construction Data, Kokubunji City, Tokyo

Construction Location
 Kokubunji City, Tokyo
Construction Details
 Roof Overlay (Cover Method)
 Temporary Scaffolding Installation
Inquiry Details

We received an inquiry from a customer living in Kokubunji City, stating, “I am considering the installation of solar panels and a roof renovation, and I would like to receive a quote.”

Price Range
 800,000 to 900,000 yen
Construction Period
 Approximately 3 days
Completion Month
 November 2025

Roof Overlay Construction Procedure

1. Demolition of Existing Ridge and Snow Stops

 

We will dismantle the parts that interfere with the

overlay method (ridge flashing)! This time, we will carefully remove the ridge flashing for reuse.

The durability of wooden purlins is about 10 to 15 years. Exceeding the durability period can lead to corrosion and discoloration, resulting in the ridge flashing coming loose or being blown away.

2. Installation of Roofing (Waterproof Sheet)

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

Tadis Self Cover is a roofing sheet that is ideal for the cover method of fragile slate, 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 years 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.Accessory Processing (Kera, Karakusa, Rain Stopper)

Before the main roof construction, we will process and install accessories such as kera, karakusa, and valley metal!
The accessories used will be made of galvalume steel!

4.Accessory Processing (Ridge Base)

Before the main roof construction, we will process and install accessories such as kera, karakusa, and valley metal!
The accessories used will be made of galvalume steel!

We will install the materials necessary to secure the ridge cap. We offer three types of batten: cedar, resin, and galvalume steel, and this time we used the galvalume steel version!
Galvalume steel can be expected to have three times the durability of cedar! Unlike resin or cedar, it does not crack, providing peace of mind!

Our original integrated waste board made of galvalume steel for the ridge base 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. Main Construction (Sekino Kousan/Dannetsu Top)

After processing the components, we will install the main body of the Dannezu Top!

6. Completion

Finally, we will clean the construction area. We will thoroughly clean to prevent injuries from nails and metal scraps.

Once the cleaning is complete, the roof overlay will be finished.

About the Roofing Material

The roofing material used is the Dannezu Top from Sekino Kousan.

Since Dannezu Top is made of Galvalume steel, it has excellent durability, and it comes with a manufacturer’s coating warranty! 15-year coating warranty and 25-year hole warranty are included!

While it looks similar to Hiranbi, Dannezu Top comes with polyethylene foam insulation as a standard feature, not as an option!
Additionally, we provide a 10-year workmanship warranty!

Features of Dannezu Top 8-1

Lightweight and earthquake-resistant, it is a roofing material that combines overwhelming lightness with sturdy fastening, making it strong against earthquakes. It is also easy to install, improving work efficiency.

Moreover, it has heat-insulating GL steel and insulation effects. With high corrosion-resistant GL steel and insulation material, it excels in thermal insulation, soundproofing, and strength.

This time, the overlay work was completed very beautifully!
The customer was very satisfied, and I was also very happy!
Thank you very much!

Please check out other roofing construction achievements here!

For roof renovations in Kokubunji City, Tokyo, trust Kakeru Koumuten!

Our company has extensive experience in roof renovations in Kokubunji City.
We are happy to assist with roof overlay work, roof replacement, leak repairs, and partial roof repairs.
“I just want to know the estimate for the roof renovation” or “I want to know about roofing materials” If you have any questions or concerns, please feel free to contact us!

Long-term Reliability

The roofing materials we use are all reliable products that offer long-term warranties. For example, the Dannezu Top used this time comes with a 15-year coating warranty and a 25-year hole warranty from the manufacturer. We also provide a 10-year workmanship warranty! You can use it with peace of mind for a long time after just one renovation.

Additionally, we can provide aftercare maintenance every year!
We send out aftercare maintenance DM from our company!

List of Areas in Kokubunji City, Tokyo

Kokubunji City, Izumicho / Kokubunji City, Kitamachi / Kokubunji City, Shinmachi / Kokubunji City, Takagimachi / Kokubunji City, Tokura /
Kokubunji City, Naito / Kokubunji City, Namikimachi / Kokubunji City, Nishikoi-gakubo / Kokubunji City, Nishimachi / Kokubunji City, Nishimotocho / Kokubunji City, Hikaru-machi / Kokubunji City, Higashikoi-gakubo / Kokubunji City, Higashitokura / Kokubunji City, Higashimotocho / Kokubunji City, Hiyoshicho / Kokubunji City, Fujimoto / Kokubunji City, Honda / Kokubunji City, Honmachi / Kokubunji City, Minamimachi

Summary

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

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

We are confident in our exterior renovations, so we welcome competitive estimates!
We offer comprehensive 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 also have information on roofing costs and pricing plans for the roof overlay (cover method), so please take a look if you’re interested!

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

Here for helpful information about exterior renovations!

 

LINE consultations are also very welcome◎

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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!