目次
Hamura City, Kanagawa Prefecture | Construction Data
Roof Overlay Construction Procedure
1. Dismantling Existing Metal Sheets
The durability of wooden purlins is about 10 to 15 years. Once the durability period is exceeded, corrosion and discoloration occur, leading to the detachment and scattering of the ridge metal.
2. Installing Roofing (Waterproof Sheet)
This underlayment boasts the highest quality, unmatched in both waterproofing and durability. By sandwiching a modified asphalt layer between non-woven fabric and base paper, it fully demonstrates the inherent performance of modified asphalt. The expected durability is about 30 years!
As a secondary waterproofing measure, if the roofing is properly installed, there will be no leaks! We will ensure it is firmly applied to prevent it from blowing away.
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 roof and the roof slope!
3.Accessory Processing (Curly Patterns and Eaves)
The metal fittings at the ridge are our company’s original integrated waste board ridge base. It has a durability of approximately 30 years and provides high wind resistance.
4. Main Construction (Aijii Industry / Super Galtect)
Once the installation reaches the ridge, we will install the necessary materials to secure the ridge flashing called a “kanban.” We offer three types of kanban: cedar, resin, and Galvalume steel, and this time we used Galvalume steel!
Galvalume steel offers three times the durability compared to cedar! Unlike resin or cedar, it does not crack, providing peace of mind!
Our original integrated waste board ridge base made of Galvalume steel is highly durable, has strong fixation, and excellent wind resistance!
Even if rainwater enters from the ridge, it is designed to discharge rainwater to the outside, demonstrating high waterproof performance!
It is perfect for the Super Galtect ridge base!
5. Ridge Flashing Processing & Sealing at Various Locations
We use rust-resistant stainless steel screws with waterproof washers for secure fastening!
Unlike nails, screws with washers are less likely to pull out
and securely fasten the ridge cap to the underlying board!
Although it’s not visible after installation,
installing a face plate on the inside of the ridge cap
enhances waterproofing!
It effectively protects the critical area of the roof.
6. Cleaning
After the
We will also wipe away any footprints left on the roof to ensure it looks clean.
About Roofing Materials

The roofing material used is Ai-Gi Kogyo / Super Galtect. Super Galtect comes with a 15-year coating warranty and a 25-year hole warranty from the manufacturer, along with a 10-year construction warranty from our company! Additionally, it is made of SGL steel, which is resistant to rust.
The insulation material is tightly applied from edge to edge of the roofing material, creating a metal sheet that integrates the steel plate and insulation. When installed, insulation is applied even to the parts where the roofing materials overlap, and the surface is coated with a high heat-reflective paint, allowing for a cool summer and a warm winter.
Moreover, it also has soundproofing properties, reducing the sound of rain. Being lighter than other roofing materials, it minimizes the sway during earthquakes, providing earthquake resistance.
It excels in finish, durability, insulation, soundproofing, and wind resistance, and our company’s construction achievements show that Ai-Gi Kogyo’s Super Galtect is the most popular, receiving significant attention!
Color
■Shade Black

■Shade Brown

■Shade Blue

■Shade Moss Green

■Shade Charcoal

■New Color Shade Wine Red

You can choose from these 6 colors!
This time, we completed a roof overlay project in Shade Brown, and it turned out very well!
The customer was extremely satisfied, and I was very happy too!
Thank you very much!
| Roof Material |
|
|---|---|
| Manufacturer Warranty | Coating 15 years, Red rust 20 years, Perforation 25 years |
| Expected Durability | About 35 to 40 years |
| Color Used This Time |
|
Please check out other roofing project achievements here!
If you are looking for exterior remodeling in Hamura City, Tokyo, please contact Kakeru Koumuten Co., Ltd.
Our company handles many roofing and exterior painting projects in Hamura City, Tokyo. We are happy to assist with partial roof repairs such as roof overlays, roof replacements, exterior painting, exterior cladding 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 renovation”, “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.
From temporary scaffolding work to roofing and exterior painting, we carry out all work in-house.
We are confident that we will not be outdone in terms of cost, quality, and organization compared to other companies for exterior work!
We welcome competitive estimates with confidence!
Hamura City Area List
Hamura City Kozakudai / Hamura City Kawasaki / Hamura City Gonokami / Hamura City Sakaemachi / Hamura City Shinmeidai / Hamura City Tamagawa / Hamura City Hane / Hamura City Hakami / Hamura City Hanachu / Hamura City Hanehigashi / Hamura City Hanenishi / Hamura City Fujimihira / Hamura City Futabacho / Hamura City Midorigaoka
Long-term Reliability
All roofing materials we use are highly reliable products that come with long-term warranties. For example, the Super Galtect we 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 construction warranty, allowing you to use it with peace of mind for a long time after just one renovation.
Super Galtect is a lightweight roofing material that excels in durability and cost performance, but we also offer roofing materials with even higher durability and better insulation properties, so please feel free to consult us.
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 Kanagawa Prefecture!
Kakeru Koumuten is a company strong in exterior renovations. From temporary scaffolding work to roofing and exterior wall painting workwe handle everything in-house! 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 we welcome competitive estimates! Our construction warranties and aftercare services are robust, 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!
・Leave waterproofing work in Hamura, Tokyo to Kakeru Koumuten Co., Ltd.!
・Leave rain gutter repair and cleaning in Hamura, Tokyo to Kakeru Koumuten Co., Ltd.!
・Leave exterior wall cleaning in Hamura, Tokyo to Kakeru Koumuten Co., Ltd.!
・Leave leak repair in Hamura, Tokyo to Kakeru Koumuten Co., Ltd.!
・Leave solar panel installation work in Hamura, Tokyo to Kakeru Koumuten Co., Ltd.!
・Painting DIY Plan! A must-see for those who want to try DIY roof and exterior wall painting! We will only set up the scaffolding!
・What is the cost range for roof remodeling? Types of work and how to choose a contractor.
・How much does roof work cost? We will introduce the cost range!
・About the cost of roof overlays | Kakeru Koumuten’s roof construction plan!
Consultations via LINE are also very welcome◎
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!



