Roof Replacement Construction Costs and Plans
For more details about roofing work, click here!
What is Roof Replacement?
This construction involves dismantling the existing roof, installing new underlayment (roofing), and then laying new roofing materials.
Benefits of Roof Replacement
The benefits of roof replacement construction are as follows:
・Weight reduction of the roof
・Improved insulation (when using roofing materials with higher insulation than the existing roof)
・Enhanced wind resistance
・Reduction in maintenance costs
These are the main advantages.
Weight Reduction of the Roof
One of the significant benefits of roof replacement is the reduction in weight.
If the existing roofing material is tile, replacing it with Galvalume steel roofing will reduce the weight of the roof to one-tenth.
Additionally, if the existing roof is slate, a cover method is possible, but since new roofing materials are placed over the existing ones, the roof will inevitably become heavier.
Improved Insulation
When replacing from slate or corrugated metal roofs to highly insulated materials like “Super Galtect” or “Yokodan Roof,” insulation performance significantly improves.
While tile roofs already have high insulation, “Super Galtect” offers even better insulation, making it the recommended choice for tile roof replacements!
Enhanced Wind Resistance
Tile roofs are often fixed by hooking each tile onto a wooden batten called “kawara-san,” which means they can be easily blown off by strong winds during a typhoon.
Slate roofs also have unsecured ends, making them susceptible to cracking from uplift winds.
Currently, many metal roofs like “Super Galtect,” which are horizontally laid, have each panel hooked and secured, providing significantly higher wind resistance.
Reduction in Maintenance Costs
Tile roofs require maintenance of the plaster every 10 to 15 years, while slate roofs need painting and other maintenance.
Modern roofing materials like SGL steel and Galvalume steel, such as “Super Galtect,” do not require costly long-term maintenance like painting.
However, minor maintenance such as sealing repairs will still be necessary!
Roof Replacement Construction Procedure
1. Existing Roof Demolition
2. Installing the Sheathing
3. Installing the Roofing Sheet
4. Fabrication of Flashing (Karakusa, Keraba, Valley, etc.)
5. Main Roof Construction
6. Ridge Flashing Fabrication
6. Rain Stopper Metalwork and Sealing
For detailed roofing work achievements, click here!
Voices of Customers Who Have Had Roofing Work Done
■ A-san, Aoba-ku, Yokohama
Due to a leak in my tile roof, I requested a roof replacement. Kakeru Koumuten’s estimate was relatively lower compared to other companies, so I decided to go with them.
Additionally, the estimate was thorough and easy to understand, and I had no doubts compared to other companies, which made me feel secure in my decision.
Thank you very much for considering the costs.
■ K-san, Miyamae-ku, Kawasaki
I was considering a roof replacement and was introduced to Kakeru Koumuten by someone in the neighborhood who had work done by them.
I also obtained estimates from other companies for comparison, but Kakeru Koumuten provided clear explanations and was more affordable, so I chose them.
This time it was a roof replacement, but after the work was completed, I received photos and was very impressed with their attentive service, so I would like to request other work as well.
■ T-san, Aoba-ku, Yokohama
I requested a roof replacement. Kakeru Koumuten was very responsive, addressing any concerns I had promptly, and I was surprised by their quick response time.
During the work, the craftsmen showed me photos daily and explained the progress in detail, which made me feel very reassured.
Details of Roofing Replacement Costs
We will introduce suitable roofing materials and the cost per square meter for roofing replacement work below.
Asahi Fiberglass/Ridgeway
This is the Ridgeway from Asahi Fiberglass.
The Ridgeway comes with a 10-year manufacturer warranty.
Since it uses natural stone with baked-on paint on the surface, it is a roofing material that does not require painting, which helps reduce maintenance costs!
Additionally, because it uses fine natural stones on the surface, you won’t be troubled by rain noise.
Moreover, it is a lightweight roofing material, making it strong against earthquakes and providing seismic resistance.
* After installation, the surface decorative stones may fall off for about a week, but there is no issue with quality.
Roofing achievements using Ridgeway!
Ridgeway Cost
| Price per square meter | ¥10,500/sqm~ *Varies depending on the shape of the roof and the height of the building. *Varies depending on the type of existing roofing material. |
|---|---|
| Durability | Approximately 25 to 30 years |
| Manufacturer Warranty | 10 years *Natural disasters are not covered. |
| Weight per square meter | 12 kg/sqm *Thin slate and colonial tiles are 20 kg/sqm *Tiles are 50 kg/sqm |
| Notes & Disadvantages | – After installation, decorative stones may fall onto balconies and other areas. It will settle down in about a week. There are no quality issues. – Not suitable for buildings in strong wind areas near the sea. I have seen buildings where the Ridgeway itself was blown away… – Switching from tiles to Ridgeway will decrease insulation properties. |
Color Variations
■Dual Black
■Harvard Slate
■Dual Brown
■Vintage Green
■Earthstone Cedar
Check out the Ridgeway web catalog here!
Galvalume Steel Roof Material Inagawa Shouji / Hiranbee 220
The Hiranbee 220 comes with a 15-year paint warranty and a 25-year hole warranty from the manufacturer.
For re-roofing and overlaying, we also provide a 10-year construction warranty!
Made of Galvalume steel, it is resistant to rust.
Durability and wind resistance are excellent, and compared to other roofing materials, it is lightweight, which reduces the sway during earthquakes, making it a good earthquake countermeasure.
Hiranbee is a lightweight roofing material, making it suitable for overlay (cover) construction.
Roofing construction results using Hiranbee 220!
Hiranbee 220 Costs
| Price per square meter | per square meter/10,300 yen～ *Varies depending on the shape of the roof and the height of the building. |
|---|---|
| Durability | Approximately 35 years to 40 years |
| Manufacturer Warranty | Coating 15 years/Hole 25 years *Natural disasters are not covered. |
| Weight per square meter | per square meter/5.4 kg *Thin slate and colonial are per square meter/20 kg *Tiles are per square meter/50 kg |
| Points to Note/Disadvantages | ・Without insulation material or soundproofing material, rain sounds may echo. ・Without insulation material, thermal insulation is low. ・Thermal insulation is extremely low compared to tiles and slate. |
Color VariationsKiwami-MAX Type
・Gray Silver
・Silver
・Sepia KNC
・Moss Green
・Bamboo Green
・Midnight Blue
・Jet Black
・Dark Brown
・Bright Red
Here is the web catalog for Hiranbee 220!
Galvalume Steel Roof Material with Insulation (Sekino Kousan / Dan Netsu Top)
Dan Netsu Top is a type that comes with thin insulation, as introduced above with Hiranbee. The material is the same as Hiranbee, and it also comes with the same warranty of 15 years for the coating and 25 years for perforation.
For re-roofing and overlaying, our company also provides a 10-year construction warranty!
Being made of Galvalume steel, it is resistant to rust.
Like Hiranbee, it excels in durability, wind resistance, and compared to other roofing materials, it is lightweight, which reduces the sway during earthquakes and serves as an earthquake countermeasure.
It also has less noise from rain compared to Hiranbee, and its insulation properties have improved.
Dan Netsu Top is a lightweight roofing material, making it suitable for overlay (cover) construction.
Check out the construction results of Dannetsu Top here!
Cost of Dannetsu Top
| Unit price per square meter | ¥10,600/sqm～ *Varies depending on the shape of the roof and the height of the building. |
|---|---|
| Durability | Approximately 35 to 40 years |
| Manufacturer’s warranty | 15 years for coating/25 years for perforation *Natural disasters are not covered. |
| Weight per square meter | 5.6 kg/sqm *Thin slate and colonial tiles are 20 kg/sqm *Tiles are 50 kg/sqm |
| Points to note / Disadvantages | Rain noise may echo slightly. ・Switching from tiles may reduce insulation. |
Color Variations
SGL Steel Plate Insulated Roofing Material (Aijii Industry / Super Galtect)
Aijii Industry’s Super Galtect comes with a 15-year coating warranty and a 25-year perforation warranty.
Made of SGL steel plate, it is resistant to rust. It allows for a cool summer and a warm winter.
Additionally, it has soundproofing properties, reducing rain noise.
Being lighter than other roofing materials, it also minimizes shaking during earthquakes, providing earthquake resistance.
It excels in finish, durability, insulation, soundproofing, and wind resistance, and Super Galtect from Aijii Industry is the most frequently used in our construction results and is gaining significant attention!
Roofing Achievements Using Super Galtect!
Super Galtect Costs
| Price per Square Meter | ¥11,500/sqm～ *Varies depending on the shape of the roof and the height of the building. |
|---|---|
| Durability | Approximately 40 years |
| Manufacturer Warranty | Coating 15 years / Red rust 20 years / Puncture 25 years *Natural disasters are not covered. |
| Weight per Square Meter | 5 kg/sqm *Thin slate and colonial tiles are 20 kg/sqm *Tiles are 50 kg/sqm |
| Notes & Disadvantages | None in particular! |
Color Variations
■Shade Black
■Shade Brown
■Shade Moss Green
■Shade Blue
■Shade Charcoal
Check out the web catalog for Super Galtect!
・Zincalume Steel Plate (D Trading / Eco Granie, etc.)
Eco Granie from D Trading Co., Ltd.
comes with a 30-year manufacturer warranty.
Eco Granie is a lightweight metal roof made from Zincalume steel plate, which has the same quality as Galvalume steel, ensuring high durability.
The surface is coated with natural stone granules, which prevents significant fading and maintains aesthetic appeal over the long term.
Thanks to the stone granules on the surface, it can reduce summer heat and rain noise.
Additionally, it is lightweight, rust-resistant, and excels in durability and seismic resistance.
Roofing projects using Eco Granie!
Eco Granie Cost
| Unit Price per Square Meter | per square meter/11,400 yen～ ※Varies depending on the shape of the roof and the height of the building. |
|---|---|
| Durability | Approximately 45 years |
| Manufacturer’s Warranty | 30 years ※Natural disasters are not covered. |
| Weight per Square Meter | per square meter/6 kg ※Thin slate and colonial tiles are per square meter/20 kg ※Tiles are per square meter/50 kg |
| Cautions & Disadvantages | ・The decorative stones may fall off until they stabilize. ・Switching from tiles may reduce insulation. |
Eco Grani Color
■TWEED GRAY
■CAFE
■EVER GREEN
■ONYX
Check out the Eco Grani web catalog here!
Service Areas
Tokyo
Akishima City / Akiruno City / Adachi Ward / Arakawa Ward / Itabashi Ward / Inagi City / Edogawa Ward / Ome City / Edogawa Ward / Ome City / Ota Ward / Katsushika Ward / Kita Ward / Kiyose City / Kunitachi City / Koto Ward / Koganei City / Kokubunji City / Kodaira City / Komae City / Shinagawa Ward / Shibuya Ward / Shinjuku Ward / Suginami Ward / Sumida Ward / Setagaya Ward / Taito Ward / Tachikawa City / Tama City / Chuo Ward / Chofu City / Chiyoda Ward / Toshima Ward / Nakano Ward / Okutama / Nishi-Tokyo City / Nerima Ward / Hachioji City / Hamura City / Higashikurume City / Higashimurayama City / Higashiyamato City / Hino City / Fuchu City / Fussa City / Bunkyo Ward / Machida City / Mitaka City / Minato Ward / Musashimurayama City / Musashino City / Meguro Ward
Kanagawa
Aikou-gun, Aikawa Town / Ashigarakami-gun, Oi Town / Ashigarakami-gun, Kaisei Town / Ashigarakami-gun, Nakai Town / Ashigarakami-gun, Matsuda Town / Ashigarakami-gun, Yamukita Town / Ashigarashimo-gun, Hakone Town / Ashigarashimo-gun, Manazuru Town / Ashigarashimo-gun, Yugawara Town / Isehara City / Odawara City / Kamakura City / Kawasaki City / Kawasaki City, Kawasaki Ward / Kawasaki City, Asao Ward / Kawasaki City, Saiwai Ward / Kawasaki City, Takatsu Ward / Kawasaki City, Tama Ward / Kawasaki City, Nakahara Ward / Kawasaki City, Miyamae Ward / Kozu-gun, Samukawa Town / Zushi City / Chigasaki City / Nakagun, Oiso Town / Nakagun, Ninomiya Town / Hadano City / Hiratsuka City / Fujisawa City / Miura-gun, Hayama Town / Miura City / Minamiashigara City / Yokosuka City / Yokohama City / Yokohama City, Aoba Ward / Yokohama City, Asahi Ward / Yokohama City, Izumi Ward / Yokohama City, Isogo Ward / Yokohama City, Kanagawa Ward / Yokohama City, Kanazawa Ward / Yokohama City, Konan Ward / Yokohama City, Kohoku Ward / Yokohama City, Sakae Ward / Yokohama City, Seya Ward / Yokohama City, Tsuzuki Ward / Yokohama City, Naka Ward / Yokohama City, Nishi Ward / Yokohama City, Hodogaya Ward / Yokohama City, Midori Ward / Yokohama City, Minami Ward / Sagamihara City / Sagamihara City, Midori Ward / Sagamihara City, Minami Ward / Sagamihara City, Chuo Ward / Ebina City / Atsugi City
・Saitama Prefecture, Chiba Prefecture, and parts of Yamanashi Prefecture (Please consult us)
Leave your roofing work to Kakeru Koumuten Co., Ltd., the exterior renovation specialists!
Our company is based in Aoba-ku, Yokohama, but we also have extensive experience in roof renovations in Tokyo and Kanagawa Prefectures.
We are happy to assist with everything from roof overlay work, roof replacement, to partial roof repairs such as leak fixes.
If you have any questions or concerns like “I just want to know the estimate for roof renovation” or “I want to know about roofing materials,” please feel free to contact us!
Summary
We have explained the costs and processes involved in roof replacement work!
Since roof replacement work tends to be costly, we highly recommend obtaining estimates from multiple companies for comparison.
If you have any issues with your roof, rain gutters, exterior walls, or exterior structures, please consult Kakeru Koumuten Co., Ltd. in Aoba-ku, Yokohama!
Estimates and inspections are, of course, free!
Kakeru Koumuten is a remodeling company strong in exterior renovations, and we carry out complete in-house construction from temporary scaffolding to roofing and exterior painting.
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!
We offer comprehensive construction guarantees and aftercare services, and 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 also have information on roofing costs and pricing plans for the roof overlay method, so please take a look if you’re interested!
We look forward to your inquiries. Thank you very much.
Useful information about exterior renovations can be found here!
・Setagaya Ward, Tokyo | Roofing | We performed a tile to Galtuct roof replacement!
・Aoba-ku, Yokohama | Roof Overlay Method | We performed a cover method using Super Galtucts!
・Aoba-ku, Yokohama | Roofing | We performed a roof replacement using Super Galtucts!
・Miyamae-ku, Kawasaki | We performed a roof cover method using Hilanbee 220!
・For those who want to try DIY painting of roofs and exterior walls! Scaffold installation only! Roof and exterior wall painting DIY plan!
・What are the average costs for roof remodeling? Types of construction and how to choose a contractor!
・Latest! Subsidies and grants available for remodeling, and reduction systems!
・How much does it cost to repair a roof? We introduce the average costs!
・Renovation Store in Kanagawa Prefecture, Yokohama | What is Roof Overlay (Roof Cover Method)?
・Exterior Wall Cleaning Construction Plan Without Temporary Scaffolding!
LINE consultations are also very welcome◎
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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!
