Hello!
We are Kakeru Koumuten Co., Ltd., a specialist in exterior renovations located in Aoba-ku, Yokohama, Kanagawa Prefecture!
On this page, we will introduce actual projects completed by Kakeru Koumuten.
This time, we are showcasing a case study of exterior renovation in Nishitokyo City, Tokyo.
The content of this construction project is exterior repair work.
Thank you very much for choosing Kakeru Koumuten Co., Ltd. for your project!
目次
Exterior Repair Construction Data in Nishitokyo City, Tokyo
| Construction Location |
| Nishi-Tokyo City, Tokyo |
| Construction Details |
| Exterior Repair Work Brick Repair |
| Background to the Construction |
|
●Inquiry Details ●Proposal Details |
| Existing Materials / Materials Used |
| Materials Used: Mortar |
| Price Range |
| ¥10,000 – ¥50,000 |
| Construction Period |
| 1 day |
| Completion Month |
| May 2025 |
Exterior Repair Work Construction Procedure
1. Existing Mortar Demolition
We will leave the areas that are not cracked.
2. Formwork Installation
This process is very important as it determines the shape of the mortar.
3. Application of Base Adjustment Agent (Adhesion Enhancer)
This serves to enhance the adhesion between the mortar and the substrate, as well as to penetrate the existing mortar to strengthen the substrate.
4. Mortar Filling
We will be careful to fill it in without creating gaps or air bubbles.
If gaps or air bubbles form, it will reduce strength and durability.
5. Leveling and Finishing
During this process, we will ensure it is finished flat.
6. Formwork Dismantling and Completion
Care must be taken during dismantling to avoid breaking it.
Finally, we will clean up.
6. Brick Repair

What is Mortar?
Mortar is one of the materials widely used in current construction and civil engineering, made by mixing cement, sand, and water to create a building material.
Main Materials of Concrete
Cement
Cement is the main component that determines the strength of concrete. Typically, Portland cement is used. Cement reacts with water to undergo hydration, hardening and solidifying the mortar.
Water
Water is essential for triggering the hydration reaction of cement. If there is too much water, the mortar becomes weak, and if there is too little, it does not mix uniformly.
Sand (Fine Aggregate)
Fine aggregate, such as sand, is used as a filler in mortar, enhancing its density and strength.
Properties of Mortar
1. Hardening
Mortar hardens through a chemical reaction (hydration) with water, increasing in strength over time and solidifying like stone. It can harden both in air and underwater, making it usable indoors and outdoors. Care must be taken as it is prone to drying shrinkage during the hardening process.
2. Adhesiveness
It serves as an “adhesive” that firmly binds bricks, blocks, tiles, and more. The rougher the surface material, the easier it adheres, while smooth materials (like glass and metal) are harder to bond. Recently, “polymer cement mortar,” which includes resin, has become popular, exhibiting higher adhesiveness.
3. Strong in Compression, Weak in Tension and Bending
Mortar excels in compressive strength, making it effective in areas that bear weight. However, it is weak against tensile and bending forces, making it prone to cracking.
It is also not very resistant to expansion and contraction due to earthquakes or temperature changes, requiring appropriate measures.
4. Permeability and Shrinkage
Mortar is permeable to water, so it has poor waterproofing performance as is. When used on exterior walls or roofs, it must be finished with paint or waterproofing materials. Additionally, it has a property of shrinking during hardening and drying, which is a major cause of “cracking.” Special care is needed in areas prone to freeze-thaw cycles (frost damage).
Leave Your Exterior Renovation in Nishi-Tokyo City, Tokyo to Kakeru Koumuten!
Our company handles many exterior renovations in Nishitokyo City, Tokyo. We are happy to assist with partial roof repairs such as exterior repairs, exterior renovations, roof overlays, roof replacements, exterior wall painting, exterior wall replacements, and leak repairs, just like the ones mentioned this time!
For specific requests like “I want it to last long with one renovation,” “I want to keep costs down as much as possible,” or “I want to improve insulation because the indoors are hot,” we provide optimal solutions.
If you have any concerns or questions such as “I just want to know the estimate for exterior wall painting” or “I want to know about roofing materials,” please feel free to contact us!
List of Areas in Nishitokyo City, Tokyo
Izumicho, Nishitokyo City / Kitaharacho, Nishitokyo City / Kitamachi, Nishitokyo City / Sakaemachi, Nishitokyo City / Shibakubocho, Nishitokyo City / Shimohoya, Nishitokyo City / Shinmachi, Nishitokyo City / Sumiyoshicho, Nishitokyo City / Tanashimachi, Nishitokyo City / Nakamachi, Nishitokyo City / Nishiharamachi, Nishitokyo City / Higashimachi, Nishitokyo City / Higashifushimi, Nishitokyo City / Hibarioka, Nishitokyo City / Hibarioka Kita, Nishitokyo City / Fujimachi, Nishitokyo City / Hoyamachi, Nishitokyo City / Midorimachi, Nishitokyo City / Minamimachi, Nishitokyo City / Mukodai, Nishitokyo City / Yanagisawa, Nishitokyo City / Yatodacho, Nishitokyo City
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 renovation company strong in exterior renovations, and we carry out complete in-house construction from temporary scaffolding to roofing and exterior wall painting. We are confident that we do not fall short compared to other companies in terms of “cost, quality, and efficiency”! We welcome competitive estimates!
We also offer comprehensive 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!
Helpful information about exterior renovations can be found here!
・Trust Kakeru Koumuten for roof renovations in Nishitokyo, Tokyo!
・Trust Kakeru Koumuten for exterior painting in Nishitokyo, Tokyo!
・Trust Kakeru Koumuten for waterproofing work in Nishitokyo, Tokyo!
・Trust Kakeru Koumuten for leak repairs in Nishitokyo, Tokyo!
・About the costs of exterior construction|Kakeru Koumuten’s exterior construction plans!
・Painting DIY Plan! For those who want to try DIY roof and exterior wall painting! We will only set up the scaffolding!
・About the costs of roof overlay|Kakeru Koumuten’s roofing plans!
・About the costs of exterior painting|Kakeru Koumuten’s exterior painting plans!
・About the costs of leak repairs|Kakeru Koumuten’s leak repair plans!
・About the costs of ridge cap replacement and surface plaster|Kakeru Koumuten’s construction plans!
・Latest information|Subsidies and grants available for renovations!
・About the costs of exterior wall cleaning|Exterior washing plan without scaffolding!
・Kanagawa Prefecture, Yokohama City Renovation Store | What is Roof Overlay (Roof Cover Method)?
LINE consultations 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!



