Estimate Simulation
Easy! Exterior Renovation Self-Estimation!
On this page, you can simulate an estimate for exterior renovations!
If you know the building’s “floor area” and “total floor area”, you can perform the simulation.
The floor area and total floor area are indicated on the blueprints!
1 tsubo = 3.3㎡!
Therefore,
20 tsubo = 66㎡
30 tsubo = 99㎡
That’s right!
Please enter the values only for the desired exterior renovation!
Temporary Scaffolding Installation (including assembly, disassembly, and mesh sheets)
This is the temporary scaffolding required for exterior wall painting and roof work.
Please enter the total floor area!
| Item | Value | Total Amount |
|---|---|---|
| Total Floor Area【㎡】 | ¥0 |
Exterior Painting (Including 3 Coats with Primer)
Please select your desired durability period and enter the total floor area.
Check out our exterior painting project results here!
| Item | Value | Total Amount |
|---|---|---|
| Total Floor Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Total Floor Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Total Floor Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Total Floor Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Total Floor Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Total Floor Area【㎡】 | ¥0 |
● Acrylic Paint: SK Kaken/Please Coat
● Urethane Paint: SK Kaken/Mild Urethane
● Silicone Paint: SK Kaken/Ceramic Silicone
● Radical Paint: SK Kaken/Premium Silicone
● Fluorine Paint: SK Kaken/Ceratight F
● Inorganic Paint: SK Kaken/Premium Inorganic
Vertical Joints and Sash Surround Caulking (Vertical Joint Replacement & Sash Surround Reinforcement)
Please select the desired durability period and enter the total floor area.

| Item | Value | Total Amount |
|---|---|---|
| Total floor area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Total Floor Area【㎡】 | ¥0 |
This includes three coats of waterproof paint (top coat) for the balcony.
Please enter the number of balconies to be coated with the top coat.
| Item | Value | Total Amount |
|---|---|---|
| Number of Areas to be Painted | ¥0 |
Balcony Cap Metal Replacement (Galvalume Steel Sheet Metal Processing)
Please enter the length to be replaced.
| Item | Value | Total Amount |
|---|---|---|
| Length【m】 | ¥0 |
Canopy Metal Exchange (Kiriyoke) Galvalume Steel Sheet Metal Processing
Please enter the number of areas to be processed.
| Item | Value | Total Amount |
|---|---|---|
| Number of Areas to Process | ¥0 |
Eaves Ceiling Replacement
Please select your desired materials. Enter the total floor area (㎡)! Partial replacements will cost between 20,000 and 40,000 yen per area.
| Item | Quantity | Amount |
|---|---|---|
| Decorative Plywood | ¥0 | |
| Calcium Silicate Board | ¥0 |
| Total Amount | ¥0 |
|---|
Fascia Board Replacement (Galvalume Steel Sheet Processing)
This is the metal processing for the eaves and fascia boards.


| Item | Value | Total Amount |
|---|---|---|
| Total Floor Area (㎡) | ¥0 |
Roof Renovation
In the roof renovation simulation, please enter the“Roof Area”!
First, let me explain how to calculate the roof area!
【For 1 to 3 sides】 Roof Area = 1st Floor Area × 1.4

【For roofs with 4 sides or more】Roof area = 1st floor area × 1.6
Therefore
● For a roof with 2 sides and a 1st floor area of 50㎡, 50㎡×1.4=70㎡ (roof area)
● For a roof with 4 sides and a 1st floor area of 50㎡, 50㎡×1.6=80㎡ (roof area)
It will be as follows.
Please note that the 1st floor area refers only to the area of the first floor, not the total floor area!
Roof Painting (including 3 coats of primer)
Please select the desired durability of the paint from the tabs.
| Item | Value | Total Amount |
|---|---|---|
| Roof area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Roof Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Roof Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Roof Area【㎡】 | ¥0 |
Roof Overlay (Cover Method) (Limited to Underlayment Slate or Shingle Materials)
Process
- Removal of Existing Ridge and Snow Stops (Including Waste Material Costs)
- New Underlayment (Roofing)
- Metal Flashing (Eaves and Decorative Trim)
- Main Roofing (Roof Material)
- Ridge Flashing Processing (Including Purlins and Rafters)
Please select your desired roofing material and enter the roof area.
Click here for Roof Overlay Construction Achievements!
Please choose from the following 4 types of roofing materials!
| Item | Value | Total Amount |
|---|---|---|
| Roof Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Roof Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Roof Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Roof Area【㎡】 | ¥0 |
Roof Replacement Work
Process
- Dismantling existing roof (including waste disposal costs)
- New sheathing installation
- New underlayment (roofing)
- Metal flashing (eaves and decorative trim)
- Main roofing (roof materials)
- Ridge cap processing
Please select your desired roofing material and enter the roof area.
Check out our roofing replacement project results here!
Please choose from the following 4 types of roofing materials!
| Item | Value | Total Amount |
|---|---|---|
| Roof Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Roof Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Roof Area【㎡】 | ¥0 |
| Item | Value | Total Amount |
|---|---|---|
| Roof Area【㎡】 | ¥0 |


