Scaffolding is indispensable for new construction and large-scale repair work, and it is said that scaffolding costs account for about 20% of total construction costs. In this article, we explain in detail the importance of scaffolding, the main types, typical costs, ways to control expenses, and key points for choosing the right contractor.
Why is scaffolding work necessary?
Scaffolding is temporary equipment used to carry out work at height safely and efficiently.Under occupational safety and health regulations, scaffolding must be installed when there is danger in work performed at heights of 2 meters or more.
Two important roles of scaffolding
Ensuring worker safety：Compared with stepladders and ladders, scaffolding provides greater stability and makes horizontal movement easier, allowing work to proceed safely and efficiently.
Stable construction quality：With scaffolding in place, painting can be done with appropriate pressure, which improves the quality of the finished result.
The difference between scaffolding for new construction and renovation
In new construction, scaffolding must be assembled with the finished form of the building in mind, while in renovation work, delivery and handling become more difficult because of the constraints of the existing structure.In general, renovation work tends to take longer.
What types of scaffolding are there?
There are many types of scaffolding, and each is selected according to the size, shape, and purpose of the building.
Single-pipe scaffolding
This is the simplest type of scaffolding, built by combining pipes and clamps. Because it can be assembled even in limited space, it is often used in densely built residential areas and for low-rise work.Costs are relatively low, but its strength is lower than that of other scaffolding types.
Wedge scaffolding
This type of scaffolding is assembled by hammering components into wedge pockets on the posts. Because it can be assembled by hand, it can also accommodate buildings with complex shapes and has become the standard in recent years.The hammering noise is a drawback, but for a typical detached house it can usually be completed in about 6 to 8 hours.
Frame scaffolding
This type of scaffolding is assembled from components such as jacks and braces. Its main features are a wide working platform, light weight, and high strength.Because it is assembled with bolts and wire, no hammer is required and noise is reduced, but the work takes longer.
Mobile scaffolding
This is a tower-type scaffold with wheels, and it can be moved precisely to the location where work is needed.After moving it, it is important to apply the brakes without fail.
Suspended scaffolding
This is a type of scaffold suspended from a structure and is used in places where scaffolding cannot be erected from the ground, such as highway maintenance work.
Cantilever scaffolding
This type of scaffolding is useful at sites with limited workspace or unstable ground. Members are attached so they project outward from the building, and scaffolding is then installed on top of them.
Guardrail-first scaffolding
This is scaffolding in which guardrails are installed first, and it is the most effective method for preventing falls.Assembly and dismantling can also be carried out while guardrails are already in place.
Next-generation scaffolding
This is scaffolding built to the latest standards and designed to solve the problems of conventional scaffolding, such as narrowness, weight, shaking, and noise. It helps reduce costs and simplifies assembly and dismantling, making substantial schedule reductions possible.
What is the typical cost of scaffolding work?
The typical cost for assembling, dismantling, and transporting scaffolding is about 700 to 1,000 yen per square meter.
Calculation formula：Scaffolding cost = scaffold area x unit price per square meter
Scaffold area = (building perimeter + 8 m) x house height
For example, for a two-story house with a 30 m perimeter and a height of 6 m: (30+8) x 6 = 228 square meters x 1,000 yen = about 228,000 yen.
This is expensive because it accounts for about 20% of total repair costs, but careless cost cutting should be avoided because it can affect construction quality and safety.
How can scaffolding costs be reduced?
The following four points can help keep costs within an appropriate range.
Obtain multiple quotations
By obtaining quotations from multiple contractors, you can understand fair pricing and use competitive pressure to your advantage. Be cautious with quotations lumped together as "all-inclusive" and ask to confirm the detailed breakdown.
Be careful with "free scaffolding" claims
It is not realistic for scaffolding costs to be truly free. In most cases, the amount is simply added onto other construction charges.Compare proposals based on the total amount.
Request repair work together
If exterior painting, roofing, waterproofing, and similar work are carried out together, scaffolding only needs to be erected once.
Do not leave everything to the management company
If contractor selection is left entirely to the management company, intermediary margins may be added and costs can rise. It is important for the owners' association to lead contractor selection and obtain multiple quotations.
How should you choose a scaffolding contractor?
These are five points for identifying a trustworthy scaffolding contractor.
- Confirm the type of scaffolding they specialize in：Choose a contractor with experience in methods suited to your property
- Check construction track record：Review past project examples and whether experienced workers are on staff
- Communication ability：Confirm whether they provide regular site reports and schedule checks
- Safety measures：Check compliance with safety standards and any past accident history
- Liability insurance coverage：Confirm whether they carry insurance in case of an accident
Frequently Asked Questions (FAQ)
Q. What is the typical price range for scaffolding costs?
It is about 700 to 1,000 yen per square meter. For a typical two-story house of around 30 tsubo, it is common for scaffolding alone to cost more than 100,000 to 200,000 yen.
Q. How long does scaffolding work take?
For wedge scaffolding, a typical detached house usually takes about 6 to 8 hours. The actual time varies depending on the size and shape of the building.
Q. Does scaffolding need to be erected every time repairs are carried out?
Yes. Because scaffolding is temporary equipment, it is removed after the work is completed. By requesting repair work together, you can reduce the number of times scaffolding must be erected and keep costs down.
Q. How is next-generation scaffolding different from conventional scaffolding?
It is scaffolding built to the latest standards that addresses the shortcomings of conventional scaffolding, such as narrowness, weight, shaking, and noise. It reduces work steps, enables significant schedule reductions, and also supports the guardrail-first method.
