Shuttering, or formwork, is one of the biggest cost items on a concrete job, and there’s no fixed number for what it costs. It depends on the project, labour, equipment, geometry, how many times you reuse the panels, and whether props, ties and access systems are counted in. One technical review puts formwork at somewhere between 35 and 60 percent of total concrete construction cost for some projects.

Reuse makes the biggest difference. Aluminium and steel systems can handle hundreds of pours, while timber and plywood wear out much faster on site, and how long they last depends on the material grade, cleaning, release agent use, handling and how closely each pour matches the panel layout.

So the formwork you pick isn’t just about purchase price. It shapes labour, construction speed, surface finish, waste and how often you’ll need replacements.

Table of Contents

What is Shuttering?
Why is Shuttering in Construction Important?
Different Types of Shuttering Materials Used in Construction
Conclusion
Frequently Asked Questions

What is Shuttering?

Picture wet concrete. On its own, it has no shape at all, just weight and no way to hold itself together. Shuttering solves that problem. It’s the temporary mould, built from timber boards, plywood, steel panels or other formwork systems, that gets set up around a column, beam, slab or wall before the pour even starts.

Here’s the thing people miss: the shuttering isn’t just holding concrete in. It’s actively deciding the final dimensions and surface finish of whatever gets cast, down to the last millimetre.

Once the concrete is cured enough to stand on its own, the shuttering is removed. Depending on the system, it might get cleaned and sent straight into the next pour. It is for this reason why the material you choose ends up affecting both your timeline and your budget.

Read more: Civil Engineer to BIM Engineer Career Guide

Why is Shuttering in Construction Important?

Shuttering does more than just hold concrete in a shape. It controls the surface finish, and a smooth shutter face means less plastering work later. It also affects worker safety, since formwork that is not braced correctly is one of the more common causes of collapse during a pour.

Shuttering speed also drives the construction schedule directly. In a multi-storey building, you can’t start the next floor’s shuttering until the current one comes down and gets reset. Speed here isn’t just convenient. A system that assembles and strips fast can get a builder through one floor in 5 to 7 days. Slower systems stretch that same floor to 10 or 12.

So when a structural engineer signs off on formwork design, cost is rarely the whole story. Load capacity on the props matters. So does how many times the panels can take a reuse.

And local weather changes how the material behaves too. This is also where BIM coordination helps, since civil engineers can check the formwork, props, ties and reinforcement together in one model before the pour starts.

Different Types of Shuttering Materials Used in Construction

There are several types of shuttering material in use across Indian construction sites today, and each one suits a different scale of work.

Timber Shuttering

Timber earns its keep when a form has to be built and reshaped right there on site. It’s cheap, it’s easy to carry around, and cutting it takes no special skill, which means carpenters can knock out shapes that would cost a fortune to fabricate in steel. Curves, irregular angles, none of it needs specialised equipment. Where timber falls short is durability. Get it wet enough times and it swells or warps, so a typical set is usually done after 10 to 15 uses. And before every single pour, someone has to coat it with formwork oil, or the concrete bonds straight to the wood grain.

Plywood Shuttering

Timber has a moisture problem. Plywood was, in a lot of ways, built to fix exactly that. Sheets backed by a timber frame give a flatter, smoother finish than raw planks ever could, and when sealed properly, plywood shrugs off moisture far better than solid timber does. It buys you more life too, typically 8 to 10 reuses before the surface starts to delaminate. That’s enough to make it the default pick for residential jobs and low-rise buildings, where the shapes are mostly straight walls and slabs, and the budget doesn’t stretch to steel.

Steel Shuttering

100 to 150 reuses. Sometimes more. That single number explains why large projects lean on steel formwork despite the higher upfront cost. Panels get bolted into rigid sections and craned into place, and because steel neither absorbs moisture nor warps under load, the per-use cost drops fast once you’re running a big job. The finish is the sharpest and most uniform you’ll get out of any formwork material, which is exactly why exposed concrete work almost always specifies steel. What you give up is convenience: these panels are heavy, they need machinery to move, and buying a set costs more than timber or plywood by a wide margin.

Aluminium Formwork

Walk onto a large housing site in India today and there’s a good chance aluminium formwork is what’s holding the concrete. It assembles quickly. It is also very light enough for a small crew to handle without cranes and a single set can survive 200 or more pours. Walls, slabs and columns often get cast in one continuous pour with this system, which means fewer joints and less rework later.

There’s a catch, though. Aluminium formwork is built around a fixed layout, so it only makes sense when the same floor plan is repeating across dozens or hundreds of units. One-off custom designs are not what this system was made for.

Because the layout is fixed, clash detection in a BIM model is useful here. It shows where panels, ties, rebar or service openings collide before anything reaches the site, when a fix is still cheap.

Plastic Formwork

Boundary walls, drains, and low-cost housing are common uses for plastic formwork. It works well for small, repetitive structures where lightweight, rustproof panels are useful. Made from high-density polypropylene, the panels lock together with simple pins, so workers can assemble them with little training. A typical system can be reused around 50 times. However, plastic formwork cannot handle the same pressure as steel, so it is better suited to smaller and shorter concrete pours.

Fabric Formwork

Not every shuttering system is rigid. Fabric formwork stretches flexible, permeable sheets over a frame instead, and it shows up mostly in architectural and precast work where the goal is a curved or sculptural shape rather than a straight wall. There’s an odd side benefit too: the fabric lets excess water bleed out of the concrete as it cures, which can actually improve both strength and surface quality on the finished piece. It hasn’t gone mainstream for standard structural work, but design-led projects are using it more each year.

Read more: BIM Coordinator Interview Questions and Answers For Civil Engineers

Conclusion

There is no single shuttering material that fits every project. Timber and plywood make sense where forms need to be cut or adjusted on site and reuse is limited. Steel suits work that demands high durability, repeated use, and a consistent finish. Aluminium is built for fast, repetitive construction, while plastic works well for lighter applications with repeated casting. Fabric takes a more specialised route for unusual shapes.

The practical choice usually comes down to three things: expected reuse, construction speed, and the required concrete finish. Looking at those factors before work starts can help avoid unnecessary material costs and rework later.

This is also where BIM skills make a real difference, since civil engineers who have them can plan formwork layouts better and catch problems earlier, something BuildAmbit’s Full-Stack BIM Professional Course for Civil Engineering covers as part of real project workflows rather than isolated theory.

Frequently Asked Questions

1. What is the difference between shuttering and formwork?

Shuttering is the surface in direct contact with wet concrete. It gives the concrete its required shape. Formwork refers to the complete arrangement, including the shuttering, props, braces, ties, and other parts that keep the mould stable until the concrete hardens.

2. What are two types of formwork?

The two broad categories are traditional formwork and engineered formwork. Traditional systems are made on site, usually from timber or plywood, and adapted for individual pours. Engineered systems use prefabricated steel, aluminium, or plastic panels that are joined with bolts or clips and reused across multiple pours.

3. Why are there small holes on the concrete surface after removing the formwork?

Small surface cavities are known as bug holes or blow holes. Air becomes trapped between the fresh concrete and the formwork, leaving these marks after stripping. Inadequate vibration is a common cause, although concrete workability, lift height, and the application of release agent can also affect how many appear.

4. What is formwork oil?

Formwork oil is a release agent spread over the mould surface before concrete is placed. Its job is to prevent the concrete from sticking to the formwork. This makes stripping easier and helps keep both the concrete finish and the formwork surface in good condition.

5. When can shuttering be removed after a concrete pour?

It depends on the structural element and the concrete grade, but as a general guide, vertical shuttering on columns and walls can come off in 1 to 2 days, while slab and beam soffits need to stay in place for 7 to 28 days depending on the span, since these elements carry load and need more time to gain adequate strength.

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Explore What Shapes Real Careers in the AEC Industry

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