BLOGS

How to calculate materials for enclosing a terrace

When you want to close a terrace or pergola with adjustable blinds and metal sliders , one of the most frequently asked questions is:

How many slides and slats are needed?

The calculation is simple if you understand how the system works.

In this guide we explain step by step how to calculate materials for a pergola or terrace , using real examples.

How the sliding system works

The system for adjustable blinds consists of:

• metal slides

• wooden or metal slats

The slides are mounted on the structure and contain the slat holders , where the slats are inserted.

A 1 meter slide kit has:

👉 11 blade holders

This means that one kit includes 11 blades .

Material prices

To calculate the approximate cost, we need to know the price of the components.

Indicative example:

LUMINAL sliders

• minimum price: 170 RON / set (1 m)

• one set contains 11 blade holders

Nordic pine slats

• approximately 18 RON / piece

There are other options:

thermotreated pine slats

• higher price, but better outdoor resistance

metal slats

• very high durability and minimal maintenance

Example of calculation for a terrace

Let's take a real example.

Gap size:

• width: 2 meters

• height: 2.5 meters

Step 1 – calculating the slides

The slides are 1 meter long.

If the height of the pergola is 2.5 m , we need to install sliders in series.

For this height we need:

👉 3 slider kits

Why?

Because:

• 2 kits = 2 meters

• 3 kits = 3 meters

3 kits are installed to cover the entire height.

Step 2 – calculating the blades

Each kit has:

👉 11 blade holders

If we use 3 kits , the result is:

3 × 11 = 33 blades

These will cover the 2.5 meter panel.

Step 3 – cost calculation

Slider cost:

3 × 170 RON
= 510 RON

Cost of natural pine slats:

33 × 18 RON
= 594 RON

Estimated total cost

510 RON + 594 RON

👉 1104 RON for the complete panel

This is an indicative example for a 2 m × 2.5 m opening.

The advantage of sliding systems

Compared to other solutions for enclosing a terrace:

Systems with metal slides and adjustable slats offer a good balance between cost, flexibility and durability.

Important recommendations for installation

For proper system operation:

• the slides must be mounted perfectly aligned

• the level is checked with a spirit level or laser

• each slide has 6 mounting holes

• a complete set has 12 fixing points

Screws are chosen depending on the support:

• wood

• metal

• concrete

• brick

Important tip for series-mounted slides

When using Z-profile slats , series mounting requires a small adjustment.

The first slide is mounted as a whole.

At the next slide, cut approximately 2 cm to ensure correct alignment of the blades and uniform closing.

Conclusion

Calculating materials for enclosing a terrace is simple if you know two things:

✔ how many slides are needed per height
✔ how many blades come in a kit

In most cases:

👉 1 slide kit = 11 slats

With this system you can quickly transform a pergola or terrace into a protected and flexible space.

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If you want to calculate the exact materials for your terrace, you can consult:

• LUMINAL slides available

• pine, thermotreated or metal slats

and choose the right option for your project.