The cost of installing 3D wall panels – how much will you save by choosing Thalia Flex? (Calculation and summary)

Planning to redesign your interior and dreaming of a modern wall with a striking, three-dimensional texture? When calculating your renovation budget, it’s not just the cost of the product itself that matters, but above all—how much it costs to install wall panels. Professional installation services and the need to refresh the walls periodically can dramatically increase the final renovation bill.

In this article, we present a reliable, mathematical comparison of three different wall-finishing systems for a surface measuring 5 m wide and 2.8 m high (an area of 14 m²). We’ll look at the initial costs and long-term expenses over a 15-year period, accounting for renovations and refreshing the interior every 5 years.

Three scenarios for finishing a 5 m wall – Initial costs (Year 0)

Scenario A: Veneered slats on acoustic felt (with installation)

Classic vertical oak slats on a black felt backing (panel dimensions: 60 x 280 cm), built around an MDF core.

• Material (Panels): Each panel is 60 cm wide. To cover a wall 500 cm wide, we need 9 panels (the last one cut lengthwise). At a gross price of PLN 319.00 per panel, the cost is PLN 2,871.00.

• Material (Adhesive): The heavy MDF core on felt requires a strong bond. With 4 adhesive lines per panel, we’ll use 100.8 linear meters of adhesive. At a coverage rate of 17 linear meters per tube, this means 6 tubes of Expert Creativa by Cezar mounting adhesive (PLN 56.27 each), costing PLN 337.62.

• Labor: Due to their weight and the need for precise cuts, installation is usually entrusted to professionals. At an average market rate of PLN 100/m², labor costs PLN 1,400.00.

Total initial cost for Scenario A: PLN 4,608.62

Scenario B: Routed MDF panel with LED lighting (with installation)

A heavy wall panel finished with natural oak veneer and integrated decorative LED lighting.

• Material (LED Panel): At a unit price of PLN 1,299.99 for a panel 60 cm wide, we need 9 panels to cover the wall. The panels alone cost PLN 11,699.91.

• Adhesive and accessories: Installing thick MDF boards with adhesive and safely wiring the LED system requires 6 tubes of adhesive Expert Creativa by Cezar (PLN 337.62), plus connection accessories estimated at PLN 350.00. The total is PLN 687.62.

• Labor: Installing heavy veneered panels and making precise electrical connections requires a carpenter and an electrician (approx. PLN 150/m²). This brings the cost to PLN 2,100.00.

Total initial cost for Scenario B: PLN 14,487.53

Scenario C: Quick, low-cost installation of Thalia Flex panels (DIY method)

Ultralight, flexible 3D panels made from eco-friendly, durable high-density polystyrene (HDPS)—designed for DIY installation.

• Material (Panels): Each panel measures 1.4 x 4.1 cm and is 280 cm long. For a wall 500 cm wide, we need 122 panels. They come in packs of 6, so we buy 21 packs of Thalia Flex matte white at PLN 297.05 per pack, for a total of PLN 6,238.05. For convenient cutting to size, it’s worth using supporting accessories such as a sturdy Cezar wooden sawhorse.

• Material (Adhesive): Lightweight polystyrene requires just one precise line of adhesive per panel. Total consumption for 122 panels is 341.6 linear meters. We need 21 tubes of Expert Creativa by Cezar adhesive, costing PLN 1,181.67.

• Labor: PLN 0.00! Their low weight and intuitive click-fit connection mean you can easily install them yourself in just a few hours.

Total initial cost for Scenario C: PLN 7,419.72

Long-term analysis: How often should you renovate, and how much does it cost?

Interior design trends and natural wear mean that most people decide to refresh their interiors or change the colour scheme every 5 years. Let's see how each material holds up over this period and how much you'll pay for subsequent renovations over 15 years:

1. Scenario A (MDF slats on felt) – Three complete replacement cycles

MDF board and felt are not moisture-resistant, collect dust easily and fade over time. Most importantly, felt-backed slats cannot easily be repainted with conventional wall paint. Changing the style means removing the entire structure, damaging the plaster and purchasing a new decorative system, as well as paying professionals to install it again. We therefore assume three complete purchase-and-renovation cycles (in years 0, 5 and 10).

• Cost after 15 years for Scenario A (3 cycles): 3 × 4 608,62 zł = 13 825,86 zł

2. Scenario B (MDF panels with LED lighting) – Two replacement cycles over 15 years

As in Scenario A, MDF board is not moisture-resistant, and the integrated LED strip naturally burns out after several years of intensive use. Replacing the diodes inside the routed panels involves dismantling them and hiring a carpenter and electrician again. We assume that these premium panels will undergo one complete replacement within 15 years (2 installation cycles in total).

• Cost after 15 years for Scenario B (2 cycles): 2 × 14 487,53 zł = 28 975,06 zł

3. Scenario C (Thalia Flex) – Versatility, durability and effortless style changes

A major advantage of Thalia Flex panels is that they are 100% waterproof, making them safe to use in damp rooms such as kitchens, bathrooms and hallways. In addition, HDPS is exceptionally durable and resistant to dents, making these panels a long-term investment.

When, after 5 years and then again after 10, you want to transform the character of your interior and give it a fresh new look, you won't need to remove the panels! These panels are built to last for years – simply repaint them from time to time and your entire interior will take on a completely new look. Assuming the cost of a professional painting kit (high-quality scrub-resistant paint, rollers and masking tape) is 250,00 zł for each DIY refresh:

• Cost after 15 years: 7 419,72 zł (year 0) + 250,00 zł (year 5) + 250,00 zł (year 10) = 7 919,72 zł

The numbers speak for themselves: Over 15 years, thanks to their durability, waterproofing and ease of repainting, choosing Thalia Flex saves you 5 906,14 zł compared with classic felt-backed slats and as much as 21 055,34 zł compared with MDF panels with LED lighting!

Budget comparison table (upfront and long-term costs)

The comparison table below shows in detail how the costs of investing in a 14 m² decorative wall break down, both upfront and over the long term:

Common mistakes when finishing 3D walls

• Ignoring moisture resistance: Installing MDF or plaster panels near water sources quickly leads to swelling, rot, and the need for costly removal.

• Buying materials that cannot be refurbished: Choosing coverings that cannot be easily repainted means incurring huge costs whenever you change your interior design.

• Failing to account for professional labor costs: The low purchase price of a raw material (e.g. raw plaster) can be misleading once you add the cost of grouting, sanding, and priming by a contractor.

Summary – Your Thalia Flex benefits checklist

• [ ] An investment built to last – HDPS material is resistant to impacts and the passage of time.

• [ ] 100% waterproof – safe to install in bathrooms, bedrooms, or kitchens.

• [ ] A quick style update (a fresh new look) – refresh your interior simply by repainting the panels with wall paint.

• [ ] No extra costs – DIY installation eliminates the need to hire professionals.

FAQ – Frequently asked questions

Are Thalia Flex flexible panels suitable for finishing arches and columns?

Yes. Thanks to their innovative flexible construction, these panels allow you to neatly and easily cover irregularly shaped surfaces such as pillars, arches, or curved walls.

Can 3D panels made of HDPS polystyrene be installed in a damp bathroom?

Yes. Their key advantage is that they are fully waterproof, making them safe to use in rooms with high humidity, such as bathrooms, kitchens, and home spa areas.

How can I change the color of Thalia Flex panels during my next renovation?

These panels are built to last – simply repaint them from time to time with any water-based wall paint (e.g. latex or acrylic paint) to give your entire interior a completely new look and a fresh feel.

Where can I buy genuine Thalia Flex panels and the necessary installation accessories?

To make sure you choose an original product with verified technical specifications, visit the 3D wall panels category in Cezar’s official store. You can also browse other stylish designs from the unique Thalia range to find the perfect match for your vision.

*The market comparison above uses the specifications and market prices of the following third-party products: Scenario A includes Veneered slats on acoustic felt – Oiled Oak, 60 x 280 cm (manufacturer/distributor: Parkiet.pl), while Scenario B is based on the specifications of the MB (LED slat) milled MDF panel in oak veneer with LED lighting (manufacturer/distributor: Weneve).