The Oñati thermoceramic block by Vetonek is a low-density ceramic unit for building single-leaf walls with high thermal efficiency, as an alternative to multi-layer walls. It simplifies the building envelope into a single layer of masonry and is designed for builders and self-builders.
✅ Advantages
Single leaf: one single wall replaces the multi-layer solution and simplifies construction.
Low density: units weighing from 6.4 to 13.9 kg, easy to handle for their size.
17.5 pcs/m²: few units per m² thanks to the 30 x 19 cm format.
ECO range with higher insulation: 30 x 29.5 x 19 and 24 x 24 x 19 cm formats.
CE marking: technical data sheet with thermal values available on request.
🏗️ Applications
Exterior enclosure walls.
Load-bearing walls.
Separating walls.
📋 Technical data
Standard range, 30 cm long x 19 cm high: widths of 14.2 cm (6.4 kg), 19.2 cm (8.5 kg), 23.2 cm (10.4 kg) and 28.5 cm (12.3 kg).
ECO range: 30 x 29.5 x 19 cm (13.9 kg) and 24 x 24 x 19 cm (9.1 kg).
Coverage: 17.5 pcs/m² for the 30 cm long formats.
Material: low-density ceramic, red colour.
🧮 How much do I need?
For 40 m² of wall with the 19.2 cm width: 40 × 17.5 = 700 pcs. This equals 9 pallets of 75 pcs (675 pcs) plus 1 pack of 37 pcs, 712 pcs in total with a small margin.
📦 Sales formats
14.2 cm: pack of 45 pcs (2.57 m²) or pallet of 90 pcs (5.14 m²).
19.2 cm: pack of 37 pcs (2.11 m²) or pallet of 75 pcs (4.29 m²).
23.2 cm: pack of 30 pcs (1.71 m²) or pallet of 60 pcs (3.43 m²).
28.5 cm and ECO 29.5 cm: pack of 22 pcs (1.26 m²) or pallet of 45 pcs (2.57 m²).
ECO 24 x 24 x 19 cm: pack of 40 pcs or pallet of 80 pcs.
Pallets weighing up to 1,000 kg, delivered by truck.
🧰 Installation
Set out the wall and check that the foundation or floor slab is clean and level.
Lay the first course on a perfectly level mortar bed.
Place the blocks with mortar, staggering the vertical joints.
Check plumb and level on every course.
Make cuts with a disc cutter and follow the project specifications at lintels and junctions.
💡 Vetonek Tip: choose the width according to the project and request the technical data sheet before buying: with the thermal values at hand, it is easier to justify the building envelope and to decide between the standard and the ECO range.
Frequently asked questions
What is the Oñati thermoceramic block used for?
It is used to build single-leaf walls with high thermal efficiency, instead of multi-layer walls. It is used in exterior enclosure walls, load-bearing walls and separating walls.
What are its dimensions and weights?
The standard range measures 30 cm long x 19 cm high, with widths of 14.2 cm (6.4 kg), 19.2 cm (8.5 kg), 23.2 cm (10.4 kg) and 28.5 cm (12.3 kg). It is a low-density ceramic in red colour.
How many units do I need per square metre?
For the 30 cm long formats you need 17.5 pcs/m². For example, for 40 m² of wall with the 19.2 cm width you need 700 pcs, which with a small margin comes to 712 pcs.
How is it sold and shipped?
It is sold in packs or pallets depending on the width; for example, the 19.2 cm width comes in a pack of 37 pcs or a pallet of 75 pcs. Pallets weigh up to 1,000 kg and are delivered by truck. Shipping cost and delivery time are calculated in the next step of checkout, based on your postcode.
What is the difference between the standard and the ECO range?
The ECO range offers higher insulation and comes in 30 x 29.5 x 19 cm and 24 x 24 x 19 cm formats. It has CE marking and you can request the technical data sheet with the thermal values before buying.
Frequently Asked Questions
How many Oñati blocks fit in one m²?
17.5 pcs/m² in all 30 cm long formats, both in the standard range and in the ECO 30 x 29.5 x 19 cm format.
Which block width should I choose?
Your project determines it: from 14.2 cm for partition walls up to 28.5 cm or the ECO range for single-leaf external walls with more insulation.
What is the difference between the standard and the ECO range?
The ECO range offers higher insulation, in 30 x 29.5 x 19 cm and 24 x 24 x 19 cm formats. The standard range covers widths from 14.2 to 28.5 cm.
What is its thermal transmittance?
The thermal values are given in the technical data sheet, which we send on request.
What is it laid with?
With mortar, bedding the first course perfectly level and staggering the vertical joints.
Is it suitable for load-bearing walls?
Yes, it is used for external walls, load-bearing walls and partition walls, always in line with the project.
How much does a pallet weigh?
Between about 553 and 728 kg depending on the format; for example, the pallet of 75 pcs of the 19.2 cm width weighs about 637 kg.
Can I buy less than a pallet?
Yes, all formats are sold in packs, from 22 to 45 pcs depending on the width.
