large blocks

The economic building solution for large, solid walls

Silka sandstone elements are particularly suitable for large, load-bearing walls because of their dimensions. Working with these elements contributes to fast building and particularly smooth walls. The elements are large and strong – and therefore cost-effective. They are widely used in housing construction, both low and high-rise buildings, utility construction, the budget sector and agricultural construction. Major advantages include their varying (standardised) compressive strengths, flexibility and simple mechanical processability. 


Silka elements are suitable for BIM (Building Information Model). This means that we can integrate them for you into virtual buildings that you set up together with us using BIM.

Mass+ and Eco-elements

For use in solid partition walls between houses and end walls, Xella has developed Silka Massa+ elements for mechanical processing. They meet the acoustic insulation requirements of the (Dutch) Building Decree without sacrificing living space. The density of these elements is in fact higher than that of common elements. The elements are available at thicknesses of 175, 250, and 300 millimetres.

Besides standard elements and Mass+ elements, we also offer Eco-elements on the basis of at least 30% recycled limestone for extra sustainability and chamfered blocks for (double-sided) fair-faced brickwork.

Application of Silka elements

  • Partition walls between houses

    For partition walls between houses, there is the choice of a single massive partition wall (300 millimetres) and a construction involving anchorless cavity walls (120-60-120 millimetres). From an acoustic point of view, the anchor-free cavity wall is preferred, as it performs better in the area of acoustic insulation.

  • Load-bearing and non-load-bearing inner walls

    The flexibility and simple processability of Silka elements make them ideally suited for use in inner walls, whether these are load-bearing or not.

  • Load-bearing and non-load-bearing inner cavity sheets

    Silka elements are suitable for putting up inner cavity sheets. The elements form the basis for traditional residential construction. An insulation package is installed in the cavity; next, the outer cavity sheet is made, for example out of brickwork – the good old 1-2-3 job.

Advantages of Silka elements

  • Simple processing technique

    Elements are mechanically processed with a setting machine and supporting equipment. This method of building is flexible, fast, work-friendly, requires little preparation, and produces less waste than its alternatives. Expensive investments in materials, such as concrete formwork and heavy building cranes, aren’t needed.

  • A fast, rational building method that isn’t too work-intensive

    Building prefab means building ‘just-in-time’ and quickly. Silka elements are industrially prefabricated, can be delivered on demand and offer quick, clean installation with minimal waste right out of the factory. The resulting cost and time savings are considerable.

  • Water vapour regulating capacity

    Silka sand-lime brick is able to absorb moisture and later release it again, facilitating moisture management in buildings. In other words: these materials ensure a pleasant living environment, while ruling out moisture and fungi.

  • Heat-accumulating capacity

    Sand-lime brick is able to absorb some of the heat in a room and release it again when the room cools down. This means that outside temperatures only affect inside temperatures after a certain amount of time. Because of this, rooms are cool in the summer and warm in the winter.

  • Noise insulating

    Thanks to the high volumic mass of sand-lime brick, walls made of Silka elements have a high acoustic insulation capacity. For extra noise insulation, there are Mass+ elements. These contain an additive and have a higher volumic mass than standard elements. They comply with the sound absorption requirements of the (Dutch) Building Decree without sacrificing living space. The thickness of these elements (2,150 or 2,300 kg/m3) is in fact greater than that of regular elements (1,750 kg/m3). The elements are provided in 250 and 300 millimetre thicknesses for residential partition walls and in a thickness of 175 millimetres for end walls. Furthermore, the elements are available in two pressure strengths: CS 20 and CS 28 for creating multi-storey residential buildings. Even higher pressure strengths (CS 36 and CS 44) are available upon request.

  • Incombustible and fire-resistant

    Silka sand-lime brick is incombustible. Depending on the thickness of the wall, sand-lime brick is able to withstand a fire for longer than 360 minutes. It retains its characteristics and does not deform.

  • Environmentally friendly and sustainable

    Silka sand-lime stone is a sustainable choice in every respect. It is made from widely available natural resources: chalk, sand, and water. The production process is energy efficient. Sand-lime stone is completely recyclable.

Simple mounting and finishing

Working with Silka elements is very easy. But what is true for any job, is just as true here: good preparation is half the work. Nothing can go wrong if you take the right steps. Have a look at the sections below for a clear and step-by-step explanation of working with Silka elements.

Want to know more?

Do you have questions about the possibilities or the processing of Silka elements? If so, have a look at the Frequently Asked Questions or contact us. We are happy to tell you more about this and other building solutions from Xella.