Sirewall – Rammed Earth

It took a long time … but now two specialists, Meror and Keenan, have traveled from Canada to start building houses with the famous “Sirewall” construction method.

With this construction technique it is possible to build faster and more efficiently with rammed earth, which, contrary to the usual earth building method, effectively withstands the weather conditions in Paraguay.

Meror and Keenan now teach the settled settlers to use the Sirewall technique. With this construction method, it will not only be possible to build houses with thick, insulated thick walls, but also to provide optimal heat and cold insulation. In addition, it will be possible to build hobbit houses, tulus and domed buildings, which are really very imposing.

What does SIREWALL mean?

Structural   Insulated   Rammed   Earth

SIREWALL is an insulated, technical sandstone wall with the strength of concrete, which forms the basis for an attractive, high-performance building structure and shell.


Rammed earth, structurally insulated.

SIREWALL is a structural sandwich wall system with a thickness of 20 to 24 cm. Local floors in combination with 9% cement are compacted on both sides of a hidden insulation core. Stabilized with compacted earth and rebar, with 4 “solid insulation in the center of the wall (rebars are used in seismic areas).

We offer the choice. The choice to build as if the future, the environment and people’s well-being are important.

Our Core Values

Without any ifs or buts, we have dedicated ourselves to the thinking of the seventh generation (200 years). These are the values ​​that define us: innovation, durability, beauty, health and environmental friendliness. Discover how these shape our vision and our work.

SIREWALLs are a complete wall system with the strength and beauty of sedimentary sandstone that catches the eye.

This unmistakable, visceral connection to the earth is also the outer and inner surface of a SIREWALL building – no seals, cladding or drywall are required.

These high performance walls are built with a system that has been researched and developed for more than 25 years, with a thermal mass and efficiency that surpasses any other wall system. In combination with the SIREWALL® system for quality control and soil mixing, walls are built that exceed the current standards for energy efficiency and compressive strength.

The SIREWALL system has been further developed by SIREWALL experts over the past 28 years and can be seamlessly integrated into unique designs and modern surfaces with timeless charm.

SIREWALL has been a global technological leader in the field of insulated rammed earth since its invention in 1992 and was the only supplier for the first thirteen years. SIREWALL holds four patents for this special technology, which is groundbreaking in this emerging industry in terms of thermal and structural excellence.


The SIREWALL system starts with secured, reusable molds that are filled with a mixture of moist soil. Once the soil mix is ​​compacted, structural rammed earth walls are created that will last for several lifetimes without the need for maintenance.

SIREWALL earthworkers use the world’s leading SIREWALL earth mix technology to achieve the optimal mix for the strength and structural requirements of the project. We can make almost any color you want and have recommendations for achieving quality and economy on a project-specific basis.

SIREWALL Base Admixture (SBA) is an additive that we have developed. It is worked into the entire wall to limit efflorescence and to achieve hydrophobic properties. The hidden core of insulation in the center of the wall is usually (but not necessarily) made of polyiso foam.

Forming, delivery and mixing are determined on a project-specific basis. Pneumatic and hand rammers are selected on a project-specific basis.


Try setting dirt on fire.


SIREWALLs get wet. The tide is receding. SIREWALLs are drying out. No drama.

Cyclones / strong winds

SIREWALLs are approximately 20 times the mass of stud walls and 4 times the width of the foundation, so it is much more difficult for winds to overcome them.

Extreme temperatures

The comfort is retained even in the event of a power failure, as the dynamic insulation is at least twice as high.

Sound and Vibrations

SIREWALLs block the sound through mass and different vibrations. Solid materials vibrate at such a low frequency that the sound energy can be largely absorbed. The layering of rammed earth, foam and rammed earth makes it almost impossible for sound vibrations to penetrate through the shift in density.


SIREWALLs are healthy for people – no red list chemicals (carcinogenic substances, environmental hormones, heavy metals, etc.) in the wall structure.


SIREWALL can withstand horizontal driving rain and extreme temperatures for hundreds of years. It has the strength of concrete and is also provided with a hydrophobic additive. You could say that it will last 1,000 years.


Solid walls with ample insulation form a thermal flywheel. This increases energy savings and human comfort through stable indoor temperatures and radiant heating (one is heated by the surrounding surfaces and not by warm air).

Climate resistance

SIREWALL is extremely resistant to fire, floods, cyclones and extreme temperatures.


The largest construction to date with Sirewall is …

Telenor Head Office, Islamabad

A new record for the tallest and largest rammed earth construction in the world!

Sirewall - Stampflehm - Lehmbau

With its 30.5 m, the communication tower sets a new record for the tallest rammed earth construction in the world.

Sirewall - Stampflehm - LehmbauTechnical details:

Total area of the project: approx. 55,742 square meters

SIRWALL has developed low-tech delivery protocols based on the availability of ample manual labor.

Dimensions of the enclosing wall: 0.6 m by 3 m with a length of about 750 m.

Thickness of the tower walls: 90 cm

Tower height: 30.5 m


Further examples:

Sirewall - Stampflehm - Lehmbau

The first construction in El Paraiso Verde was a test wall to test the local soil and its resilience. At first it is a small test project, but it can be seen …


We are excited to see when the first houses will be built in El Paraiso Verde.