This distinctive, visceral connection to the earth is also the exterior and interior finish of a SIREWALL building – no sealants, siding or drywall required.
These high performance walls are constructed with a system backed by over 20 years of R&D, producing thermal mass and efficiency beyond any other wall system. This combination, along with the SIREWALL® System for quality control and soil blending, builds walls that exceed current standards for energy efficiency and compressive strength.
The SIREWALL System has been refined over the last twenty years by SIREWALL’s Earth Masons, working seamlessly with unique designs and modern finishes that have timeless appeal.
SIREWALL has been the global technological leader of insulated rammed earth since its invention in 1992 and was the only practitioner for the first thirteen years. SIREWALL has four patents on this specific technology that leads the way in thermal and structural excellence in this emerging industry.
SIREWALL Earth Masons use SIREWALL’s world leading soil blending technology to achieve the optimal blend for the project’s strength and texture requirements. We can create almost any colour desired, and do have recommendations to achieve quality and economy on a project specific basis.
SIREWALL Base Admixture is used to limit efflorescence and for its hydrophobic properties. The hidden core of insulation at the center of the wall is most typically (but not necessarily) polyisocyanurate foam. Forming, delivery, and mixing are determined specific to the project. Pneumatic and hand tampers are selected specific to the project.
While most people are drawn to SIREWALL by its beauty, they may not realize that this inherent beauty is actually the result of over 20 years of investment in R&D. To improve functionality, the strength of Structual Insulated Rammed Earth needs to be so much higher than its uninsulated cousin, so we continually refine our standards to ensure superior strength and performance.
Our Standards are the highest, and we ensure SIREWALL Earth Masons, professionals who are the trained more than any other in the industry, meticulously follow them.
Green Building enthusiasts inspired to break ground and build a rammed earth structure with the best of intentions may be missing key components to create healthy, energy efficient homes and buildings that will last for future generations.
Stabilized Rammed Earth
Insulated Rammed Earth
Structural Insulated Rammed Earth
1mPa – 3mPa
145psi – 435psi
3mPa – 7mPa
435psi – 1,015psi
3mPa – 28mPa
435psi – 4,060psi
20mPa – 30mPa
2,900psi – 4,350psi
|R-value (static)||R6||R6||R12 – R25||R33 & UP|
|R-value (dynamic)||R9 – R13.5||R9 – R13.5||R38 – R56||R50 – R74|
|Erosion Resistance||A garden hose erodes this||Garden hose resistant||Widely variable||2,500psi pressure washer resistant|
|Quality Control Protocol||Unlikely||Possible||Unlikely||Yes|
|Risk of efflorescence||Possible||Possible||Possible||Unlikely|
|Air barrier detailing||No||No||Possible||Yes|
|Pre-build soil optimization||No||Unlikely||Minimal||Yes|
|Vapour drive barrier||No||No||Unlikely||Yes|
|Engineer and Building Permit friendly||No||Yes||Unlikely||Yes|
|Large project capability||Possible||Possible||Unlikely||Yes|
|Standards & Specifications||No||Yes||Variable, Self -monitored||Yes|
|Possible patent infrigement||No||Yes||Yes||No|
Depending on how a rammed earth wall is built, these factors can dramatically affect overall strength and durability: