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What are External Insulated Walls?
An External Insulated Wall (also known as 'Super Insulated Masonry (SIM) Walls' consists of a solid aerated block with a layer of high performing insulation fixed externally to the masonry wall with a choice of finishes.
This system enables the building designer to reduce thermal bridging, increase air tightness, and reduce costs. Further enhanced design details to the floors and roof can then increase the u-value performance of the whole of the building.
The Solid Masonry Core:
A super lightweight aerated block with a thermal value of just 0.09 W/mK. Furthermore, the benefits of the Thermal Mass effect of masonry walls is maximised as the insulation is on the outside.
The External Insulation:
An external surface of Neopor is then fixed to the block. Neopor is a unique insulating material using much less energy in its manufacture and is 20% more effective than similar materials.
There is an extensive choice of finishes for the external wall, including high performance renders in various textures and colours. A wide range of brick slips, conventional brickwork or stone can be used.
A mortar joint of 2mm provides a stronger bond than conventional mortar joints. The thin joint mortar is quick setting, gaining strength within 20 minutes, allowing walls to be built continuously without height restrictions.
The reduced area of the thin joint further improves the u-value of the wall and restricts air leakage. Air leakage tests on site show that 0.6 m³/hr/m² is readily achieved.
To complement the high-performance wall, it is necessary to consider the other elements within the construction in order to achieve low energy, low carbon sustainable homes.
Thomas Armstrong (Concrete Blocks) Ltd
Part of the Thomas Armstrong Group
T: 01900 68211
F: 01900 602672