To make EIFS more resistant to impact damage, most EIFS manufacturers supply a thicker mesh referred to as “Heavy-Duty Mesh” or “High-Impact Mesh”. This is a 20-oz mesh that is installed in addition to the standard 4-oz mesh used over the insulation in EIFS to make it more durable and requires an additional layer of basecoat. 2 layers of 20-oz mesh can be added to maximize the impact resistance. Testing with such installation methods has shown that it is effective in preventing damage from a sledge hammer, screwdriver and even projectiles.

The following video from BASF demonstrates some testing using 2 layers of 20-oz mesh.

Heavy duty mesh is only required where there is a higher chance that something large or heavy can damage the wall, or where vandalism is a concern. Typically this is the first 6 feet in height of a wall, with a focus around areas of high traffic requiring durability such as sidewalks, loading docks and doors. This will minimize the investment required, compared to doing a full height of 20 feet, while still providing the coverage needed.

To make EIFS more resistant to impact damage, most EIFS manufacturers supply a thicker mesh referred to as “Heavy-Duty Mesh” or “High-Impact Mesh”. This is a 20-oz mesh that is installed in addition to the standard 4-oz mesh used over the insulation in EIFS to make it more durable and requires an additional layer of basecoat. 2 layers of 20-oz mesh can be added to maximize the impact resistance. Testing with such installation methods has shown that it is effective in preventing damage from a sledge hammer, screwdriver and even projectiles.

The following video from BASF demonstrates some testing using 2 layers of 20-oz mesh.

Heavy duty mesh is only required where there is a higher chance that something large or heavy can damage the wall, or where vandalism is a concern. Typically this is the first 6 feet in height of a wall, with a focus around areas of high traffic requiring durability such as sidewalks, loading docks and doors. This will minimize the investment required, compared to doing a full height of 20 feet, while still providing the coverage needed.

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