It is important to follow best practices when designing a masonry wall to prevent debris from blocking through-wall flashing and weep holes. A mortar net plays a critical role in maintaining drainage within the air cavity of masonry wall assemblies.
Specify the installation of mortar nets in the air cavity layer of the masonry wall. Mortar nets are mesh-type products designed to collect mortar debris generated during masonry installation.
By capturing excess mortar, a mortar net prevents debris from blocking flashing systems and weep holes. Mortar nets must be installed at all locations where through-wall flashing and weep holes occur in the building.
Ensure the mortar net is installed properly and securely to prevent sagging or drooping. Improper installation can result in standing water, which may lead to mold growth or corrosion.
Mortar nets typically use a dovetail shape in elevation, helping prevent collected mortar debris from forming a continuous water seal that would restrict drainage.
Work closely with the mortar net manufacturer to determine the appropriate product for your specific project requirements. Inspect the masonry wall during and after construction to confirm the mortar net is correctly installed and functioning as intended.
By following this design guidance, designers can help prevent debris accumulation in the air cavity and support the proper function of through-wall flashing and weep holes.
In summary, mortar nets are essential components for maintaining drainage and durability in masonry wall assemblies.
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