Cultured Stone
EZ Scaffold Corp.
EZG Manufacturing
Federated Insurance
Fraco USA, Inc.
Hydro Mobile, Inc.
Kennison Forest Products, Inc.
Mortar Net Solutions
Non-Stop Scaffolding
Norton Clipper
Southwest Scaffolding
The Belden Brick Company
Xtreme Manufacturing
Find-a-Contractor Masonry Buyer's Guide

Drainage Cavity

Masonry cavity walls consist of two wythes of masonry separated by an airspace connected by corrosion resistant ties. The internal drainage cavity is designed to intercept any water that penetrates through the exterior wythe. Flashings, weep holes and waterproof membranes are used at the base of the cavity to direct water out of the cavity and prevent water from getting into the building. A 1" minimum clear space is required by code.

Mortar Fins & Droppings

Mortar droppings from the construction process can fill or bridge across drainage cavities, clog weep holes and prevent the escape of water from the cavity. Mortar fins that bridge the cavity, usually at wall ties, can act as conduits for water to the interior wythe. Masonry cavities should be built free of excess mortar that may impede moisture flow or permit water to saturate the backup.

Mortar Deflectors

Mortar deflectors or nets are often used at the base of cavities to catch mortar droppings which would otherwise clog cavities and weeps and prevent escape of water. Many materials are used for this function including netting or mesh of various types that catch the mortar and prevent it from settling at the base of the cavity. Pea gravel is also traditionally used which, being larger than weep tubes, holds the mortar away from the weeps and keeps them clear. This is a less effective method and mesh or net is preferred.

Companies Offering Drainage Materials, Prefabricated

Company City State
MCAA Member Mortar Net Solutions Portage IN
MCAA Member Advanced Building Products, Inc. Sanford ME
MCAA Member Lurvey Supply Des Plaines IL
MCAA Member MASONPRO, Inc. Northville MI
MCAA Member Masonry Accessories, Inc. Orlando FL
MCAA Member Raymond Builders Supply Geneva OH
MCAA Member Thompson Building Materials, Inc. San Diego CA
MCAA Member Waldo Bros. Company Boston MA
Keene Building Products Mayfield Heights OH

Working together to train our future workforce.”

Curtis Hoover
Center of Applied Technology - North
MCAA member since 1999

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