Copyright Goodheart-Willcox Co., Inc. 284 Section 4 Construction Details Goodheart-Willcox Publisher Figure 14-13. Brick veneer attached to wood framing using corrugated wall ties. Rigid insulation over wood framing with house wrap is being used as air infiltration and water resistant barrier. A 1″ air space between house wrap and brick veneer with flashing directs moisture to weep holes. Break line Rigid insulation or exterior sheathing House wrap or water-resistant barrier 1" air space Corrugated metal wall ties Rigid insulation Flashing Break line Fill cavity below flashing with mortar Wall base flashing Foundation wall 1/2" Cement parging Drywall Fiberglass insulation Subfloor Header Sill Bituminous waterproofing Weep holes Moisture Resistance Brick veneer wall assemblies are drainage-type walls. These walls are resistant to rain penetration. Proper drainage requires maintenance of the clear air space between the brick veneer and the backing. Flashing and weep holes work with the air space to resist moisture penetration. Brick veneer with wood or metal frame backing is usually built with a minimum of 1″ of air space.