Wall Systems

Cavity Wall: Brick Veneer/Reinforced Cast in Place Concrete

The excellent insulating value and heat capacity of brick and concrete make this system a good choice for schools and commercial buildings.

Cavity Wall: Brick Veneer/Reinforced Cast in Place Concrete
Dove-tail anchor wall ties Flashing at base of wall

Recommended Building Types

Benefits

Special Considerations

Definition and Assumptions

Backup: Reinforced 8" thick concrete wall. #5 reinforcement at 12 inches o.c. each direction, 2 mats of steel

9-gauge triangular ties in dovetail slots embedded in concrete. Install the dovetail slots vertically @ 24" o.c. Install ties in the slots @ 16" o.c.

Veneer: Cored modular brick 4" x 2-1/3" x 8" (nom.)

Insulation: 2 inch extruded polystyrene rigid insulation in 3 inch drainage cavity

Flashing: Base flashing and weeps

Mortar: Type N, Portland cement/lime, plain gray

Joints: Concave tooled

Regional Variations

Fire Rating (hours)

4 hours

Sound Transmission Class (dB)

STC 64.6

STC=(weight of wall)0.223x21.5

Wall Weight (lb/sq. ft.)

139 lb/sq. ft.

Energy Rating

R-value: 11.14 with 2" expanded polystyrene rigid insulation (See note)

Calculation:

Outside Air =0.17
Brick =0.44
Air Gap =0.97
Insulation =8.00
Gyp board =0.45
8 inch concrete =0.88
Interior Air =0.68
Total =11.14

R-value: 13.14 with 2" extruded polystyrene rigid insulation (See note)

Calculation:

Outside Air =0.17
Brick =0.44
Air Gap =0.97
Insulation =10.00
8 inch concrete =0.88
Interior Air =0.68
Total =13.14

Note: The type of rigid insulation you install affects the wall’s insulating capacity (the R-value). Polyisocyanurate insulation gives you 8.0 R per inch (12.0 R for 1.5" or R16 for 2"). Expanded polystyrene insulation is worth 4.0 R per inch (6.0 R for 1.5" or 8 R for 2"). Extruded polystyrene yields 5.0 R per inch (7.5 R for 1.5" or 10 R for 2"). Use either thicker insulation or more expensive polyisocyanurate to achieve a higher energy rating.

Green/LEED Rating

Design Tips

Construction Tips