Whether designing a soundproof studio (requiring high density) or a super-insulated passive house (potentially favoring lower density aerated blocks), understanding the mass per unit volume is the first step in building a structure that stands the test of time.
It is important to distinguish between two types of density when discussing walls: brick wall density
| Wall Type | Approximate Density (kg/m³) | Approximate Density (lbs/ft³) | | :--- | :--- | :--- | | | 1,800 – 2,000 | 112 – 125 | | Perforated Brick Wall | 1,500 – 1,700 | 94 – 106 | | Lightweight/Thermal Brick | 800 – 1,100 | 50 – 69 | | Cavity Brick Wall (inc. air gap) | Lower effective density due to air void | N/A | 800 – 2