Single Flemish Bond:
* Arrangement: Alternating headers and stretchers in each course, with headers centered over stretchers in the course below.
* Pattern: Creates a diagonal pattern with a continuous vertical line of headers.
* Appearance: Simple and elegant, often used for aesthetic purposes.
* Strength: Slightly weaker than double Flemish bond due to fewer header-to-header connections.
* Common Uses: Decorative walls, fireplaces, and garden walls.
Double Flemish Bond:
* Arrangement: Two courses of single Flemish bond are combined. In each course, headers are centered over stretchers in the course below. The headers in the second course are offset from those in the first course.
* Pattern: Creates a more complex, interlocking pattern with a continuous vertical line of headers, but with more header-to-header connections.
* Appearance: More robust and substantial appearance compared to single Flemish bond.
* Strength: Stronger than single Flemish bond due to the increased number of header-to-header connections.
* Common Uses: Load-bearing walls, chimneys, and structural applications where strength is crucial.
Here's a summary table:
| Feature | Single Flemish Bond | Double Flemish Bond |
|---|---|---|
| Brick Arrangement | Alternating headers and stretchers | Two courses of single Flemish bond |
| Pattern | Diagonal, continuous vertical line of headers | Interlocking, continuous vertical line of headers |
| Appearance | Simple, elegant | Robust, substantial |
| Strength | Slightly weaker | Stronger |
| Common Uses | Decorative walls, fireplaces, garden walls | Load-bearing walls, chimneys, structural applications |
In essence, double Flemish bond is a stronger and more complex variation of single Flemish bond. It provides greater structural integrity and a more pronounced visual pattern.