What is Brick Bond? [English Bond, Flemish Bond, Features & Differences

What is Brick Bond?

Bonding is the technique of setting up bricks with mortar to tie them with each other. The vertical joints provided in the brick masonry should not continue in each layer. It is not possible to construct the wall without proper bonding in between bricks.

Many types of brick bonds are used in masonry work but English bond is mostly used in brickwork and is considered to be the strongest bond.

english-bond

English Bond

In this type of bond, alternate bricks are placed as header and stretcher in every course. A queen closer is placed after the header to produce a good overlap. The queen closer is not needed in the stretcher course.

This type of bond is generally used in practice. It is considered the strongest bond in brickwork.

Features of English Bond

  • Headers and stretchers are laid in alternate courses.
  • Queen closer is put next to quoin header to develop face lap.
  • This is the strongest type of bond.
  • Each alternate course of the header is centrally supported over the stretcher.
  • The number of mortar joints in the header course is nearly double that made in the stretcher course.
  • No continuous vertical joints in the structure.

Features-English-Bond

  • No special supervision and skill is required.
  • Appearance on the facing is not pleasing.
  • Less mortar is used.

Flemish Bond

Alternate bricks are placed as header and stretcher in every course. This bond is provided a better look than the English bond. However, it is not much strong as the English bond as it contains a lot of stretchers.

Flemish-Bond

Flemish bonds are classifieds into two types

  1. Single Flemish Bond
  2. Double Flemish Bond

Single Flemish Bond

The single Flemish bond is a combination of the English bond and the Flemish bond. In this type of construction, the front exposed surface of the wall is composed of a Flemish bond and the back surface of the wall contains an English bond in each course.

Single-Flemish-Bond

The minimum thickness needed for the single Flemish bond is one and a half brick thickness. The main purpose of using a single Flemish bond is to give a better aesthetic look on the front surface with the required strength in the brickwork with English bond.

Double Flemish Bond

Double Flemish Bond has the same appearance both in the front and back elevations because each course consists of an alternate header and stretcher. It gives a better appearance compared to the English bond for all the wall thickness.

Double-Flemish-Bond

This type of bonding is comparatively weaker than the English bond.

Features of Flemish Bond

The following are some features of the Flemish bond.

  • Headers and stretchers are laid alternately in each course.
  • Mostly continuous vertical joints appear in the structure.
  • This bond produces a much better appearance than English Bond.
  • The queen closer is put next to quoin header in alternate course to create face lap.
  • Special supervision and skilled labor are required for this bond.
  • Every header is centrally supported over a stretcher below it.
  • Economical, as brickbats are used.
  • Half bats and three-quarter bats are used for walls having a thickness equal to an odd number of half bricks.
  • Progress of work is less.
  • This bond is not strong as English bond.
  • More mortar is used due to the use of bats.

Difference between English and Flemish Bond

English Bond Flemish Bond
Less pleasing look The look is more attractive and pleasing
More strength given for bricks with thickness greater than one and a half brick Less strong compared to English bond
Bond pattern with alternate header and stretcher course Bond Pattern with each course having alternate header and stretcher
Expensive due to full brick use Economical due to brickbats utilized
No supervision and skill is required Required good skilled labor and proper supervision