The one crop that never fails! Laid randomly or coursed, this style is the most common. Found in various sizes and colours, field flint is flint that has not been worked, either by hand or by water (see Cobbles). It is often graded before going into a wall. In rural and agricultural settings field flint is frequently used on domestic and agricultural structures. Miles of long field walls to retain livestock can still be seen in most of the Southern counties.  Regularly laid by estate and farm workers field flint walls make good use of a free source of building material.

Used as early as the 9th Century, field flint styles have evolved from the purely functional (fortifications and agricultural use) to the aesthetic (domestic). Joint size can vary, larger joints meaning a larger aggregate size is used. This is functional when laying and can improve the look of the final product. In coursed field flint construction it is usually quite easy to ascertain if the person laying was left or right handed, a reminder of the human beings who have worked with the stone over the centuries.