Specialty ProductsNavvy Jack, Half Navvy Jack
Navvy Jack, Half Navvy Jack
Named after a 19th Century, a Welsh immigrant, John Thomas – whose nickname was “Navvy Jack”.
A sand and gravel mix that is ideal for hand mixing concrete and is cheaper than purchasing bags of pre-concrete mix.
Sand and gravel blended in the correct portions to be used in concrete mix. Usually between 4 and 6 parts of Navvy jack to 1 part cement.