Looking for help to source some cheap concrete blocks for construction of a retaining wall. I am after the type that are about 15-20 cm thick and about 40cm wide...and have two holes in them (for running the vertical rebar through).
They are rough-finished. Seen them in Chiang Mai, but not in Udon as yet.. Have seen some nicely finished interlocking blocks at a small building supplier in Udon, but at 40baht a block just too expensive.