How To Use Concrete Form Tubes 14 Steps with Pictures
Apr 03, 3. finish filling the form tube to the top. scoop enough of the remaining concrete mix into the tube to bring it just above level. as a rule, it's a good idea to overfill the tube by about 1–2 inches (2.5–5.1 cm). when smoothed, this will create a rounded upper surface that's more attractive and encourages.