SoffCut 24h Floor Saws

The early-entry window normally opens 1–2 hours after trowelling, once the slab carries the operator and the machine while the concrete is still green. One check settles it on site: if the kerf edge pulls aggregate out, you are too early. Heat shortens the window to 45–60 minutes around 30 °C, while at 10 °C it can stretch past 3 hours, so the schedule follows the weather, not the clock.

The "24h" label refers to the first day of curing — the only period in which shrinkage cracking can still be prevented — not to a 24-hour wait before sawing. Soff-Cut technology lets crews onto the slab early, typically 1–2 h after trowelling, where a wet saw would still have most of a day to wait. Every hour of delay raises the chance a crack forms outside the planned joint line.

The skid plate slides along the slab beside the blade and presses the concrete down on both sides of a kerf typically 2–3 mm wide. Soft aggregate stays put at the edge and the joint comes out straight. On early-entry machines the blade turns upwards, unlike a wet saw, so cutting forces push the plate onto the floor instead of lifting it. The plate is a wear part, matched to blade diameter and cut depth of 25–40 mm.

Working without water releases respirable crystalline silica, so early-entry saws are paired with an industrial vacuum using an H- or M-class filter and a hose of roughly 50–70 mm diameter. Extraction cuts operator exposure and keeps the cut line visible, so a string line is easy to follow. Hearing protection belongs on the list too, at noise around 100 dB. The upside of the method stays intact: no slurry, so the floor needs no washing down.