Joint filling and expansion joint repair for warehouse and industrial floors

Why joints fail

Saw-cut control joints are placed so the slab cracks in a straight line as it shrinks. Left open, those joints have unsupported edges. Every time a hard forklift wheel crosses, it strikes the far edge and chips it. Over time the joint widens and spalls, damaging equipment, shifting loads and getting worse every week.

The fix is a semi-rigid filler that supports the joint edges while allowing slight movement. Semi-rigid polyurea and epoxy joint fillers are made for this. Soft caulks and sealants are not, because they deflect under wheels and give the edges no support.

Our joint filling process

Joints are saw-cleaned or routed to remove old filler, debris and dirt down to clean concrete. Spalled edges are rebuilt with epoxy mortar first. The filler is installed full depth or over a backer as specified, overfilled slightly, then shaved flush with the floor once cured for a smooth transition.

Timing matters on new slabs. Concrete keeps shrinking for months, so filling too early can cause the filler to separate from the joint wall. Where that happens, we refill the gap. Expansion and isolation joints, which must move more, are treated with flexible sealants or purpose-built joint systems.

Freezers and cold storage need fillers rated for low temperatures. These are best installed with the space at operating temperature, when joints are at their widest. We plan these installs with your facility team to limit disruption to stored product.