Control Joint Filling
Saw cuts and expansion joints are filled with a semi-rigid filler so dirt, water and tires cannot damage the edges and the floor reads as one seamless surface.
The details, in plain English.
Control joints are cut into slabs to let concrete crack in a straight line instead of a random one. Left open, they collect dirt and water and their edges chip under tires. Coating directly over them risks the film cracking along the joint as the slab moves.
We fill joints with a flexible, semi-rigid joint filler that supports the edges and keeps contaminants out, then coat over the filled joint, or follow the joint with a thin cut in the coating where movement is expected. We will explain which approach suits your slab.
Best for
- Garages with saw-cut joints
- Slabs with thresholds
- Commercial bays
- Floors with visible joint chipping
What you get with this service.
Supports the edges
Filler keeps tires from chipping the joint.
Keeps contaminants out
No more trapped dirt and moisture.
Smooth finish
A clean line instead of an open gap.
Designed for movement
Flexible filler handles normal slab movement.
From first look to finished floor.
- 1
Clean the joint
Vacuum all dust and debris.
- 2
Fill
Install semi-rigid joint filler.
- 3
Shave flush
Level the filler with the slab.
- 4
Coat or relief cut
Coat over or leave a thin relief cut.
Questions, answered
Should the coating cover the joint?
In garages we usually fill, shave flush and coat over, or add a thin relief cut. Heavily moving joints may be better left filled and visible.
Will the joint crack through the coating?
Sometimes a joint will telegraph a thin line. We design for it and tell you what to expect.
How do I get a price?
Fill in the form or call 800-207-0499. We schedule a free assessment, look at the slab and send a written quote.
How long does it take?
Most two-car garages are done in a day. Large or heavily repaired floors can take longer, and we tell you the schedule before we start.
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Send the form for a free assessment, or build your design first in the Floor Designer.