Learn More About Concrete Repairs

Q: What is the process for fixing cracks in concrete?
A: If you have hairline cracks in your garage floor, you can seal them with epoxy compounds, even if they have slightly separated horizontally. If your cracks are caused by excessive and rapid hydration of the original concrete mix (shrinkage cracks) then you can successfully repair them.

Q: What is the best way to repair cracks in my poured concrete basement wall?
A low-pressure concrete crack injection using either epoxy or polyurethane resin is the best method. You must do two things: stop moisture penetration and eliminate or accommodate any wall movement. Injections are done from inside the basement. The procedure will fill the crack from front to back and bottom to top thus completely sealing the crack. In addition, when using polyurethane foam, you will fill any void behind the crack.

Q: What causes surface repairs using hydraulic cement, caulking, coatings or patching to fail?
It’s true that these methods consistently fail – and in a short amount of time – due to the expected expansion and contraction movement of walls. Even though the movement is minimal, it causes shadow cracks and leaks. Our low pressure crack injections are permanent as the crack within the wall is completely filled in.

Q: How does crack injection work?
The two-part liquid resin is introduced through small ports glued over the crack and flows into the wall from inside the basement. The resin works through the wall to the outside and then solidifies, filling the space within the crack.

Q: How long can I expect a crack injection repair to last?
This method lasts the life of the structure when property installed.

Q: Should I use a polyurethane or epoxy injection?
Both are used to stop water. Polyurethane foam gives you the advantage of expansion and fills potential voids within and beyond the wall. Expansion also prevents polyurethane from leaking before curing is complete and will fill the crack more thoroughly. Structural repairs require epoxy as it will fuse the crack back together.

Q: How can I tell if the crack needs structural repair?
• Warning signs include the following:
• Horizontal cracks
• Cracks of 1/2" or greater
• Cracks that are wider at the top than the bottom
• Offset cracks

When you consult with Contech Restoration Inc in Edmonton, we can inspect your unique situation and provide the expert advice you need. Keep in mind that low-pressure injection methods will not work on cracked block foundation walls.

Q: Do I need to be concerned about a small crack?
Even small, barely visible cracks can be treated with crack injection, which will protect the integrity of your structure.

Q: When do cracks develop?
Cracks commonly develop during the first two years after concrete is poured.

Q: Will the crack continue to grow?
Yes. Freezing, thawing, changes in moisture and pressure from soil will factor into the growth of the crack.

Contact Information

Contech Restoration Inc
12837 57 St. NW
Edmonton, AB T5A 2E8