Garage concrete floor repair - November 13th 2000



Question from: Dennis
Edmonton, AB

Dear Shell,

Great show Shell. I have 3 questions to ask you about concrete.
1. My garage floor is spalling where my car sits in the garage. I did copy down your procedure to repair this from a previous show but I misplaced it, Could you forward that to me again.
2. The concrete floor where the garage door comes down is all cracked and broken. I did repair it once before with finishing concrete but I ended up with the same result. This part of the concrete floor is only 4 inches deep with the grade beam underneath it. There seems to be considerable widening of cracks as soon as winter arrives. What should I do?
3. I have a sidewalk leading to the house, running parallel to the garage. It is covered by an overhang. At the first step up to this sidewalk it is cracked about 6 inches from the edge. Is there some product I can use to prevent this crack from further deteriorating my sidewalk?

Thanks, Dennis

Dear Dennis,

Acid wash the floor using a mixture of muriatic acid 1/3 to 2/3 water and allow to dry. Mix Weldbond 5 parts water to 1 part Weldbond; pour onto slab and spread with a roller. Apply a trowel coat of bonded topping mix made by Target or Sakrete. Keep the area moist with a light spray of the hose every hour for eight hours. After one week apply a solvent based sealer. Repair the cracks with a polyurethane caulking. If the cracks are open, more than pack with poly foam dowel before caulking with the polyurethane. Sprinkle sand on top of the curing caulking.

Its Just That Easy.

Shell Busey