Masonry & Concrete FAQs

Wohlwend Concrete – Twin Cities MN

For decades, we’ve done the following in Minneapolis: driveways, sidewalks, patios, curbs and pool decks, and much, much more. With all of that experience, we know you might have some questions. Feel free to browse the answers to some of our frequently asked questions below. Simply click on the question to reveal the answer.


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How long does concrete last?

If maintained properly and cared for, your concrete should last over 20 years.
What’s the difference between cement and concrete?

The terms are often used interchangeably, but cement is an ingredient of concrete, while concrete is mix of sand, gravel or crushed stone and paste. Cement makes up anywhere from 10-15% of the mix. If you hear people say “cement sidewalk” or “cement mixer,” be sure to correct them with the proper terms: “concrete sidewalk” and “concrete mixer.”
My concrete is cracking. Why?

Like any other material, the volume of concrete will change slightly when it dries out (about 1/16 of an inch in 10 ft). This is why we put joints in concrete pavements, floors and other products to let it crack in a straight line at the joint.
How can I remove stains?

You can use the following dry or wet methods:


  • Shotblasting
  • Flame Cleaning
  • Sandblasting
  • Grinding
  • Scabbing
  • Steam Cleaning
  • Low Pressure Water Spray/Blasting
  • High Pressure Water Blasting
  • Chemical Cleaning

Check with your concrete contractor about which method would be best for your particular situation.

How long does it take to construct a new driveway?

Two days for most standard residential jobs. One day is to tear out the existing driveway, while the second is used to pour the new one.
How long do I have to wait before parking on my new concrete driveway?

It’s best to allow up to a week. This way, it will be hard enough to sustain the weight of your vehicle.
How long do I have to wait before walking on my new concrete sidewalk?

Allow up to a day, so the concrete can cure.
I found a de-icer that says it’s safe for concrete. Can I use it?

No, because there’s no such thing as a safe de-icer for concrete. Plain sand should be used for traction, as de-icing will cause flaking.
Do I need to clear snow off my concrete sidewalk or driveway?

Yes. Freeze and thaw cycles will cause your concrete to flake.
Do I need to clear seal my colored concrete?

Yes! It should be applied as needed, especially in the spring before the snow and traffic take effect.


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What is a chimney crown?

The top, flat part of the chimney covered with cement. It’s sloped usually to shed water, while protecting and holding together the chimney top.
My chimney is broken. Is it safe to use?

No! No matter what happened or where it’s broken, it’s extremely unsafe to use. Contact us immediately if your chimney is broken.
What is tuck pointing?

The replacement of mortar between bricks.
What is the most common chimney problem you repair?

Usually problems with the crown.
Do you clean chimneys?

No, we do not.
Can you inspect the inside of my chimney?

This is a service we don’t offer.
How long will repairs take?

This is dependent on the size and scope of the project.
What are the benefits of trash enclosures?

A trash enclosure will prevent rodents and other unwanted intruders from getting into your garbage.