Matt L.

Introduction Shrinkage edge cracking is cracks that form along the edges as concrete hardens and dries. This happens when moisture leaves the mix and the surface contracts more than the underlying material. It’s common in patches, especially with rapid drying or temperature swings. Cracks come in different kinds, like hairline shrinkage cracks or wider splits […]

Introduction Concrete scaling is shallow surface flaking on an exterior driveway, walkway, or slab. It usually appears after wet, freezing weather as thin flakes, a chalky surface, or small areas of exposed aggregate. The practical response is to make the area safe, determine whether the concrete beneath the flakes is sound, correct drainage or deicer

Introduction Delamination is the surface layer of concrete peeling or separating from the underlying concrete, creating a patchy, hollow feel. It often shows up as a dull patch that may flake or sound hollow when tapped. Lightly tapping suspect areas can help you spot where the top lift isn’t bonded well. To diagnose, look for

Introduction A cold joint in concrete is a weak seam where fresh concrete meets earlier poured concrete. It happens when there is a delay or poor bonding between pours. In small pours, clean edges and proper timing help prevent it. Prepare the edge by cleaning and roughening the previous pour so the new concrete can

Introduction Bugholes on formed concrete are small air cavities that mar the surface after form removal. They happen from trapped air, sticky release agents, or improper vibration. In DIY work, you can reduce them by adjusting how you vibrate, how you release the form, and how you mix your concrete. Use the right vibration technique

Introduction Concrete edge chipping happens when the outer edge of a slab flakes or breaks under impact, vibration, or uneven support. That damage is usually a sign the edge wasn’t held firmly during curing or took too much load from the sides. We’ll look at practical ways to build stronger edges so the sides stay

Introduction Broadcasting sand on concrete is the practice of spreading loose sand across a surface to improve traction. It can help when the surface is slick, but it can also track into the house and create a mess if overdone. Best times to broadcast sand are when the surface is dry and conditions won’t quickly

Introduction Steel trowel burn is when the surface of fresh concrete darkens after smoothing with a steel trowel. The dark patch comes from heat and friction that affect the surface paste as you work it. That burn can also create a slightly different texture or sheen if the trowel is held too long in one

Introduction Mag floats and steel trowels are two finish tools used to shape concrete as you close out a pour. Mag floats tend to leave a smoother, more forgiving surface, while steel trowels aim for a harder, slick finish. Think about the surface quality you want and how you’ll use the slab, then pick the

Introduction Floating and troweling are concrete finishing steps that shape and smooth the surface. You start floating after the concrete begins to stiffen and can hold its edge, then you move to troweling to achieve a smooth, even finish. Stop troweling when the surface looks uniform and has the desired sheen, without overworking it. Always