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Pressure washing exposed aggregate concrete surface

Creating an Exposed Aggregate ‘Window’ in a Small Repair (Matching Existing Finish)

Introduction An exposed aggregate window is a small patch that reveals decorative stones after removing a portion of concrete to match the surrounding finish. Plan to cut a window in the existing slab, clean and dampen the area, and set up a simple form to keep edges neat. Check local rules and the patch will

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Stamped concrete patio with curved edge and garden bed

How to Feather a Concrete Patch Without a Weak Edge (Undercuts and Micro-Overlays)

Introduction Feathering a concrete patch means shaping the edge with undercuts and a micro-overlay so the repair blends with the surrounding slab. It’s about creating a gradual transition, not a hard line or a loaded patch. You’ll want a clean bond, good surface prep, and a plan for the edge quality as you go. This

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Wooden formwork with rebar grid for concrete slab

Concrete ‘Dusting’ in Basements: Hardener Options and Prep That Actually Works

Introduction Dusting in basements is when the top layer of concrete powder flakes away, leaving a dusty, chalky surface. It’s usually caused by weak laitance, moisture, improper finishing, or wear from foot traffic. Choosing a floor hardener and a solid prep plan helps harden the surface and reduce future dust. Prep work is critical: clean

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Four concrete test slabs with markings on surface

DIY Carbonation Test for Old Concrete (What It Means for Anchors and Repairs)

Introduction A carbonation test shows how much the concrete has hardened through exposure to CO2, which can affect how anchors hold. This article walks you through what that means for anchors and simple repairs, in plain DIY language. You’ll learn what to check on materials, tools, and local rules when you plan a fix. The

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Concrete columns with exposed vertical rebar against sky

Fixing Rust ‘Telegraphing’ Through Concrete Patch Repairs (When Rebar Is Too Close)

Introduction Rust telegraphing through concrete patches happens when corroded rebar pushes outward, showing up as stains, cracks, or rough patches on the surface. This is a sign the patch is not fully sealing the reinforcing and moisture is getting to the steel. In this article we’ll explain what to look for and how to approach

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Fresh concrete pouring onto existing concrete slab

Pouring a Small Concrete Slab Over Existing Concrete: Bonding, Thickness, and Joints

Introduction Pouring a small concrete slab over existing concrete means laying a new concrete layer on top of an existing slab. Before you start, clean and roughen the surface so the new mix can grip. Check the old slab for cracks and moisture and fix obvious issues before pouring. Think about how thick you pour

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Close-up of concrete surface with a patch of spalling damage

Concrete Spalling at Garage Door Thresholds: Why It Happens and How to Rebuild the Edge

Introduction Spalling is when the surface concrete flakes, chips, or peels away at the garage door edge. The damage comes from moisture intrusion, freeze-thaw cycles, or heavy traffic over time. You’ll notice rough edges where the edge of the slab meets the door opening. To rebuild the edge, remove loose material and clean the area

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