Search Results for: scarifying

Close-up of a concrete floor grinder on dusty floor surface

Concrete Overlay Failures: Why toppings debond and how to prevent it

Introduction Debonding in concrete toppings happens when the new layer separates from the existing slab. This article explains why that happens and how to prevent it, with practical steps you can check on a home job. In plain talk, it often comes from not prepping the surface or skipping the right profile. Surface preparation is […]

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Worker standing on concrete formwork pouring concrete

Concrete Spalling Without Rebar: How deep to remove and how to feather the repair

Introduction Spalling without rebar happens when the surface concrete flakes away, leaving a damaged area that needs patching. You’ll want to remove enough material to reach sound concrete and to create a gradual feathered edge for the new mix to blend in. Check the extent by probing the edge and looking for underlying cracking or

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yellow stained concrete surface with varying texture

Concrete Surface Delamination: Causes, diagnosis, and repair that lasts

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

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Concrete being poured from chute onto prepared slab area

Concrete Against Existing Slabs: How to pour next to old concrete without cracks

Introduction Pouring new concrete next to an existing slab requires careful planning to prevent cracks. You’ll need a clean joint, proper isolation, and a compatible mix to control movement. Inspect the existing slab for movement, moisture, or coating and plan the joint and bonding approach accordingly. Always verify with the product label, manufacturer instructions, or

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Room with drywall installed and joint compound patches visible

Repairing Raveled Joints: Rebuilding joint edges without creating a weak strip

Introduction Repairing raveled joints means rebuilding the edge of a concrete joint where the surface material has torn loose, without creating a weak, thin strip. Raveling happens when the joint edge flakes or spalls and exposes loose material that won’t hold up under movement. This is a hands-on job: you’ll remove the loose stuff, clean

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Gloved hand scrubbing white concrete wall with green sponge

Concrete Paint Prep: Cleaning, profiling, and drying for adhesion

Introduction Concrete paint prep is the process of cleaning the surface, creating a slight profile for the paint to grip, and ensuring it dries cleanly before coating. This hands-on approach helps adhesion and long-lasting results, not just a quick splash of color. Check the surface condition, the moisture level, and follow the paint label for

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Close-up of rough textured concrete surface showing small pebbles

Concrete Surface Profile (CSP): What It Means and How to Achieve It

Introduction CSP, or Concrete Surface Profile, is the roughness pattern of a freshly poured concrete surface that helps coatings grab hold. It describes how the top layer is prepared to receive a finish. You’ll influence it by how you treat the surface during finishing and, if needed, with light grinding or etching to adjust texture.

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Green paint roller applying green paint on white wall

Plastering Over Old Calcimine Paint: Identification Tests and Bonding Fixes

Introduction Plastering over old calcimine paint means confirming the paint is the flaky, powdery lime-based finish that repels new plaster and then removing or treating it so plaster can bond. I’ll show simple tests to identify calcimine and practical fixes for adhesion problems you can do with common tools. If a product or spec matters,

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Close-up of textured white plaster wall finish

Plaster Feather Edges That Don’t Flake: Keying, Wetting, and Finish Timing

Introduction Plaster feather edges that don’t flake are thin finish edges keyed and bonded to the existing surface, wetted and timed correctly so the new plaster grabs without lifting. Check whether the area needs repair by tapping or scraping loose material and by checking for movement; if substrate is dusty, crumbling, or contaminated you must

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