Search Results for: surface prep

Introduction A leaking cold joint at slab-to-wall is water intrusion at the bond between a concrete slab and the wall caused by gaps or cracks near the joint. This article explains why surface caulk often fails and what better repair approaches look like for DIY work. Identify leaks by looking for damp patches near the […]

Introduction Patching vertical surfaces overhead means repairing overhead concrete with a patching mix to restore a flat surface. Use a mix rated for overhead bonding and follow the product label for prep and cure. Work from bottom to top as needed, and plan for potential sag during setting. Bonding strength and sag control come from

Introduction Surface retarders are chemicals you apply to the top of fresh concrete to slow the surface set. They let you finish the body of the slab without creating a soft, uneven surface, helping you avoid cold joints. Different formulas work differently on color and texture, so understand what you’re using before you apply it.

Introduction CSP stands for Concrete Surface Profile, and it describes how rough or smooth a concrete surface is. Choosing the right CSP helps coatings and overlays grip well, without grinding away too much material. This article keeps it practical for DIYers and focuses on getting the profile right without overdoing it. The ICRI CSP scale

Introduction Concrete surface contamination tests tell you whether a surface is clean enough for bonding by revealing any residual oils, silicones, or waxes. For epoxy or other adhesives, you must verify cleanliness requirements with the product label and local rules, because expectations vary. If unsure, follow a basic check: a dry, dust-free feel and a

Introduction Surface resistivity testing measures how easily electricity moves across the concrete surface to indicate how resistant the surface is to chloride ingress. As a DIY homeowner, you can view it as a quick check that helps you judge durability without tearing into the slab. Think of it as a simple, hands-on indicator you can

Introduction Crushed glass as aggregate is using recycled glass pieces as the rock substitute in concrete. There is an alkali-silica reaction risk with crushed glass, which varies with glass type, particle size, and the concrete mix. Always check product labels, supplier instructions, and local rules for ASR guidance and suitability. Mitigation strategies include choosing less

Introduction Concrete pads on clay soil require a proper base prep to minimize settlement and cracking. The base should be clean, graded, and compacted to create a stable, drainage-friendly surface. If you’re unsure about soil conditions, check with local rules or a product label for guidance on acceptable fill and compacting methods. Understanding what causes

Introduction Drilling concrete cleanly means making precise holes without chipping the surrounding surface. Start by assessing the job and marking hole locations clearly, so you know exactly where to drill. Keep the area clean and set up a stable work surface to reduce wobble as you begin. Choose drill settings and approach carefully, deciding between