Search Results for: core drilling

Introduction This article compares three concrete repair options for a heaved sidewalk: mudjacking, polyjacking, and full replacement. Mudjacking uses a cement slurry to lift the slab from below, while polyjacking uses a foam material to fill voids and lift. Full replacement means removing the old slab and pouring a new one. Each method has its […]

Introduction Deck stair footings are concrete supports placed below the frost line to keep stairs from heaving. This article explains how to do that without digging more than necessary. Check your local code and manufacturers for the exact depths and mix. Understanding frost depth, footing size, and concrete choices matters for a solid, long-lasting set.

Introduction Edge distance for sleeve anchors is the minimum distance from the edge of the material to where the anchor is installed. This distance helps prevent cracks, splits, and blowout during loading. Understand that following the edge rule is essential for holding power and long life of the anchor. Look up the recommended edge distance

Introduction Blistering on a finished concrete floor is when paint bubbles and lifts away months after you painted. Two common culprits are vapor drive from the slab and leftover cleaning residues. Both causes require different fixes, so identify which is at fault before touching up. To tell which is the cause, check for moisture or

Introduction Wedge anchors spin in weak concrete when the anchor’s wedging action can’t grab solid material. That spinning often means the fastener won’t hold the load you expect. In practice, it’s a sign the substrate or hole preparation isn’t up to the task. If they spin, stop and check that the hole size and depth

Introduction Hole cleaning level refers to how clean the hole is before you install the anchor and that cleanliness can influence pullout strength. Different anchor types require different cleaning steps, and following the manufacturer’s instructions matters. In practice, I check for dust and debris, brush or air-blow the hole, and wipe it out until the

Introduction Tapcon screws are concrete screws designed to bite into hardened concrete. They tend to strip when the hole is too large or when the screw is driven without a clean, bored hole and straight alignment. That makes it hard to hold heavy fixtures and requires careful installation. To get real holding power, start with

Introduction Blisters form when moisture underneath the coating pushes through and splits the film over damp wood near concrete. You’ll see raised bubbles or pockets as the coating tries to cure in a wet, alkaline environment. Work is risky if you skip drying and proper surface prep. Look for breathable coating options and follow proper