Plaster

Plaster is for cement-based and traditional plastering projects where a smooth or durable surface is the goal.

You’ll find guides on surface prep, bonding, scratch/brown/finish coats, patching, corner details, sanding and finishing, and how to avoid common issues like cracking, poor adhesion, and uneven texture.

If your project is “make this wall look right again,” this is the category to start with.

Closeup of textured burlap fabric with natural fibers

Building a Lime Plaster Sample Board Library: Color, Texture, and Sealer Tracking

Introduction A lime plaster sample board library is a hands-on set of small plaster tests you build to compare color, texture, and sealer outcomes. You’ll lay out different mixes on separate boards and note how each one looks when it dries. Keep the boards labeled and stored where they won’t get ruined by weather. Start

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Putty knife with dried plaster on wooden surface

Leveling Wavy Lath Before Plastering: Shimming, Tension, and Straightedge Control

Introduction Leveling wavy lath before plastering means making the wall lath flat and true so the plaster can set evenly. Start by mapping high and low spots and use thin shims or temporary battens to bring the lath into line. Always refer to the lath type’s instructions and local rules to choose the right method.

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Hand applying plaster to wall with trowel wearing glove

Fixing Plaster After Water Stains: Salts, Stain Blocking, and When to Cut Out

Introduction Water stains on plaster indicate moisture and mineral salts that have bled into the surface. Address the source and let the area dry before patching, and remove any loose or damaged plaster you can see. Choose a stain-blocking product and patch material based on the area, and always check the label for compatibility and

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Worker smoothing plaster on wall with trowel

Stopping “Picture-Frame” Ridges Around Plaster Patches: Feather Zones That Disappear

Introduction Picture-frame ridges are thin, raised borders that appear around plaster patches after finishing. They happen when the patch edge isn’t feathered smoothly into the surrounding wall. Fixing them means blending that border so it disappears under a flat surface. Start by lightly feathering the patch edges with multiple thin coats, keeping the transitions soft.

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Hand applying plaster on wall mesh with trowel

Plaster Over Radiant Heat Walls: Mesh, Isolation, and Thermal Cycling Reality

Introduction Plaster over radiant heat walls is coating heated walls with plaster after adding mesh and a small isolation layer. It relies on a reinforced base and a separating layer to handle heat and movement. In practice, expect this to be a hands-on job that needs careful prep and patience. The work breaks down into

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Man holding plastering hawk with fresh plaster

Sagging Plaster Ceilings: When Washers Help—and When Strapping Is Smarter

Introduction Sagging plaster ceilings can be stabilized temporarily by using washers under fasteners to pull the plaster back up. This is a short-term fix that can buy time while you plan a more permanent repair. Make sure you’re hitting solid framing, not just flaky plaster. Strapping is usually the smarter long-term approach when the ceiling

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Worker on stilts applying plaster to ceiling near scaffolding

Plaster Ceiling Cracks Along Joists: Why They Return and How to Bridge Them

Introduction Cracks along ceiling plaster near joists happen when the ceiling system moves and the plaster loses grip. They often reopen because framing shifts or settling continues after repair. This is DIY-friendly but you must inspect joist movement and check for underlying causes. Bridge them by stabilizing the joint area and smoothing a patch over

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Worker applying plaster to interior wall using trowel and hawk

Plaster Repairs Around HVAC Registers: Heat, Vibration, and Sharp Edges

Introduction Plaster repairs around HVAC registers are patches that seal gaps and restore a smooth surface where the duct opening meets the wall. These repairs must account for heat, vibration, and sharp edges created by the register. Keep it simple: assess the damage, choose appropriate patch materials, and plan a clean joint with the surrounding

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