Plastering is an essential part of every construction project be it a new build or a renovation. While a high-quality plastering job creates a smooth, durable surface, over time various challenges can arise. Professional plastering services specializing in smooth wall finishes, ceiling repairs, and decorative plasterwork for homes and commercial buildings guaranteeing quality, durability, and on-time project completion. Here we also help you understand common issues and how to fix them before they require costly repairs.

In this article, we discuss several common plastering problems and provide step-by-step advice on how to fix them. We also highlight important prevention tips that ensure longevity and durability in every project.

🔧 1. Cracks in Plaster

Problem Overview:

Cracks are one of the most frequently encountered plastering issues and can result from:

Poor workmanship: Incorrect application techniques or inadequate surface preparation.

Improper mixing ratios: Too much water can weaken the plaster.

Structural movement: Shifts in the foundation or settling of the building.

Rapid drying: Fast evaporation may cause the plaster to shrink and crack.

Types of Cracks:

Hairline Cracks: Thin, shallow lines that may appear due to drying.

Settlement Cracks: Caused by the natural settling of structures.

Structural Cracks: Deeper, often widening cracks that may indicate serious issues.

How to Fix:

For Hairline Cracks:

Use a fine surface filler.

Sand smoothly and repaint.

For Deeper Cracks:

Cut the crack into a “V” shape to remove loose material.

Clean the cavity thoroughly.

Fill with a polymer-modified filler for added strength.

Sand and repaint once dried.

For Structural Cracks:

Seek a professional assessment to determine the need for reinforcements or wall stabilization.

🌫 2. Blistering or Bubbling Plaster

Problem Overview:

Blistering and bubbling occur when plaster fails to adhere correctly. This defect is typically due to:

Moisture infiltration: Water may seep into the plaster, causing it to lift.

Dust accumulation: Insufficient cleaning of the substrate hampers adhesion.

Trapped air: Improper application techniques can trap air beneath the surface.

How to Fix:

Scrape Off Affected Areas: Remove blisters and loose plaster.

Thorough Cleaning: Make sure the substrate is free of dust and debris.

Reapply Plaster: Use a suitable bonding agent to help the new layer adhere properly.

Prevention Tip: Use high-quality materials and ensure proper mixing and application methods to avoid air bubbles.

Related: Basics of Plastering: All That You Ought to Know

💧 3. Damp Patches on Plaster Walls

Problem Overview:

Dampness can compromise plaster integrity, leaving surfaces soft, discolored, or even causing flaking. Common causes include:

Water ingress: Leaks from pipes, roofs, or poor window seals.

Poor ventilation: High humidity can lead to condensation and damp patches.

Faulty damp-proof membranes: Inadequate moisture barriers can allow water penetration.

How to Fix:

Identify the Source: Inspect for leaks or structural issues and repair them immediately.

Drying Process: Allow affected areas to dry completely. Use dehumidifiers if necessary.

Repair: Once dry, sand the area, apply a damp-proofing primer, and then use moisture-resistant plaster products.

Prevention Tip: Regularly inspect plumbing and roofing systems; ensure the installation of proper damp-proof membranes in vulnerable areas.

Related: How Gypsum Ceilings Improve Sound Quality in Any Space

❌ 4. Peeling or Flaking Plaster

Problem Overview:

Peeling or flaking occurs primarily due to:

Poor surface preparation: Lack of proper cleaning or priming before plastering.

Moisture issues: Exposure to excessive moisture or water damage.

Inappropriate materials: Using low-quality plaster or incorrect mixing ratios.

How to Fix:

Remove Loose Plaster: Scrape off all peeling areas.

Surface Preparation: Clean and apply a stabilizing primer to the substrate.

Reapply Plaster: Use a high-quality mix and ensure proper curing and drying.

Prevention Tip: Always prepare the surface thoroughly and choose materials that are suited for the environmental conditions of your project.

Related: Why Plastering is Essential for Building Maintenance

⚖ 5. Uneven or Wavy Plaster Surfaces

Problem Overview:

An uneven surface is typically a sign of:

Inexperienced application: Lack of expertise in spreading and smoothing the plaster.

Improper leveling: Using substandard tools or incorrect application techniques.

Inconsistent mixing: Variations in consistency can result in an uneven finish.

How to Fix:

Minor Imperfections: Sand down small inconsistencies gently.

Large Areas: Apply a skim coat using a proper leveling guide or tool for a smooth finish.

Expert Touch: Employ experienced plasterers for substantial projects to ensure consistency.

Prevention Tip: Ensure all tools are calibrated and mixed materials are uniform to avoid waviness.

Related: How Plastering Can Add a Touch of Elegance to Your Interiors

🔩 6. Plaster Falling Off

Problem Overview:

Plaster detachment can occur when:

Bonding is Poor: Inadequate priming or surface bonding agents are used.

Long-Term Moisture Exposure: Persistent damp conditions weaken the bond.

Aging Materials: Over time, even high-quality plaster can degrade if not maintained.

How to Fix:

Remove Loose Sections: Carefully scrape away all falling plaster.

Enhance Bonding: Use a bonding agent or create a plaster key by roughening the surface.

Reapply Plaster: Apply a fresh layer using professional techniques and allow ample drying time.

Prevention Tip: Regular maintenance and addressing moisture issues early can help prevent large-scale detachment.

🛡 Pro Tips to Prevent Plastering Problems

Thorough Surface Preparation:

Always clean surfaces and remove old, flaking materials. Prime surfaces to enhance adhesion.

High-Quality Materials:

Invest in certified, quality plaster and additives to ensure consistency and durability.

Control Environmental Factors:

Manage humidity and temperature during the drying phase to ensure proper curing.

Professional Application:

Consider hiring experienced plasterers such as those at TRG Technical Service for precision and reliability.

Regular Inspection and Maintenance:

Schedule periodic checks to catch early signs of trouble and address them promptly.

🏗 Why Choose TRG Technical Service?

At TRG Technical Service, we combine expert craftsmanship with industry-leading technology to provide:

• Top-notch plastering services for residential and commercial properties.
• Innovative solutions that address and prevent common plastering issues.
• Competitive pricing and prompt project completion.
• A professional team dedicated to quality and longevity in every project.

✅ Get in Touch

Facing plastering issues or planning a renovation? Don’t let plaster problems disrupt your project. Contact TRG Technical Service today for reliable, affordable, and professional plastering solutions that ensure a lasting finish.