What Not to Do When Plastering

Plastering is a skill that requires precision, patience, and proper technique. Making mistakes can lead to uneven surfaces, cracking, or weak adhesion. Whether you’re a DIY enthusiast or considering professional plastering, it’s important to know the common pitfalls to avoid. In this blog, we’ll cover what not to do when plastering to ensure a smooth, durable finish.

1. Not Preparing the Surface Properly

✅ Do This Instead: Always clean the surface, remove dust, and apply PVA or SBR as needed to ensure proper adhesion. ❌ Don’t Apply Plaster to Dirty or Dusty Walls – The plaster won’t bond properly, leading to flaking and poor durability.

2. Skipping PVA or SBR Primer

✅ Do This Instead: Always apply a primer like PVA or SBR before plastering, especially on porous surfaces. ❌ Don’t Plaster Directly onto Bare Brick or Dry Plasterboard – It will dry too fast, making it difficult to achieve a smooth finish.

3. Mixing Plaster Incorrectly

✅ Do This Instead: Follow manufacturer guidelines and use clean, cold water when mixing. Add plaster to water, not the other way around. ❌ Don’t Use Too Much or Too Little Water – Incorrect ratios lead to poor consistency, cracking, or weak plaster.

4. Applying Plaster Too Thick or Too Thin

✅ Do This Instead: Apply a base coat (if needed), then a skim coat at 2-3mm thickness for a perfect finish. ❌ Don’t Apply Plaster in One Thick Layer – It will take too long to dry and could crack.

5. Not Timing the Troweling Stages Properly

✅ Do This Instead: First pass: Flatten the plaster while still wet. Second pass: Refine it before it starts to set. Final pass: Polish for a smooth finish. ❌ Don’t Leave Plaster Too Long Before Troweling – It will set, making it impossible to smooth out properly.

6. Overworking the Plaster

✅ Do This Instead: Work efficiently and apply the right amount of pressure with the trowel. ❌ Don’t Keep Reworking Drying Plaster – This can cause drag marks, streaks, and an uneven surface.

7. Rushing the Drying Process

✅ Do This Instead: Let plaster dry naturally at room temperature with proper ventilation. ❌ Don’t Use Heaters or Fans to Speed Up Drying – Rapid drying can cause cracks and weak plaster.

8. Painting Too Soon After Plastering

✅ Do This Instead: Wait until the plaster fully dries (usually 5-7 days, sometimes longer) before painting. ❌ Don’t Apply Paint Too Early – It will trap moisture, leading to peeling and poor adhesion.

9. Not Cleaning Tools and Equipment

✅ Do This Instead: Wash tools immediately after use to prevent hardened plaster buildup. ❌ Don’t Use Dirty Tools – Old, dried plaster can cause lumps and uneven application.

10. Attempting Complex Plastering Without Experience

✅ Do This Instead: Hire a professional for large or detailed plastering jobs. ❌ Don’t Try to Learn on an Important Wall – If unsure, practice on a small area first.

Hire a Professional Plasterer for a Perfect Finish

Avoid these common mistakes by hiring Cooper Plastering—your local experts in Stratford Upon Avon and Warwickshire. We provide high-quality, professional plastering services with a flawless finish every time.

📍 Location: Stratford Upon Avon, Warwickshire
📞 Phone: 07802493234
🌐 Website: www.cooperplastering.co.uk

For expert plastering that lasts, trust Cooper Plastering—the leading name in Warwickshire!