Trying to fix your own plaster might seem simple. Watch a few videos. Buy some gear. But in our experience, most DIY jobs end up needing professional repair. Heritage Plastering often is called in after a DIY fix has gone wrong. The truth is, plaster repair is more technical than it looks—especially in older homes. Here are the top 5 DIY plaster repair mistakes people make—and why it’s best to call the pros.
Top 5 DIY Plaster Repair Mistakes: Using the Wrong Plaster
Not all plaster is the same. Gypsum, lime, cement—all behave differently.
Many older homes in Cheltenham and the Cotswolds need lime plaster. It’s breathable. It works with traditional materials. But DIYers often grab modern gypsum mixes instead.
This leads to cracking, damp issues, and damage to historic walls. Matching materials is key. If you’re unsure, get help. Learn more about our lime plastering services.
Skipping Surface Prep
Slapping plaster on without prepping the surface is a classic mistake. Dust, loose paint, or old plaster residue stops new material from bonding.
The result? It falls off in weeks. We prepare every wall properly. That’s what makes a repair last—not just look good.
Poor Mixing Technique
Plaster has to be mixed just right. Too thick? It cracks. Too wet? It won’t stick. And lime plaster? It needs breathing time—something most people don’t know.
DIY jobs often fail because of poor mix quality. Consistency matters. So does experience.
Overworking the Surface
Many DIYers keep troweling long after they should stop. This ruins the finish and causes uneven drying. You end up with trowel marks, streaks, and blistering.
Professional plasterers know when to stop. Timing is part of the craft. It’s what gives a wall that smooth, lasting finish.
Ignoring the Bigger Problem
A crack might seem small. But what caused it?
DIY fixes cover symptoms, not causes. We investigate the full issue. Was it damp? Movement? Bad materials?
We fix the root—not just the crack.
Why Hire a Plastering Professional? To avoid these Top 5 DIY Plaster Repair Mistakes
DIY can cost more in the long run. If the job fails, you’ll need it redone. That means time, money, and more disruption.
We’ve repaired homes across Cheltenham, Gloucestershire, and the Cotswolds. Whether it’s lime plaster restoration or modern plastering, we do it right the first time. Don’t risk your walls. Let us handle it. Contact us now for a professional plastering solution you can trust.