A paint job is judged by its final look, but its quality is decided before the first roller stroke. Surface preparation often accounts for 70% of the time on a serious project. It's what separates amateur work from a finish that lasts.
Why is preparation so important?
Beautiful paint applied to a poorly prepared wall will peel, blister or let flaws show through within months. Paint doesn't fix a surface — it reveals it. A well-prepared wall, on the other hand, guarantees perfect adhesion and a flawless finish that lasts for years.
The stages of careful preparation
- Cleaning: dusting, degreasing, removing mould.
- Repair: filling holes and cracks, treating damaged areas.
- Sanding: for a perfectly smooth surface and good adhesion.
- Fine sanding and a final dust removal.
- Primer: essential on new plaster or porous surfaces; it evens out absorption and seals the background.
The most common mistakes
- Painting over a damp or dirty wall.
- Skipping the primer to save time.
- Failing to protect floors, furniture and woodwork.
- Applying the second coat before the first is fully dry.
Should you do it all yourself?
For a small touch-up, yes. For a whole room or a renovation, the time and equipment needed for proper preparation often tip the balance towards a professional — who guarantees the result.
Have a project in mind?
Casa Renova works throughout the Coimbra and Aveiro region. Free quote and personalised advice.
Request a free quote