Plastering plays a crucial role in transforming bare brick or block walls into smooth, attractive surfaces ready for painting or decorating. Whether you’re renovating an old home or finishing a new build, understanding the internal plastering process helps ensure a flawless result. In this article, we’ll explore the step-by-step method used in internal plastering Bristol and why choosing the right professionals makes a difference.
At Plasterer Bristol, we offer both internal and external plastering services tailored to your property’s needs. This guide walks you through the internal plastering process and explains what to expect at each stage.
Why Internal Plastering Matters
Internal plastering is more than just aesthetics. A professionally plastered wall adds durability, improves insulation, and increases a building’s overall value. It provides a smooth, clean surface that enhances interior design and protects walls from wear and tear.
For property owners looking for internal plastering Bristol, hiring skilled tradespeople is key to ensuring high standards and lasting results.
Preparation Before Internal Plastering
The first and arguably most important step in internal plastering is preparation. Without a well-prepared surface, plaster will fail to adhere properly and may crack or peel over time.
1. Clearing the Area
Before plastering begins, all furniture and floor coverings are removed to protect them from dust and debris. Professional plasterers will use dust sheets and protective coverings if any fixtures remain.
2. Surface Inspection and Cleaning
Walls are thoroughly inspected for defects like loose bricks, dust, or grease. Any existing paint, wallpaper, or old plaster that’s peeling must be stripped away. A clean surface ensures better bonding for the new plaster.
3. Fixing Cracks and Holes
Cracks or holes in walls are filled using appropriate filler material. Loose masonry or uneven areas are repaired to create a stable base.
4. Applying Bonding Agent or PVA Solution
A bonding agent or a mix of PVA (Polyvinyl Acetate) and water is applied to the walls. This seals porous surfaces and improves plaster adhesion. It also prevents the wall from drawing moisture out of the plaster too quickly.
Step-by-Step Process of Internal Plastering
Once preparation is complete, the actual plastering work can begin. This process involves several layers and techniques to achieve a smooth, even finish.
1. First Coat (Scratch Coat)
The scratch coat is the first layer of plaster applied to the wall. It’s typically a mix of cement, sand, and water, although gypsum-based products are also used. The plaster is spread evenly using a plastering trowel.
After the application, the surface is “scratched” lightly with a plastering comb or notched trowel to create ridges. These ridges help the second coat adhere properly.
2. Second Coat (Brown Coat or Float Coat)
Once the scratch coat has partially set, a second layer—known as the brown coat or float coat—is applied. This coat levels out the surface, filling in any dips or irregularities. It’s worked smooth with a float and often leveled using a straight edge.
The goal here is to create an even surface that requires minimal correction before the final coat.
3. Final Coat (Finishing Coat or Skim Coat)
The finishing coat, also called the skim coat, is the last and thinnest layer applied. It’s typically a fine plaster, like multi-finish plaster, which gives a smooth, flawless surface ready for painting or wallpapering.
This coat is applied thinly—usually around 2mm thick—and smoothed with a trowel in multiple passes. A skilled plasterer will keep working the plaster as it sets to achieve a polished, blemish-free finish.
Drying and Curing
After plastering is complete, the walls need time to dry and cure before any decorating can take place. Depending on factors like temperature and humidity, this can take between 5 to 7 days.
During this time:
- Avoid applying heat directly to the plaster (like with a heater), as this can cause cracking.
- Allow natural ventilation for even drying.
- Don’t paint or wallpaper until the plaster is completely dry.
You’ll know the plaster is dry when it changes from a dark brown or greyish color to a light pink or pale beige.
Sanding and Preparing for Decoration
Once dry, the plaster is lightly sanded with fine-grit sandpaper to remove any minor imperfections. The surface is now ready for primer and paint or wallpaper.
Common Tools Used in Internal Plastering
Professional plasterers rely on a variety of tools to complete the job effectively:
- Plastering Trowel – for applying and smoothing plaster
- Plasterer’s Float – for leveling the surface
- Straight Edge or Darby – for checking flatness
- Mixing Buckets – for preparing plaster mixes
- Hawk Board – to hold plaster while working
- Plastering Comb – for scratching the base coat
- Sandpaper – for final smoothing before decoration
External Plastering: How It Differs
While internal plastering focuses on creating smooth surfaces for interiors, external plastering Bristol deals with protecting buildings from external elements like rain and wind. External plastering usually involves stronger materials, such as sand and cement mixes, and sometimes incorporates waterproofing agents.
The process is similar but requires additional measures to ensure weather resistance and durability. External plaster can also include decorative finishes, like pebbledash or textured coatings, to improve curb appeal.
Why Hire a Professional Plasterer?
Plastering is a skilled trade that requires precision, timing, and an eye for detail. Poorly done plaster can crack, sag, or look uneven, causing costly repairs down the line.
At Plasterer Bristol, we provide professional plastering services for both interiors and exteriors. Whether you need smooth walls for your living room or durable rendering for your home’s façade, we deliver quality craftsmanship and lasting results.
Tips for Maintaining Plastered Walls
Once your walls have been plastered and painted, proper maintenance helps prolong their life:
- Avoid Dampness: Ensure good ventilation to prevent moisture build-up.
- Handle Cracks Early: Address any hairline cracks immediately to stop them from worsening.
- Repaint Periodically: Refresh paint every few years to maintain the look and protect the plaster.
Conclusion
Internal plastering is a vital part of finishing any building project, providing smooth, durable surfaces that are ready for decoration. The process involves careful preparation, multiple plaster layers, and precise finishing techniques to create walls that are both functional and attractive.
Whether you’re seeking internal plastering Bristol services for a home renovation or new construction, understanding the process helps you make informed decisions. For those also considering external plastering Bristol, professionals like Plasterer Bristol offer the expertise needed to complete both interior and exterior plastering to a high standard.
