Roughcasting

Roughcasting Glasgow

With our commitment to using only premium materials and applying a meticulous approach, we provide seamless Roughcasting services that deliver exceptional weather resistance, insulation and longevity. Our Roughcasting solution not only adds a visually attractive texture to your home but also functions as a safeguard against environmental elements such as rain, wind, and more.

We recognize that every home is unique, which is why we provide a variety of colors and finishes that cater to your personal preferences and blend perfectly with your home’s architecture. Our Roughcasting services are customized to your particular needs, whether you’re looking to update your home’s exterior or improve its durability.

At ERS Scotland, customer satisfaction is our top priority, and we take pride in offering Roughcasting solutions that enhance your home’s appearance and provide long-lasting protection. Count on us for dependable and professional Roughcasting services that enhance both the aesthetics and durability of your property.

The Roughcasting Process

Stage Three: Building the Base

In roughcasting, the base layer, mesh, and 50mm pins play important roles in ensuring the strength, adhesion, and durability of the roughcast. Here's a breakdown of their functions:

Base Layer: The base layer is the initial layer applied directly onto the surface of the wall. It serves as a bonding agent between the wall and the roughcast. The base layer is typically a mixture of cement, sand, and additives that provide good adhesion and a solid foundation for the roughcast. It helps to create a strong bond with the substrate, ensuring that the roughcast adheres firmly to the wall surface.

Mesh: The mesh is a reinforcing material embedded within the base layer. It is typically made of fiberglass or metal and is applied across the surface of the base layer while it is still wet. The mesh adds tensile strength to the roughcast, helping to prevent cracking and delamination. It also improves the overall structural integrity of the coating, making it more resistant to impact and external forces.

50mm Pins: 50mm pins, also known as fixing pins or nails, are used to secure the mesh to the base layer and the underlying wall. These pins are driven through the mesh and into the wall substrate at regular intervals. The 50mm length ensures that the pins penetrate deep enough into the wall to provide a secure anchor for the mesh. The pins help to prevent the mesh from shifting or separating from the base layer during application and drying, ensuring that it remains firmly in place.

We also apply system beads at this stage. The system bead, typically made of PVC or metal, is then positioned along the edges and corners of the wall. It is important to ensure that the system bead is aligned straight and flush with the wall surface. This also allows the flexibility for the roughcasting to move without cracking and splitting.

Stage Two: Hammer Test & Removal of Blown Areas

The hammer test is a well-known method for evaluating the quality and durability of roughcasting. It aims to ascertain the solidity and coherence of the material by lightly tapping the surface with a hammer. A seasoned technician performs the test by assessing different areas of the roughcast surface for a consistent, firm sound. If the hammer test produces an inconsistent or hollow sound, it could suggest areas of poor adhesion or delamination within the roughcast. In order to ensure that your roughcast is in good condition before re-rendering, it is essential that we perform this test. We diligently remove all blown areas of rendering, which we bring down to the brickwork level. This allows us to start building the new base layer for the re-rendering process.

Stage Four: Top Coat and Stone Coat Application

The application of a polymer-modified top coat and stone chip layer adds an extra layer of protection to the roughcast coating, making it more resistant to impact, weathering, and UV damage. The stone chips also contribute to the aesthetic appeal of the roughcast finish, providing a unique and textured appearance. Proper application techniques and quality materials are essential to achieve a durable and visually appealing result.

Polymer-Modified Top Coat: The polymer-modified top coat is a specialized mixture that combines cement, polymers, aggregates, and additives. This top coat provides enhanced flexibility, durability, and resistance to cracking compared to traditional cement-based coatings.

Stone Chip Application: Once the polymer-modified top coat is applied and smoothed, stone chips or aggregates are broadcasted onto the surface. These stone chips can vary in size and color, adding texture and visual interest to the finished roughcast coating.