The Purpose and Techniques of Keeping External Wall Plaster Rough

Ensuring the rough texture of external wall plaster is not just a design choice but also a functional necessity. This article explores the multiple benefits of rough plaster, including improved adhesion, aesthetic appeal, water drainage, thermal performance, reduced slipperiness, and enhanced durability. We will also delve into the various techniques and steps involved in applying external plaster to achieve the desired rough texture.

The Importance of Rough Plaster Texture

The use of rough plaster on external walls has multiple advantages. Not only does it serve a range of practical functions, but it also contributes significantly to the aesthetic appeal of a building. Here is an overview of the key purposes and benefits:

Improved Adhesion: A rough surface enhances the adhesion of paints, coatings, or additional layers of plaster. This prevents peeling or flaking over time. Aesthetic Appeal: Rough textures can provide a rustic or natural appearance, desirable for certain architectural styles, and can hide imperfections in the underlying wall structure. Water Drainage: Rough surfaces help in better drainage of rainwater, reducing the risk of water pooling and subsequent damage or mold growth. Thermal Performance: A rough texture creates air pockets that enhance insulation properties and help regulate the temperature inside the building. Reduction of Slipperiness: Rough plaster can prevent slipping, especially in areas exposed to rain or moisture. Enhanced Durability: Rough surfaces are less prone to damage from impacts or environmental wear compared to smooth surfaces.

Different Approaches to External Wall Plastering

There are many ways to render and plaster the exterior walls of a structure, each with its unique benefits. Common techniques include:

Wet Dash: Adds texture by using a mix of plaster and sand. Smooth: Provides a polished and clean finish. Abrasive Trowel: Creates a rough texture using an abrasive trowel. Dry Dash White Stone: Similar to wet dash but uses dry materials to create a textured finish.

While some people prefer a smooth finish, others appreciate the rustic look of a rough plaster texture. The choice ultimately depends on the desired aesthetic and practical considerations.

Plastering an External Wall: A Step-by-Step Guide

To achieve a rough plaster texture, the process is meticulous and requires careful preparation. Here’s a step-by-step guide to ensure a successful application:

Preparation: Before starting, ensure all craftsmanship work is completed. Prepare a platform where the plaster will be applied and fill any gaps or joints in the wall. Cleanliness: Remove all unwanted materials such as wooden pieces, paper, and ropes from the R.C.C. and craftsmanship surfaces. Hydration: Wet the surfaces a day before plastering to ensure proper hydration. Surface Inspection: Check the level of railing walls, windows, doors, and other features. Correct any imperfections before plastering. Marking Levels: Imprint level spots before starting the external plastering process. Clean any green growth or blossoming on R.C.C. surfaces with a wire brush. Marking Lines: Set line Doris for all sides of the walls, corners of windows, and other areas as needed. Plaster Application: Use a plaster machine or trowel to apply the rough plaster. Start the process two days in advance to allow the plaster to gain sufficient strength. Joint Preparation: Clean all joints and surfaces with a wire brush and ensure they are free of oils and other contaminants. Chicken Lattice Application: Add chicken lattice to all joints and R.C.C. walls. Use plumbing nails on the R.C.C. side and wire nails on the craftsmanship side. Ensure the chicken lattice is tight and properly secured. Stake Fixation: Fix level stakes on external wall surfaces using a leveling instrument or focus plumb sways. First Coat: Apply the first coat of mortar (1:4 Cement and Sand up to 12 mm) where required. Post-Plastering Maintenance: Allow the plaster to dry and finish the evening out of walls as needed.

By following these detailed steps, contractors can achieve a rough and robust external wall plaster finish that enhances both the beauty and functionality of any building.