Know how to Carry out Basic Blocklaying — Open Awards Vocationally-Related Qualification Construction & Building Services Revision
This subtopic introduces learners to the fundamental practices of basic blocklaying, focusing on preparation, setting out, and construction using dense con
Topic Synopsis
This subtopic introduces learners to the fundamental practices of basic blocklaying, focusing on preparation, setting out, and construction using dense concrete and lightweight insulation blocks. It covers essential health and safety, material selection, tool use, and the sequential process of building a straight and level block wall to given specifications. Mastering these skills is crucial for aspiring bricklayers and construction operatives in domestic and commercial building projects.
Key Concepts & Core Principles
- Health and safety regulations: Understanding the Health and Safety at Work Act 1974, COSHH, and PPE requirements to keep yourself and others safe on site.
- Basic tool identification and use: Knowing the names, purposes, and safe handling of common hand tools (e.g., trowels, hammers, saws) and power tools (e.g., drills, sanders).
- Material properties: Recognising different building materials like bricks, blocks, timber, and plasterboard, and understanding their basic characteristics and uses.
- Measuring and marking out: Accurately using tape measures, levels, and squares to mark out materials for cutting or assembly.
- Construction processes: Following step-by-step instructions to complete simple tasks like laying bricks, cutting timber, or applying paint.
Exam Tips & Revision Strategies
- Always refer to the manufacturer’s instructions for both block types, as methods for cutting, laying, and curing may differ significantly between dense concrete and lightweight insulation blocks.
- Take time to set up profiles and line carefully; accurate setting out is crucial to pass the practical assessment, and examiners will check alignment, gauge, and level at every stage.
- Use a gauge rod or storey pole to maintain consistent course heights, as this demonstrates professional practice and helps avoid dimensional errors that could lead to failed assessment criteria.
- Always refer to the job specifications and working drawings before setting out.
- Use a spirit level regularly and correct any deviations immediately before the mortar sets.
- Practice safe manual handling techniques when lifting heavy blocks to avoid injury.
- In theoretical questions, explain the purpose of each step, such as why damping blocks improves bond strength.
- Ensure all PPE is worn throughout the practical task to demonstrate compliance with health and safety requirements.
Common Misconceptions & Mistakes to Avoid
- Students often fail to check levels regularly during construction, leading to walls that are out of plumb or have uneven bed joints, which can cause structural instability.
- A common error is using an incorrect mortar mix – e.g., too strong for lightweight blocks or too weak for dense blocks – which affects bond strength and durability.
- Many learners neglect to incorporate a damp-proof course or forget to adjust mortar consistency when working with lightweight insulation blocks, leading to poor adhesion.
- Failing to dampen blocks before laying, leading to poor adhesion.
- Neglecting to check the level and plumb frequently, resulting in an uneven or leaning wall.
- Using mortar that is too dry or too wet, causing weak joints or slumping.
Examiner Marking Points
- Award credit for demonstrating the correct selection and inspection of tools and materials, including checking block sizes, mortar consistency, and ensuring all required personal protective equipment (PPE) is worn.
- Award credit for accurately setting out the work area, including establishing a level datum, erecting corner profiles, and running a line to control alignment, with evidence of using a spirit level and tape measure correctly.
- Award credit for building a straight, level, and plumb block wall using acceptable bonding patterns (e.g., half-bond stretcher bond) with dense concrete and lightweight insulation blocks, incorporating appropriate mortar joints of consistent thickness.
- Award credit for demonstrating safe handling techniques for different block types, such as using correct lifting methods for dense blocks and cutting lightweight blocks accurately without causing excessive waste or dust.
- Award credit for listing necessary personal protective equipment (PPE) and tools before commencing work.
- Award credit for demonstrating correct procedure for mixing mortar to a workable consistency appropriate for blocklaying.
- Award credit for accurately establishing a straight line and setting out corners using profiles and string lines.
- Award credit for laying blocks to a level and plumb line, maintaining even bed joints and perpends.