1. Unit 1003 Building methods and construction technology © Pearson Education 2010 Printing and photocopying permitted Learning Outcome 2 Know about the construction of internal and external masonry

2. Unit 1003 Building methods and construction technology © Pearson Education 2010 Printing and photocopying permitted Bonding ●Bonding is the different patterns formed when lapping bricks. ●Half brick lap is the most common type of bond. ●Bonding gives more strength to a wall and also distributes heavy loads. What problems might you have with walls without bonding?

3. Unit 1003 Building methods and construction technology © Pearson Education 2010 Printing and photocopying permitted Cavity walls ●The most common type of wall is cavity walling. ●Two walls built parallel to each other with a gap in between. ●The outer leaf prevents rain and wind penetrating. ●The cavity is usually filled with insulation.

4. Unit 1003 Building methods and construction technology © Pearson Education 2010 Printing and photocopying permitted Internal walls ●Blockwork – covered with plasterboard. Low thermal and sound insulation. ●Metal stud partition – similar to timber but using metal. ●Timber stud partition – quick to erect. Clad in plasterboard and insulation can be used. When might these walls be used?

5. Unit 1003 Building methods and construction technology © Pearson Education 2010 Printing and photocopying permitted Wall ties and lintels ●Wall ties – these tie the internal and external walls together, giving stability. ●Lintels – bridge any openings in walls and support brickwork above.

6. Unit 1003 Building methods and construction technology © Pearson Education 2010 Printing and photocopying permitted Mortar ●Mortar is used in bricklaying for bedding and jointing the bricks when building a wall. ●What materials are used to produce mortar? ●Mortar materials are kept dry before adding water. Why? ●What are the advantages of mixing by machine?

7. Unit 1003 Building methods and construction technology © Pearson Education 2010 Printing and photocopying permitted Mixing mortar Mixing process ●Use an electric or petrol/diesel mixer on level ground. ●Gauge the materials and fill the mixer with half the water required. ●Add half the amount of cement and sand. ●Allow to mix and then add remaining cement and sand. ●Add more water and allow two minutes to mix. How would you mix mortar by hand?