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The external wall of a dwelling house is a 400 mm concrete block wall with a full-fill insulated cavity - Leaving Cert Construction Studies - Question 1 - 2019
Question 1
The external wall of a dwelling house is a 400 mm concrete block wall with a full-fill insulated cavity. The wall is plastered on both sides. A triple glazed timber ... show full transcript
Worked Solution & Example Answer:The external wall of a dwelling house is a 400 mm concrete block wall with a full-fill insulated cavity - Leaving Cert Construction Studies - Question 1 - 2019
Step 1
Draw a vertical section through the top portion of the window.
Answer
- Scale and layout: Begin drawing to a scale of 1:5. Outline the vertical section of the wall, ensuring to include the 400 mm thickness of the concrete block wall and the 150 mm x 80 mm window frame.
- Concrete Lintels: Illustrate the prestressed concrete lintels, measuring 100 mm x 70 mm. Position them above the window frame, ensuring they rest securely.
- Insulation and layers: Show the full-fill insulated cavity between the two concrete block layers. Indicate the outer 100 mm concrete block leaves and the inner 100 mm block leaves.
- Finishing Details: Include 19 mm external render on the outer side and 15 mm internal plaster on the inside.
- Dimensions: Label four typical dimensions on the drawing, including the thicknesses of various layers and positions of the elements, ensuring clarity in representation.
Step 2
Show clearly on your drawing the typical design detailing to ensure that the cavity is closed at the window head.
Answer
- Fire Stop Cavity Closer: Draw a proprietary fire stop cavity closer positioned in the cavity above the window head. This is crucial for maintaining compliance with building regulations.
- Fixing Plasterboard: Illustrate how the plasterboard is fixed to the inside reveal above the window, ensuring a continuous finish and aesthetic appearance.
- Functional Elements: Ensure that your drawing highlights the way these components work together to effectively 'close' the cavity and prevent moisture ingress or air leakage.