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An insulated suspended timber ground floor abuts the external wall of a dwelling house, as shown in the accompanying sketch - Leaving Cert Construction Studies - Question 1 - 2009
Question 1
An insulated suspended timber ground floor abuts the external wall of a dwelling house, as shown in the accompanying sketch. The external wall is a 350 mm concrete ... show full transcript
Worked Solution & Example Answer:An insulated suspended timber ground floor abuts the external wall of a dwelling house, as shown in the accompanying sketch - Leaving Cert Construction Studies - Question 1 - 2009
Step 1
Draw a vertical section through the external wall and the suspended timber ground floor.
Answer
- Start by sketching the outline of the external wall, indicating the 350 mm concrete block wall and the 150 mm cavity between it.
- Inside the cavity, draw and label the rigid insulation board that fits within the cavity.
- Draw the suspended timber floor above the foundation, ensuring to represent the 25 mm tongued and grooved hardwood finish.
- Show the foundation, ensuring that it extends below the finished floor level.
- Include critical dimensions, ensuring to mark at least four typical dimensions, such as the thickness of the concrete block wall, the cavity width, the insulation thickness, and the height of the suspended timber floor from the foundation to 400 mm above the finished floor level.
Step 2
Indicate clearly the position of a barrier that would prevent radon gas entering the dwelling.
Answer
- On your drawing, indicate the position of a radon barrier below the finished floor level.
- The barrier should be drawn as a continuous layer of material, such as a plastic sheet, that extends across the area of the foundation and under the suspended timber floor.
- Clearly label this barrier as 'Radon Barrier' to avoid confusion.