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A dwelling house has an insulated solid concrete ground floor which abuts a 350 mm concrete block external wall with an insulated cavity, as shown in the sketch - Leaving Cert Construction Studies - Question 7 - 2013
Question 7
A dwelling house has an insulated solid concrete ground floor which abuts a 350 mm concrete block external wall with an insulated cavity, as shown in the sketch. The... show full transcript
Worked Solution & Example Answer:A dwelling house has an insulated solid concrete ground floor which abuts a 350 mm concrete block external wall with an insulated cavity, as shown in the sketch - Leaving Cert Construction Studies - Question 7 - 2013
Step 1
Show, using notes and neat freehand sketches, the typical design detailing at the junction of the floor and wall. Label the floor components and include three typical dimensions.
Answer
To illustrate the junction of the floor and wall, create a detailed sketch showing the following components:
- Concrete Slab: Dimensions should be marked (e.g., 100-150 mm thick).
- Floor Screed: Indicate the sand/cement fine screed finish (25-50 mm).
- Damp Proof Membrane: Detail the damp proof membrane that acts as a barrier to moisture meaningfully positioned above the insulation.
- Vertical Perimeter Insulation: Depict insulation with a minimum of 50 mm thickness surrounding the edge of the floor, labeling it accordingly.
- Concrete Block Wall: The 350 mm concrete block external wall should be clearly marked, along with the cavity insulation.
- Provide three typical dimensions as follows:
- Concrete slab thickness: 100-150 mm
- Floor screed: 25-50 mm
- Minimum vertical perimeter insulation: 50 mm
Be sure to label each component as you draw the junction.
Step 2
Show clearly on your sketch the typical design detailing which will prevent the formation of a cold bridge at the junction of the floor and the wall.
Answer
In your sketch, add the following details to prevent cold bridging:
- Vertical Perimeter Insulation: Clearly show how vertical insulation is installed between the inner leaf of the wall and the concrete slab. This insulation can prevent cold air from reaching the internal structure.
- Thermal Breaks: Illustrate lightweight insulation blocks at the base of the wall, which help to carry on the thermal insulation from the floor to the wall.
- Insulation Overlap: Indicate the detail where the insulation overlaps (150 mm minimum, up to 225 mm) from the wall to the slab, ensuring there are no gaps that could facilitate heat loss.
Label the thermal break adequately to highlight how it maintains thermal integrity at the junction.
Step 3
Recommend a suitable floor covering for a bathroom on the ground floor of the house and give two reasons for your choice of floor covering.
Answer
A suitable floor covering for a bathroom would be Vinyl Flooring. Here are the two reasons for this choice:
- Water Resistance: Vinyl is highly resistant to moisture and water damage, making it an ideal choice for bathrooms where splashes and spills are common.
- Ease of Maintenance: Vinyl flooring is easy to clean and maintain, as it can withstand stains and scuffs, providing a hygienic environment essential for bathroom use.
Additionally, vinyl is available in various colors and designs, allowing for aesthetic flexibility.