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The drawing shows the elevation and plan of a semi-detached house with an adjoining storeroom - Leaving Cert Construction Studies - Question 3 - 2012
Question 3
The drawing shows the elevation and plan of a semi-detached house with an adjoining storeroom. All external walls are of single leaf 215 mm hollow block constructio... show full transcript
Worked Solution & Example Answer:The drawing shows the elevation and plan of a semi-detached house with an adjoining storeroom - Leaving Cert Construction Studies - Question 3 - 2012
Step 1
Redesign of ground floor layout to increase penetration of sunlight - minimum
Answer
To enhance the sunlight penetration into the dwelling, the following changes are proposed:
- Install high-performance glazing on southern elevation: This will maximize sunlight exposure throughout the day.
- Replace existing windows with high-performance units: These should preferably be low-double or triple-glazing to ensure thermal efficiency while allowing light in.
- Modify roof lights: The roof lights should be appropriately sized and situated to allow optimal light entry.
- Convert the storeroom: The storeroom doors should be replaced with glazed doors that maintain a connection between the interior and the existing dining space. This will further allow for better light distribution.
- Consider additional elements like a retractable partition: This can provide flexible light retention depending on the time of day.
Step 2
Upgrading the thermal properties of external walls
Answer
To improve the thermal performance of the external walls, the proposed strategies include:
- Reinforce external walls: As the original walls are hollowblock, the use of additional insulation is recommended. This can involve:
- Installing rigid insulation boards with appropriate fixings to prevent thermal bridging.
- Using 80mm to 300mm of insulation depending on the eaves overhang.
- Securing fiberglass mesh to ensure a stable insulation fix.
- Apply acrylic render: This should be applied in two coats to enhance thermal efficiency and protect the exterior.
- Optimize glazing: Use low-e soft coat triple glazing and fill windows with Argon or Krypton gas to reduce heat loss and improve performance.
- Improve window installation: Ensuring all window units are properly sealed to avoid air leakage and enhance thermal performance.
Step 3
Discussion of proposed design choices
Answer
The following points support the design choices made above:
- Increased sunlight and health benefits: Enhanced natural light can have significant positive impacts on occupants’ health and well-being, reducing reliance on artificial lighting and aiding in mood enhancement.
- Reduction of energy costs: Overall thermal upgrades can significantly lower heating costs in winter and cooling costs in summer, benefiting the homeowner financially.
- Minimized carbon footprint: By increasing energy efficiency and reducing energy consumption, these design choices have a positive effect on sustainability and reduce the overall carbon footprint of the building.
- Aesthetic appeal: Improved glazing and redesigned spaces allow for an open and inviting atmosphere, increasing the property's market value.