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A young couple have bought an old, uninsulated house - Leaving Cert Construction Studies - Question 2 - 2019
Question 2
A young couple have bought an old, uninsulated house. They wish to improve the insulation properties of the house and have decided to start by insulating the attic s... show full transcript
Worked Solution & Example Answer:A young couple have bought an old, uninsulated house - Leaving Cert Construction Studies - Question 2 - 2019
Step 1
Draw a large freehand sketch of the triangular attic space.
Answer
For this sketch, depict the triangular shape of the attic space, illustrating the ceiling joists placed at 200 mm x 40 mm dimensions. Include the insulation quilt placed between the joists above the plasterboard, with a further layer beneath it to enhance thermal efficiency.
Insulation Type
- Fibreglass Insulation: Highly recommended due to its excellent thermal properties and cost-effectiveness.
Thickness of Insulation
- Minimum Thickness: The insulation should have a minimum thickness of 350 mm to ensure optimal thermal performance.
Step 2
Show one method of insulating the trapdoor.
Answer
To insulate the trapdoor, use a pre-insulated trapdoor. It should be fitted with layers of solid insulation that are attached to the upper face of the trapdoor to minimize heat loss.
Additional Method of Sealing the Trapdoor
- Fit weather stripping around the edge of the trapdoor to seal any gaps between the frame and the trap when closed, thus preventing air penetration.
Step 3
Discuss two reasons why the couple should begin by insulating the attic space.
Answer
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Greatest Heat Loss: Approximately 30% of heat can escape through the roof, making attic insulation critical for energy efficiency.
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Improving Building Energy Rating: Insulating the attic greatly improves the building's Energy Rating (BER), enhancing overall comfort and reducing heating costs.