Photo AI
Thermal insulation is important in the construction of a dwelling house - Leaving Cert Construction Studies - Question 8 - 2007
Question 8
Thermal insulation is important in the construction of a dwelling house. (a) Using notes and neat freehand sketches, show the position of the thermal insulation qui... show full transcript
Worked Solution & Example Answer:Thermal insulation is important in the construction of a dwelling house - Leaving Cert Construction Studies - Question 8 - 2007
Step 1
Using notes and neat freehand sketches, show the position of the thermal insulation quilt in the attic of a new house.
Answer
The thermal insulation quilt is positioned between the joists above the plasterboard.
- Placement: The insulation quilt is laid between the joists, providing a barrier against heat loss.
- Layering: A further layer of insulation is placed above the ceiling to enhance thermal efficiency.
- Total Thickness: Ensure that the total amount of insulation does not exceed 250 mm, maintaining a minimum U-value of 0.16W/m² °C.
- Continuity: If attic development is carried out, ensure that the thermal insulation is continued up the sides of the roof.
Step 2
On your sketch, show clearly the position of a vapour barrier and give one reason why it should be placed in the position outlined.
Answer
-
Position of the Vapour Barrier: The vapour barrier is fitted on the warm side of the insulation, usually on the underside of the plasterboard.
-
Material Used: It typically consists of a thin, polyethene layer that prevents moisture migration into the insulation.
-
Reason for Placement: This placement is crucial as it prevents condensation within the insulation, which could lead to water damage and reduced effectiveness of the insulation.
Step 3
Outline two safety precautions that should be observed when placing an insulation quilt in an attic.
Answer
-
Personal Protective Equipment: Wear gloves and long sleeves to protect your skin from irritants and sharp materials.
-
Safe Working Practices: Do not stand directly on the ceiling surface below the joists; instead, stand on a wide board spanning over the joists to distribute weight and ensure stability.