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The main door of a house is an insulated wooden door with 12 mm cedar sheeting on both sides, as shown - Leaving Cert Construction Studies - Question 1 - 2017
Question 1
The main door of a house is an insulated wooden door with 12 mm cedar sheeting on both sides, as shown. The door is fitted in a 400 mm concrete block external wall w... show full transcript
Worked Solution & Example Answer:The main door of a house is an insulated wooden door with 12 mm cedar sheeting on both sides, as shown - Leaving Cert Construction Studies - Question 1 - 2017
Step 1
To a scale of 1:5 draw a vertical section through the top of the door, showing the wall, the concrete lintels over the door, the doorframe and the door.
Answer
To answer this part, begin by setting the scale of the drawing to 1:5. Draw a vertical section through the door, ensuring to include:
- The external wall with a 19 mm external render.
- A 100 mm concrete block outer leaf with 200 mm full-fill cavity insulation.
- A 100 mm concrete block inner leaf and a 15 mm internal plaster with skim coat.
- Highlight the 90 mm door top rail and insulation, including the 150 mm × 70 mm thermally broken door frame.
- Represent the reinforced concrete lintels over the door with suitable labels.
- Finally, include three typical dimensions: the total height from the bottom of the door to the lintels, the width of the doorframe, and the depth of the wall including insulation.
Step 2
Show clearly on your drawing how to prevent the penetration of rainwater at the head of the door.
Answer
To indicate prevention of rainwater penetration at the head of the door, incorporate the following elements into your drawing:
- Insert a Damp Proof Course (DPC) between the inner and outer leaf to block moisture from rising.
- Ensure the DPC slopes towards the outside to facilitate drainage.
- Label these components clearly to denote their purpose in preventing water ingress.