A four panel solid wooden door and doorframe are fixed in the external wall of a dwelling house, as shown in the accompanying sketch. The doorframe is 120 mm x 75 mm and the top rail of the door is 120 mm x 50 mm. The wall is a 300 mm concrete block wall with an insulated cavity and is plastered on both sides. (a) To a scale of 1:2 (half full size), draw a vertical section through the external wall, doorframe and door. Show all the construction details from the 250 mm below to 350 mm above the concrete lintel at the door head. (b) Include on your drawing a design detail to ensure that moisture does not penetrate to the inner leaf of the wall at the door head.

Leaving Cert Construction Studies Windows & Doors: A four panel solid wooden door a

A four panel solid wooden door and doorframe are fixed in the external wall of a dwelling house, as shown in the accompanying sketch - Leaving Cert Construction Studies - Question 4 - 2008

Question 4

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A four panel solid wooden door and doorframe are fixed in the external wall of a dwelling house, as shown in the accompanying sketch. The doorframe is 120 mm x 75 m... show full transcript

Worked Solution & Example Answer:A four panel solid wooden door and doorframe are fixed in the external wall of a dwelling house, as shown in the accompanying sketch - Leaving Cert Construction Studies - Question 4 - 2008

Step 1

To a scale of 1:2 (half full size), draw a vertical section through the external wall, doorframe and door.

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Answer

In this part of the answer, the drawing should include the following details:

19 mm External Render: Represent this layer at the exterior of the wall section.
Patent Reveal: Ensure this is clearly indicated around the doorframe.
Concrete Block Outer Leaf (100 mm): Illustrate this thickness as part of the wall structure.
Residual cavity (40 mm): Show the insulated cavity of the wall.
Concrete Block Inner Leaf (100 mm): Include this section of the wall as well.
Internal Plaster (15 mm): Add this finish detail inside the wall.
Insulation: Indicate insulation material to comply with current Building Regulations.
Doorframe (120 mm x 75 mm): Clearly detail the dimensions of the doorframe.
Top Rail of the Door (120 mm x 50 mm): Ensure this is represented correctly in the drawing.
Concrete Lintel: The structure should demonstrate where the concrete lintel sits above the door.

All elements should be proportionally drawn to the specified scale and labeled appropriately.

Step 2

Include on your drawing a design detail to ensure that moisture does not penetrate to the inner leaf of the wall at the door head.

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Answer

For this part, the design detail should include:

Stepped Damp Proof Course (DPC): Illustrate a stepped DPC, which should be positioned between the inner and outer leaf to effectively prevent moisture ingress.
Ensure that all materials and placement of DPC comply with relevant building regulations, reflecting best practices for moisture control.
It might also be beneficial to indicate additional waterproofing measures, if applicable, for comprehensive moisture management.

A four panel solid wooden door and doorframe are fixed in the external wall of a dwelling house, as shown in the accompanying sketch - Leaving Cert Construction Studies - Question 4 - 2008

Worked Solution & Example Answer:A four panel solid wooden door and doorframe are fixed in the external wall of a dwelling house, as shown in the accompanying sketch - Leaving Cert Construction Studies - Question 4 - 2008

To a scale of 1:2 (half full size), draw a vertical section through the external wall, doorframe and door.

Include on your drawing a design detail to ensure that moisture does not penetrate to the inner leaf of the wall at the door head.

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