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A living room has a solid concrete ground floor with a 20 mm quarry tile finish as shown - Leaving Cert Construction Studies - Question 1 - 2010
Question 1
A living room has a solid concrete ground floor with a 20 mm quarry tile finish as shown. The external wall of the living room is a 350 mm concrete block wall with a... show full transcript
Worked Solution & Example Answer:A living room has a solid concrete ground floor with a 20 mm quarry tile finish as shown - Leaving Cert Construction Studies - Question 1 - 2010
Step 1
Part (a) - Draw a vertical section through the external wall and ground floor
Answer
To draw a vertical section at a scale of 1:5, include the following components:
- Strip Foundation: Indicate a traditional strip foundation, typically made of concrete.
- Wall Components: The external wall consists of a 350 mm concrete block, with an outer leaf of 100 mm and an inner leaf also of concrete blocks, ensuring the total thickness is accounted for.
- Insulation: Add the thermal insulation cavity of 50 mm between the two leaves of the wall.
- Floor Finish: Demonstrate the 20 mm quarry tiles laid on the 150 mm concrete floor.
- Dimensions: Clearly label the dimensions and components in the section with appropriate symbols.
Step 2
Part (b) - Design detail to prevent a thermal/cold bridge at concrete floor and external wall
Answer
To effectively design to prevent a thermal/cold bridge, the following elements should be incorporated into your drawing:
- Inner Leaf: Depict an inner leaf with thermal blocks having a low thermal conductivity value (δ = 0.20 W/m·K) from the foundation to the floor level (b).
- Cavity Insulation: Show cavity wall insulation (b1) that aids in thermal performance.
- Floor Level Insulation: Indicate that rigid insulation is inserted under the floor level directly above the concrete to limit heat loss (b2).
- Flexible Seal: Illustrate a flexible sealant added between the bottom of the walls and the floor to facilitate thermal performance.