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Flashcards in Construction Technology 2 Deck (7)
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1
Q

Allendale Road: Why did you use an inverted system?

A

Offered an enhanced level of protection due to the proposed foot fall appose to a warm of cold system.

2
Q

Allendale Road: Tell me the composition of the inverted system? And discuss each element.

A
  1. Surfacing / Ballast (e.g. paving or pebbles)
  2. Water Flow Reducing Layer
  3. Inverted Roof Insulation Boards (e.g. extruded or expanded polystyrene)
  4. Waterproofing System
  5. Structural Deck (e.g. concrete)

1 Top of roof
5 Bottom of roof.

3
Q

Allendale Road: What were the paving sitting on?

A

Paving supports / pedestals

4
Q

Allendale Road: Why were the paving sitting on adjustable pedestals?

A

To provide a level surface for the paving as tapered thermal insulation was used.

5
Q

Allendale Road: Why did you use a bitumen system to the terrace appose to a single ply?

A

More robust due to having multiple layers (usually 3, 2nr under layers and a top layer) appose to the single ply (1 layer).

Robustness required due to the proposed use.

6
Q

Allendale Road: Why was a SE required?

A

To determine the increased live and dead loads and if any upgrade works were required to accommodate.

7
Q

Allendale Road: What were the live loads and what are dead loads?

A

Live loads = people

Dead loads = bitumen roof covering (heavy), paving, furnishings etc