0.4.3-1

Ground gas venting

Unit: m2 Sub-Element: 0.4.3 - 3 Ground gas venting measures
Component Information
Code:
0.4.3-1
Sequence:
1
Unit:
m2
Sub-Element:
0.4.3 - 3 Ground gas venting measures
Description:

Ground gas venting

Details to State:

details to be stated

Component Statistics
2
Measurement Rules
3
Included Items
3
Excluded Items
Measurement Rules (2)
C1 1

The area measured is the area affected by the as venting measure.

C2 2

Other cost-significant components are to be described and identified separately.Such components are to be measured by area (m2) or linear measurement (m), or enumerated (nr) separately.

Included Items (3)
1.

Ground gas venting measures, including:• gas-proof membranes • perforated collection pipes • proprietary gas dispersal fin layers • radon sumps • vent pipes, including vertical risers to vent at a high level.

2.

Sundry items associated with ground gas venting measures.

3.

Where works are to be carried out by a subcontractor, the subcontractor’s preliminaries, design fees, risk allowance, overheads and profit, with allowance for these to be made within unit rate applied to element or component.

Excluded Items (3)
1. Ref: 1.1.3

Gas-proof membranes also used as a damp-proof membrane (included in sub-element 1.1.3).

2. Ref: 1.1.3

Radon sumps underneath building slabs (included in sub-element 1.1.3)

3. Ref: 1.1.3

Granular venting layers (included in sub-element 1.1.3).

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