2.3.2-1
Roof coverings, non-structural screeds, thermal insulation, and surface treatments
Component Information
- Code:
- 2.3.2-1
- Sequence:
- 1
- Unit:
- m2
- Sub-Element:
- 2.3.2 - 2 Roof coverings
Roof coverings, non-structural screeds, thermal insulation, and surface treatments
details to be stated
Component Statistics
Measurement Rules
Included Items
Excluded Items
Measurement Rules (7)
The area to be measured for roof coverings, etc. is the surface area of the roof covering to the extremities of the eaves or to the internal face of the parapet wall, whichever is applicable, excluding the area of rooflights, skylights and openings. No deduction is made for voids less than 1.00m2 in surface area.
The area to be measured for dormer coverings is the surface area of the dormer roof coverings to the extremities of the eaves. No deduction is made for voids less than 1.00m2 in surface area.
Where more than one type of roof covering system is employed, the area measured for each system is the area covered by the system.
The length of linear components measured is their extreme length.
Curved work is to be described and identified separately.
Work to existing buildings is to be described and identified separately.
Where the contractor is only responsible for designing specific elements and/or components of the building project, contractor-designed work is to be described and identified separately.
Note: Applicable when the contractor is not responsible for the entire building project.Included Items (13)
External and internal roofs.
Roof cladding/coverings (e.g. tiling, slating, sheet coverings and thatching), including battening, underlay, vapour-control layers, hip, valley, eaves and verge treatment, flashings, edge trims and other components required for the applicable cladding/covering system.
Mastic asphalt roofing, liquid applied roof coatings and built-up felt roof coverings, including underlay, vapour-control layers, flashings, edge trims, skirtings, upstands and other boundary work, and other components required for the applicable roof covering system.
Photovoltaic devices (e.g. tiles, slates and profiled sheets) where an integral part of a roof covering system.
Roof ventilation tiles.
Non-structural screeds to roofs, including reinforcement and worked finishes.
Thermal insulation to roofs, including insulation overlays for inverted roofs.
Surface treatments for roof coverings (e.g. solar reflective painting, chippings, etc.).
Paving tiles, paving slabs, etc. to form service walkways, roof terraces, etc. on roof surfaces.
Green roofs and roof gardens, including protection layer, drainage layer, filter membranes and growing medium.
Planting for green roofs/roof gardens.
Sundry items.
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 (8)
Dormer construction and windows to dormers (included in sub-elements 2.3.1 and 2.6.1, as appropriate).
Vertical cladding for walls where of the same construction as the roof (included in element 2.5).
Structural screeds to roofs (included in sub-element 2.3.1).
Finishes to ceilings under roof structure (included in sub-element 3.3.1).
False ceilings and suspended ceilings under roof structure (included in sub-elements 3.3.2 or 3.3.3, as appropriate).
Solar water collectors, heating panels, etc. (included in sub-element 5.8.5).
Photovoltaic tiles, panels, etc. where not an integral part of the roof covering system (included in sub-element 5.8.5).
Roof and smoke vents (included in sub-element 2.3.5).
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