2.5.2-1
External walls
Component Information
- Code:
- 2.5.2-1
- Sequence:
- 1
- Unit:
- m2
- Sub-Element:
- 2.5.2 - 2 External enclosing walls below ground level
External walls
details to be stated. Note: Reinforcement rate (kg/m3) and formwork finish for in-situ concrete walls to be stated
Component Statistics
Measurement Rules
Included Items
Excluded Items
Measurement Rules (10)
The area measured is the area of the external wall, measured on the centre line of the external wall, with no deductions for windows or external doors.
Where more than one type of external wall system is employed, the area measured for each external wall system is measured separately.
Where more than one external wall system is employed, the combined area of each external wall system should equal the total area of all external wall systems.
The area measured for external wall finishes is the surface area of the external wall component to which the finish is to be applied.
Other cost-significant subcomponents, such as cover strips and window boards, that form an integral part of internal skins/backing walls to curtain walling systems, cladding systems, etc. are to be measured by area (m2) or linear measurement (m), or enumerated (nr) and identified separately.
The length of linear components measured is their extreme length, over all obstructions.
Descriptions should include the amount of any PC sum included in the unit rates applied to the item.
Curved work is to be described and identified separately.
Work to existing buildings is to be described and identified separately.
Contractor-designed work is to be described and identified separately.
Note: Where the contractor is only responsible for designing specific elements and/or components of the building project (i.e. not the entire building project).Included Items (27)
External basement walls below ground floor level not in contact with earthwork or part of an embedded retaining wall construction (i.e. not retaining walls).
External enclosing walls (i.e. both internal and external skins).
Underside of returns in external walls.
Parapet walls for roofs, including copings and cappings, formed as part of the external walls.
Gable walls formed as part of the wall construction.
Chimneys forming part of external walls.
Columns and beams in unframed structures.
Curtain walling (designed and fixed as an integrated assembly, complete with opening lights, doors, ventilators, etc.).
Structural glazing assemblies, etc. (i.e. glazing that forms an integral part of a cladding system).
Profiled sheet cladding systems, including cladding rails, etc.
Photovoltaic glazing or cladding panels where an integral part of a curtain walling system, or structural glazing assemblies or profiled sheet cladding systems.
Rigid sheet cladding systems, including support framework.
Panelled walling systems, including panels to a frame structure.
Internal skins/backing walls to curtain walling systems, cladding systems, walling systems, etc. including window boards, cover strips, etc.
Concrete walls, including reinforcement and formwork.
Masonry walls (i.e. brickwork, blockwork and stonework), including forming cavities, wall ties, thermal insulation, etc.
Plinths, cornices, ornamental bands and quoins that are formed from a different material from general wall.
Lightweight steel frame systems, including cladding and insulation.
Thermal insulation, membranes, etc.
Timber and plastic cladding systems (e.g. weatherboarding).
Insulating render systems.
Finishes applied to external wall (e.g. paint systems, coating systems, ceramic/stone cladding, tiling and other materials).
Finishes to underside of returns in external walls.
Planted ‘green’ walls, including protection layer, drainage layer, filter membranes and growing medium.
Forming openings in external walls for external windows and external doors, including lintels/beams; head courses; damp-proof courses; cavity trays; closing cavities; and all other work to soffits, sills and reveals of openings.
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)
Basement excavation (included in sub-element 1.1.4: Excavation works).
Temporary or permanent support for the excavation, e.g. caissons, sheet piling, continuous piling, etc. (included in sub-element 1.1.2: Excavation support).
Basement wall construction, where wall in contact with earthwork (included in sub-element 1.1.4: Excavation works).
Embedded basement retaining wall construction (included in sub-element 1.1.5: Retaining walls).
Columns and beams that form an integral part of the structural frame (included in element 2.1: Structural frame, as appropriate).
Concrete walls, core walls, etc. where an integral part of the structural frame (included in sub-element 2.1.4: Concrete frame).
Walls provided by framing system such as off-site manufactured timber frames or tunnel form (included in element 2.1: Structural frame).
Applied finishes to inner faces of external walls, including dry lining systems (included in sub-element 3.1.1: Internal finishes).
Navigation
Export
API Access
Access this component data programmatically:
GET /api/components/2.5.2/1/- Complete component details