Costed: Cladding

Ruby Galloway, associate director at Gleeds R&D, looks at cladding costs

Amendments to the Building Regulations mean the building envelope has to meet increasingly stringent performance criteria. Designers and engineers should be fully versed in all applicable safety legislation, particularly with the requirements of the Building Regulations Part B (Fire Safety), Part E (Resistance to Sound) Part K (Protection from Falling) and Part L (Conservation of Fuel and Power).

Amendments to Part L have had major implications for cladding design, especially in respect of overheating – care must be taken when specifying insulation, and also to ensure that the air tightness of the building is sound and tested.

Many of the claddings incorporate BREAAM compliant features such as recycled polyamide for thermal bridging, reduced fossil fuels and water consumption.

Some cladding types may be designed as a ventilated facade system. Electrically operated louvre-blinds have added an innovative edge to provide efficient solar and glare control to many glazing systems.

Often, the cladding sub-contractor will have design responsibility for the cladding element, but the employer and designer should ensure that the functionality of the building is communicated at the outset. Other factors to consider at an early stage of the design are buildability and access for cleaning and maintenance.


The rates stated below represent a guide to cladding costs and are current as at Q4 2015 are based to a location of UK mean.
No allowance is made for sundry costs or related preliminaries costs. VAT is excluded.


PANELLED WALLING


Precast concrete panels; including insulation; lining and fixings generally
7.5 m x 150mm thick x storey height
standard panels    £206-£247/m²
standard panels; exposed aggregate finish    £226-£278/m²
reconstructed stone faced panels    £257-£309/m²
brick clad panels (PC £400.00/1000 for bricks)    £360-£484/m²
natural stone faced panels (Portland Stone or similar)    £442-£535/m²
marble or granite faced panels    £576-£772/m²
Tiles (clay/slate/glass/ceramic)
machine made clay tiles; including battens    £30-£41/m²
standard panels; exposed aggregate finish    £226-£278/m²
best handmade sand faced tiles; including battens    £36-£46/m²
concrete plain tiles; including battens    £41-£51/m²
natural slates; including battens    £72-£92/m²
20 x 20mm thick mosaic glass or ceramic; in common colours;
fixed on prepared surface    £92-£113/m²


PROFILED METAL SHEETING


Steel covering, profiled A50-30 to outer face, GA600 lining to inner face incl profile filers and sealing, fixing to and incl vertical and horizontal secondary supports
250mm girth    £206-£247/m²
standard panels; exposed aggregate finish    £226-£278/m²
reconstructed stone faced panels    £257-£309/m²
brick clad panels (PC £400.00/1000 for bricks)    £360-£484/m²
natural stone faced panels (Portland Stone or similar)    £113.32-£133.92/m²
Extended, hard skinned, foamed PVC-UE profiles sections; Class 1 fire rated to BS 476, part 7, in white finish; vertical fixed to timber
100mm shiplap / 150mm shiplap     £62-£72 / £52-£62/m²
Extra over for vertical angles / raking cutting    £5-£15 / £5-£10/m²
Composite wall panel; micro rib, coated steel outer and inner liners, 600-1000mm widths
60mm thick; U-value 0.35 / 80mm thick; U-value 0.26    £82-£93/£82-£103/m²
100mm thick; U-value 0.20     £92-£113/m²
Composite wall panel; flat, coated steel outer and inner liners, 600-1000mm widths
60mm thick; U-value 0.35 /100mm thick; U-value 0.20    £134-£155/£144-£175/m²
Associated flashings: 0.7mm pre-coated steel sill; 300mm girth     £15-£21/m²
composite top hat     £21-£31/m²


RIGID SHEET CLADDING


Melamine finish solid laminate panels

6mm thick cladding to walls over 300mm / up to 300mm wide    £82-£93 / £31-£41/m

Mineral enamel faced rigid fibre cement sheeting

7.5mm thick cladding

over 300mm / up to 300mm wide     £72-£93 / £26-£31/m
external angle trim     £10-£21/m
100mm / 200mm / 300mm    £15-£21/£21-£31/£26-£31/m
Weatherboarding; high density resin-bonded cellulose fibre panels, including secondary supports and fixing
8mm face fixed to timber battens / aluminium rails    £134-£165/m / £155/m
10mm secret fixed to aluminium rails     £185-£227/m


RAINSCREEN


Tongued and grooved tantalised softwood boarding; including timber battens
25mm thick to walls     £41-£52/m²
Timber shingles, Western Red Cedar, preservative treated in random widths; not including any sub-frame or battens
26mm thick to walls     £52-£67/m²
Western Red Cedar tongued and grooved wall cladding on and including treated softwood battens on breather membrane, 10mm backing board, 50mm insulation board, fixed to a steel frame system including sealing all joints etc
26mm thick to walls, boards laid horizontally     £72-£93/m²
Aluminium composite cladding with thermoplastic cores, back ventilation, including insulation, vapour control membrane and aluminium support system
4mm thick, fixed to walls     £134-£165/m²
Terracotta clay cladding, including insulation, vapour control membrane and aluminium support system
400 x 200 x 30mm tile cladding; to walls     £236-£288/m²
Curtain walling excluding any integral doors and/or windows
Stick curtain walling system, proprietary solution, polyester powder coated solid colour matt finish or natural anodized curtain walling
Flat system    £319-£391/m²
Unitized curtain walling system, proprietary solution, polyester powder coated solid colour matt finish or natural anodized curtain walling      
Flat system    £649-£793/m²