Costs: Timber cladding for walls | Features

Timber cladding
	Capital cost £/m2	Net present value for 60 years £/m2	Service life years

Timbers not requiring treatment, heartwood only
Western red cedar thuja plicanta finished size 18 mm thick and 125 mm exposed face	38	50	40-60
European larch larix decidua finished size 21 mm thick and 135 mm exposed face	32	47	30-40
Douglas fir pseudotsuga menziesii finished size 19 mm thick and 125 mm exposed face	35	58	25-35
European oak quercus robur finished size 19 mm thick and 125 mm exposed face, screw-fixed	46	59	40-60
Treated timbers
European redwood pinus sylvestris heat-treated finished size 25 mm thick and 125 mm exposed face	28	48	25-35
Lodgepole pine pinus contorta finished size 16 mm thick and 125 mm exposed face. Preservative treated and precoated high performance paint system	32	70	25-35
European whitewood picea and abies species finished size 19 mm thick and 120 mm exposed face. Preservative treated. Paint or stain finish	23	190	20-30
Table notes
A discount rate of 3.5% is used to calculate net present values. Service lives are an average
All finished naturally and fixed using stainless steel nails, unless otherwise stated
Costs are based on 100m2 external wall, vertical cladding and include replacement, maintenance, allowance for minor repairs and repainting
Recoating cycles depend on the rate deterioration of the protective film. Typically repainting is carried out every two to five years; longer for high-performance paint systems
A cost analysis based on project-specific information is essential for a realistic best-value appraisal

Further information
Building LifePlans provide latent defects warranty for buildings
See www.componentlife.com for building component durability information
For more information email peter.mayer@buildinglifeplans.com or telephone 020-7204 2441