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Specification options
Doors Capital cost, £/unitNet present value for 60-year life, £/unit Service life, years
Hardwood framed doors    
Permeable hardwood double vacuum impregnated with an organic solvent preservative to BWPA schedule V1 or V2 or non-permeable to schedule V3, after machining. Joints morticed, held with non-ferrous mechanical connection aids. Joints fully coated in type ‘D4’ adhesive to BS EN 204 to seal end grain. Timber quality ‘Class J30’ of BS EN 942. Plywood to BS EN 636–3 for external use.42562535
Permeable or non-permeable species immersed in organic solvent for minimum three mins after machining. Doweled joints, fully coated with type ‘D3’ adhesive to BS EN 204 to seal end grain. Plywood to BS EN 636–3 for external use. 36061915
PVCu   
Third-party assessed hinged doors with mid rails. PVCu hollow profiles, multi-chamber sections internally reinforced with close fitting stainless steel, aluminium or pre-galvanized (min 275g/m2 zinc both sides) steel sections. Construction to BS 7412 where relevant. To include hardware approved by third party such as British Board of Agrément or London Housing Consortium.43059230
Film coloured PVCu hollow profile hinged doors with mid rails, multi-chamber sections, reinforced with close fitting stainless steel, aluminium or pre-galvanized (min 275g/m2 zinc) steel sections. Plastics to BS 7414 (unmodified plastics) or BS 7413 (modified plastics) and construction to BS 7412. Film to comply with BS 7722. 38067720
Composite: Glass reinforced plastics or plastics faced cored doors   
Third party approved door with min 75 mm width timber stiles and rails. Closed cell foamed insulant core. Compression moulded fibreglass face without joints. Heavy duty rated to BS DD 171 for mechanical impact strength. 31043330
Timber stiles and rails. Structural honeycomb substrate and insulating foam-faced core. Glassfibre reinforced composite resin face.25076310