General Specification

GENERAL  SPECIFICATION

As Approved Manufacturer Members of the NCC all of our homes are built in accordance with BS3632:2015

Chassis 

Bespoke built using hot rolled steel beam construction minimum 180mm x 75mm gauge steel with 75mm cross members. All chassis have detachable telescopic draw bars, front and back and sprayed painted as defined BS EN ISO 12944-2:1998 to a C3 category or fully galvanised depending on the individual specification. All homes are supplied with galvanised pyramid axle stands.

Internal Walls 

Clad with 9mm plywood or 9mm moisture resistant MDF, fully prepared and decorated achieving a minimum Class 3 surface spread of flames as defined in BS476.

Floors 

120mm x 47mm tanalised timber joists treated in accordance with BS8147, bolted to the chassis at 400mm centres. 18mm moisture resistant chipboard. 100mm earthwool insulation over a one piece heavy duty vented barrier.

Roof

145mm x 47mm rafters and 38mm x 76mm timber trusses laid at 600mm centres in accordance with BS5268. Part free and produced to BSEN1059. Profiled granular coated lightweight metal roof sheets achieving a minimum Class 1 surface spread of flames as defined in BS476.

External Walls

38mm x 76mm timber at 400mm centres. Reflective breathable membrane classified as Class E in accordance with BSEN13501-1 2002 overlaid with 40 x 9mm plywood strips to allow for crossflow ventilation behind the cladding. The finish is dependent on the individual specification.

Ceilings

Lounge and living area ceilings vaulted to an angle of 0-21 degrees depending on size and design. Remaining ceilings are flat to a minimum height of 2.3m (7ft 7”) depending on design. Clad with 9mm or 12mm MDF T&G panelling or 9mm decorated plywood meeting minimum Class 3 surface spread of flames as defined in BS476.

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FAQS

Electrical 

Standard electrical installation to IEE regulation (Current Edition). Smoke conforming to BS EN 14604 and CO alarm conforming to BS EN 50291-1 fitted as standard. Vaulted and flat ceilings are fitted with low energy light fittings. All lights are fire rated to BS476 parts 21 and 23. All bathrooms are fitted with GU10 IP65 fire rated to BS476 parts 21 and 23. Electrical installation conforms to BS 7671.

Doors & Windows 

All homes are fitted with UPVC windows and doors with double glazed units as standard with 28mm glass conforming to BS 6262-4 and BS 6206. All are internally beaded and have shoot bolts and dead locks. Internally the frames are white and externally have various optional colours. U-value 1.4 W/m²k.

Plumbing 

All piping is the Hepworth plastics two pipe system. All exposed piping for heating and the domestic water system is lagged to BS5608. The hot water supply to baths and showers shall be limited to 48 °C by a TMV 2 rated thermostatic mixing valve conforming to BS EN 1111 and BS EN 1287, to prevent scalding. The completed domestic water and sanitary system conforms to BS EN 806.

Fascias and Guttering

Fascias are uPVC in a range of colours. Rainwater gutters and downpipes are uPVC or galvanised finish.

Heating 

Gas or electric combi-boiler (depending on individual specification) including 24 hour timer, providing both instant domestic water and central heating. All radiators are fitted with a thermostatic radiator valves as standard and checked by a Gas Safe registered engineer. Gas installation conforms to BS 6891 and BS 5440-1.

INSULATION

ROOF :145mm spray polyurethane foam 
U-value 0.20 W/m²k;

WALLS: 76mm spray polyurethane foam 
U-value 0.32 W/m²k

FLOOR: 100mm earthwool 
U-value 0.29 W/m²k

Exterior Cladding 

The exterior cladding is available in 3 variations:

CanExel 

Pre-finished weatherboard compressed with resin, wax and aluminium under extreme heat and pressure. Factory finished with five coats of backed acrylic paint. CanExel is available in a range of colours and styles. Achieves a minimum Class 3 surface spread of flames as defined in BS476

Wood Clad 

Natural Cedar or graded Scandinavian Redwood log-lap cladding. Redwood cladding is hand spray stained with primer and two coats of protective exterior grade flexible top coat wood stain to a high finish leaving a micro porous protective film. The wood stain is resistant to bacterial, mould and UV attack. Wood cladding achieves a minimum Class 3 surface spread of flames as defined in BS476

Stipple

A water-borne medium to heavy textured, protective, decorative, highly flexible, anti-carbonation coating applied to a magnesium oxide base board. Decorated to achieve a “traditional high build” finish style in a range of colours. Composed of titanium dioxide, light fast coloured pigments and extenders with vinyl acetate copolymer binder. BBA approved 15 years proven durability. Achieves a minimum Class 1 surface spread of flames as defined in BS476
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