Build Specification

Whether you're looking for a luxury retreat for weekend breaks or a residential model for year round comfort, our latest collection of stunning holiday homes can be produced to a variety of build specifications, tailored to suit your chosen lifestyle.


All of our standard models are built to exceed the requirements of EN 1647, the European industry-wide regulation for the manufacture of caravan holiday homes. This specification dictates that compliant holiday homes are suitable for use as temporary or seasonal accommodation on a holiday basis, and are not suitable as a permanent residence.

All Willerby and BK Bluebird branded models are certified by the National Caravan Council (NCC) who work with many partners (British and European Standards Organisations, Health & Safety Executive, Gas Safe, Fire Inspectorate etc.) to ensure that the industry’s products comply and are safe. Every model that has been approved is licensed to carry an NCC Approved Badge. NCC

All of our products offer superior levels of structural integrity and thermal dynamics, as well as lagged water pipes for extra protection during colder weather conditions, providing comfortable and practical holiday accommodation.

Thermal Comparison Chart

EN 1647 BS 3632 ThermaMax
Wall Insulation 28mm polystyrene insulation board 50mm high performance rigid insulation wrapped with low emissivity composite foil 50mm high performance rigid insulation wrapped with low emissivity composite foil
Roof Insulation 120mm glass wool 120mm glass wool 120mm glass wool
Floor Insulation 50mm glass wool* 100mm glass wool 100mm glass wool
Windows & Doors Single glazing or energy efficient PVCu double glazing (where supplied) Low E Argon-filled PVCu double glazing Low E Argon-filled PVCu double glazing

* Vogue Lodge supplied with SIPS (Composite Insulated Floor Structure) as standard

Residential Build Specification (BS 3632)

If you wish to reside in your holiday home all year round, then you must select the British Standard (BS 3632) optional upgrade.

This standard defines the manufacturing specification that makes our products suitable for year-round use, including safety, acoustic and thermal insulation, construction and durability.

Additional Features:

• High performance wall, roof and floor insulation
• Gas central heating with high-efficiency condensing combi-boiler (where not supplied as standard)
• Low 'E' Argon-filled PVCu double glazing
• Enhanced ventilation in bathrooms, shower rooms and WCs

Please refer to Park Licence and associated planning conditions when selecting Holiday Home (EN 1647), Residential (BS 3632), or European specification versions of any holiday home model. Please note that in order to comply with the Residential (BS 3632) living space requirements, certain models will be supplied with one single bed in the second and/or third bedroom, rather than twin beds. All models also require secondary external doors (i.e. Outlook doors, such as French doors or patio doors) to meet the required specification.

Due to the complex volumetric space calculations required to meet the specification, BS 3632 is only available on selected models:

2 Bedroom model 3 Bedroom model
Vogue O O
Linear O -
Aspen O O
Skyline O -
Sheraton O N/A
Winchester O -
Chambery O -
Granada O O
Lyndhurst O -
Avonmore O O
Brockenhurst - -
Rio Premier - -
Sierra O -
Caprice - -
Rio Gold 12ft - -
Rio Gold 10ft - -
Vacation - -
Villa Deluxe - -

O Optional Extra | - Not Available

Therma Max Logo

Further protection from the elements

Designed by Willerby to offer a more flexible thermal upgrade package, Therma-max is an option that provides the same insulation and window specification as BS 3632, but does not require the secondary external doors or the central heating system that are dictated by the residential specification. In addition Therma-max does not restrict the number of beds in the twin bedroom(s), is available on all models and it is not affected by the Park Licence conditions.

Safety features

Willerby is committed to providing the very highest levels of safety for its customers.

All Willerby and BK Bluebird holiday homes are built in accordance with British Standard Holiday Home specification (EN 1647) or Residential Specification (BS 3632), and are certified by the National Caravan Council (NCC).

As well as undergoing a full Risk Assessment during the design process; the following safety equipment and features are fitted as standard in all our holiday homes:

  • Fire extinguisher
  • Smoke alarm
  • Carbon Monoxide (CO) detectors (see below)
  • Emergency escape window(s)
  • Flame and match retardant soft furnishings
  • Toughened glass to required areas
  • Thermostatic shower and tap mixers
  • Low threshold doors
Carbon Monoxide (CO) Detectors
Carbon Monoxide (CO) Detectors

All our holiday homes are fitted as standard with Carbon Monoxide (CO) detectors. These constantly monitor CO levels, providing early warning of the gas well before danger levels are reached, giving you total peace of mind.