Every part of a conversion, three ways.

What cladding + furniture screw to.

• Budget

  Timber/ply furring battens + fixings

  generic

  12 kgest.≈ £60

  Framework cladding + furniture screw to. Rivnuts/screws. Keep sections modest.

SNEAKY HEAVY. 6mm ~12kg/sheet, 9mm ~17kg/sheet. 3-5 sheets = 36-85kg.

• Mid

  9mm birch ply lining (furniture-grade)

  birch

  55 kg✓ verified≈ £220

  Thicker birch for a premium finish/structural walls. ~17kg/sheet. Use only where needed; thinner elsewhere.

HEAVY + SAFETY: must be M1 crash-tested + floor-strengthened to carry passengers.

• Mid

  3/4-width rock'n'roll bed, M1 crash-tested

  Fabworx/generic

  84 kg✓ verified£610
  Needs qualified sign-off (gas/electrical)

  Seat by day, bed by night, 2 seatbelts — legally carry passengers IF M1 cert + floor strengthening plates. ~84kg.

• Premium

  RIB Altair seat-bed (M1 + TUV, on rails)

  Scopema RIB

  95 kgest.≈ £2,500
  Needs qualified sign-off (gas/electrical)

  Premium seat-bed, M1+TUV, flip-over, ISOFIX options, optional rails. Safest/comfiest, heaviest/priciest. Raises resale.

Lightest sleeping option. BED ONLY — cannot carry passengers.

• Budget

  Timber/ply fixed bed frame + slats + garage

  DIY

  40 kgest.≈ £150

  DIY frame from battens + ply (Cat 11), slatted base, storage garage. Lightest/cheapest. BED ONLY.

• Mid

  Lightweight fixed bed (aluminium extrusion)

  generic

  30 kgest.≈ £350

  Aluminium T-slot or thin-ply frame to cut weight. Good for payload-tight builds. Bed-only.

Mostly ply (see Cat 11). Full fit-out adds 60-120kg.

• Budget

  DIY ply cabinet carcasses

  DIY

  40 kgest.≈ £120

  Units from 12/15mm ply — bulk of furniture weight. Thinner ply/lightweight board where non-structural (Cat 11).

• Mid

  Lightweight board carcasses (poplar/hex-core)

  generic

  28 kgest.≈ £400

  Poplar ply or honeycomb/hex-core cuts cabinet weight substantially vs birch. The pro weight-saving trick.

Soft-close runners, gas struts, positive catches (or doors fly open driving).

• Budget

  Hinges, gas struts, drawer runners, catches

  Blum/generic

  4 kgest.≈ £80

  Soft-close runners, gas struts for lids, positive catches so doors stay shut driving.

Travel seats fall under M1/belt/strengthening rules.

• Mid

  Bench seat / additional seating carcass

  DIY

  15 kgest.≈ £150

  Extra fixed bench/storage. If used for travel, same M1/belt/strengthening rules apply.

Laminate/timber/bamboo. Heavier per metre than it looks.

• Budget

  Laminate kitchen worktop (offcut)

  generic

  10 kgest.≈ £40

  Cheap, hardwearing laminate cut to size. Heavier than it looks per metre.

• Mid

  Solid timber / bamboo worktop

  generic

  12 kgest.≈ £120

  Solid wood/bamboo for a premium look. Seal well. Oil-finish.