Home > Companies > CDI Innovative Construction Materials Ltd > Lewis® Dovetailed Sheeting

Lewis sheets are rolled, self-supporting, 16mm deep,,dovetailed profile steel reinforcement sheets which are used for shuttering and reinforcing lightweight concrete floors of limited thickness on timber or steel floor framing.


  • Simple to use due to special rolled profile.
  • Can be laid directly onto floor joists or steel beams. Timber flooring may be omitted, resulting in savings on floor height and weight.
  • Fire resistance ratings of 60, 90 and 120 minutes.
  • Airborne and impact sound transmission values according to Building Regulations (E&W), Approved Document E.
  • Increased strength and rigidity of the interconnected floor system results in an extra load-bearing capacity of up to 30% for the floor as a whole.
  • Water resistant structural flooring.
  • Profile allows air circulation essential for timber preservation.
  • Total floor thickness as low as 36mm, acoustic floors 50 mm.
  • High load bearing capacity combined with low dead load of 0.9 kN/m² (at 50mm).


  • Sound and fire resistant floors separating compartments.
  • Fire resistant floors for high-risk areas.
  • Water resistant floors/ tiled floors on timber in bathrooms, toilets and kitchens.
  • Underfloor heating on timber joists or steel beams.
  • Finished floor ready to accept ceramic tiles, terrazzo, tiles natural stone or other floor coverings.
  • Raised high-stability floors in shops, restaurants and offices.
  • 'Inter-connected structure' for floors with inadequate strength and/ or rigidity.
  • Structural, acoustic and fire rated floors within light gauge steel load bearing framed buildings.
  • Concrete floors within modular buildings, traditional build, timber frame, SIPs or ICF building systems.
  • Load bearing and vibration proof plant room, dance hall and gym floors.

Standard product features

Sheet width:

630 mm.

Steel gauge:

0.5 mm.

Profile height:

16 mm.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-65-52/400 Steel profiled sheet

Product specification

An important note about specifying



CDI Innovative Construction Materials Ltd


+44 (0)1388 728833

Product reference

Lewis Dovetailed Sheeting


[1220 mm]
[1530 mm]
[1830 mm]
[2000 mm]
[2500 mm]
Standard stock lengths.

Manufacturer details

Unit 48C, Avenue 4,
Chilton Industrial Estate,
County Durham, DL17 0SQ
Tel +44 (0)1388 728833
Fax +44 (0)1388 728834
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