Steel / Metal Deck Upper Floors
UFH Installers : underfloor heating installation experts
LEWIS® Composite with Underfloor Heating Supply Systems
Underfloor Heating is becoming commonplace in modern residential, commercial and public building projects. A LEWIS® solution allows for all of the efficiencies of a ground floor to be constructed on the upper floors. Pipes are secured to the upper flanges of the sheet, fixed using a simple pipe clip or rail fixing system. A minimum 20 mm of concrete/screed coverage is all that is required above the pipes. An even spread of heat is transferred from pipes to sheets and within the floor slab.
Common Applications:
- Acoustic separating floors
- Fire-resistant floors
- Bespoke Green Guide A+ rated sustainable floors
- Can easily include underfloor heating
- Suitable sub-floor for ceramic or stone tiles, timber, or laminate floor finishes
- Can be used as a structural floor element within the building
- Mezzanine floors
- Bathrooms and wet-rooms
- Suitable for traditional, off-site construction and conversion projects
- Raised ground floors
A LEWIS® composite floor consists of the LEWIS® cold-rolled steel sheet covered with a relatively thin layer of C20/25 fine-grade aggregate concrete or CA25F4 free-flowing, self-curing liquid screed.
During the curing period, the LEWIS® deck acts as shuttering, but once the concrete/screed has cured and locked into the LEWIS® deck, it forms an extremely strong, composite, structurally sound floor; i.e., it becomes reinforcement for the concrete/screed.
ine-grade aggregate concrete can also provide a monolithic finish to create a “finished floor” option. The overall depth of a LEWIS® composite floor can be relatively thin, typically 50 mm in most cases.
Fire Resistance
LEWIS® Dovetailed Sheeting allows for the design of a composite floor that meets the standards without complicated details. Typically, a fire resistance of 60 to 120 minutes can be achieved with all standard LEWIS® details. Fire test certification compliant with EN 13501-2 is available.
- High-performance acoustic floors
- Underfloor heating in suspended floors (only 52mm thick)
- Works on any type of beam or joist
- High load-bearing capacity
- Low dead loads
- Thin overall thicknesses (generally 50mm, but from 36mm to 75mm)
- Simple and easy to install
- Fire ratings up to 120 minutes
- Suitable for liquid screeds and fine-grade concrete
- Suitable for use with ceramic or stone tiles
- Great for wet rooms
- Span joists (up to 2.5m centre to centre) or lay directly to an existing floor
- CAD drawings and BIM models available
