NBS Source
Sigmat LGSF System


For light steel framing in a 'warm frame' environment.


Patented light gauge steel framing sections and profiles. All Sigmat profile sections are manufactured using hot-dipped galvanized steel, to BS EN 10143, in grades from S280 and S450 as required. They have a Z275 coating and are supplied self-finished.

Features and benefits:

  • Does not suffer from fungal or biological deterioration and is not susceptible to insect infestation.
  • Framing solution for up to 15 storeys.
  • Sigmat primary stud component up to 17.8% stronger than non-patented alternatives. 

All Sigmat panels are designed to include pre-formed door and window openings and inner face is ready for the direct application of plasterboard lining finishes.

General information




Zinc Phosphate Primer

Z275, 75 microns DFT.



Light gauge steel and hot rolled steel.


Design life predictions are in excess of 250 years.

NHBC and other housing warranty providers require a design life in excess of 60 years, and accept the use of light gauge steel construction. Light steel sections provide a design life in excess of 100 years, even in uninsulated roof constructions.



Various dimensions depending on application, consult manufacturer.



Ss_20_10_75_45 Light steel framing systemsPrimary


G10/30 Cold-formed galvanized steel

G10/170 Cold-formed galvanized steel

Specification data - Light steel framing systems Enhanced data

Framing members

Cold-formed galvanized steel sections

Hot-rolled galvanized steel sections

Sheets and boards

12 mm calcium silicate board.

Connection fasteners


Type of fastener

SigBolt .

Sits flat and level in embossed connection hole, assisting towards a flush finish for plasterboard.

Anchors to concrete and masonry


Type of anchor

Cast in anchor rods.


Recess bolts.

System accessories

Consult manufacturer and insert requirements.

Environmental information

Country of material origin

United Kingdom

Embodied carbon

0.8–1.2 CO2e/kg.



Recycled content

40 %