NBS Source
List your products

This product is no longer available


A robust, but lightweight, non-loadbearing security wall that offers high resistance to determined attack. It is used in commercial and industrial applications, such as partition walls in banks and building societies, custodial and defence establishments, and industrial, retail and data storage buildings.

The wall comprises Security Sheet – a trapezoidal galvanized sheet steel section – which is secured to Gypframe GA4 Steel Angle at the head and base. It is lined on both sides with two layers of 10 mm Glasroc F MultiBoard. For extra security additional steel sheet can be installed to the 'risk' side.

Not suitable for use in areas subjected to continuous damp or humid conditions. Specify MR (moisture resistant) boards in intermittent wet areas.


  • Strength and robustness: Satisfies BS 5234 requirements up to Severe Duty.
  • Fire resistance: Up to 150 minutes.
  • Sound insulation: Up to Rw 40 dB.

General information
Uniclass 2015
Ss_25_10_30_35 Gypsum board partition systemsPrimary

K10/125 Metal stud partition system

K10/30 Metal stud

Specification data - Gypsum board partition systems
Product Reference


Studs -

Gypframe security sheet


Not applicable

Head condition -

50 mm x 25 mm Gypframe GA4 steel angle, fixed to ___

Insert e.g. 'underside of ceiling joists'.


2 x 10 mm Glasroc F MultiBoard to each side of security sheet

Square edged.

Finishing -

Taped seamless finish

Skim coat plaster finish

Not suitable for use with Gyproc Board Moisture Resistant Grade.

To receive ceramic tiles

Primer/ Sealer

One coat of Gyproc Drywall Prime

Two coats of Gyproc Drywall Sealer

For use where vapour control is a consideration.



Rigid beads/ stops

Other requirements


Flat, 0.7 mm thick galvanized steel sheet internal lining (not by British Gypsum) to risk side of security sheet prior to lining

Product Options

Deflection allowance:

Consult British Gypsum technical literature for recommendations.