NBS Source
Siniat GTEC Thermal K Board
Compare variants


Suitable for use as a dry lining board laminate with significantly improved thermal insulation, it also has improved fire safety and improved moisture vapour resistance. Consult local building regulations for use in external walls in buildings over 18 m.


GTEC Thermal K Boards provide good thermal performance for both new build and refurbishment projects. An additional vapour control layer reduces the risk of condensation.

Features and benefits:

  • 9.5 mm plasterboard bonded to phenolic foam.
  • Approximately 50% thermal improvement over GTEC EPS.
  • Range of thicknesses between 30 and 70 mm.

Technical characteristics:

  • Fire, acoustic, thermal and duty performance dependent on the whole system. See Siniat Drywall Manual for Siniat system performances.

General information




2400 x 1200 mm

Uniclass 2015

Pr_25_71_35_88 Thermal laminate gypsum plasterboardsPrimary


K10/115 Metal stud partition system

K10/125 Metal stud partition system

K10/15 Lining on timber

K10/155 Wall lining system (metal studs)

K10/165 Wall lining system (metal framing)

K10/175 Wall lining system (metal furrings)

K10/185 Wall lining system (adhesive)

K10/205 Lining on timber

K10/220 Proprietary suspended ceiling system

K10/245 Ceiling lining on timber

K10/25 Ceiling lining on timber

K10/30 Metal stud

K10/35 Wall lining system (metal framing)

K10/41 Wall lining system (metal furrings)

K10/45 Wall lining system (adhesive)

K10/50 Suspended ceiling system on metal framing

Product range

GTEC Boards

Specification data - Thermal laminate gypsum plasterboards Enhanced data

Edge profile


Tapered down the long edges at the front. Edges are adhered together.

Overall thickness

30 mm.

Product Reference

Siniat GTEC Thermal K Board


Ivory on the front and orange-coloured foam board on the back.

Material and finish



Jointing finishing and painting.

The board should be jointed and finished with GTEC Jointing Systems.

Boards are suitable for gypsum finishing plasters manufactured to BS EN 13279-1:2008. The boards must be primed with GTEC Universal Sealer prior to being decorated.

Vapour control layer

All GTEC Thermal K Boards are manufactured with enhanced vapour resistance.


Use dabs of GTEC Universal Bonding compound.

 (Two additional nailable plugs required for fire safety).

GTEC Wall Lining Adhesive.

GTEC Shallow Wall Channels (MFCS).

GTEC Dryliner system.

Board size

2400 x 1200 mm.

Reaction to fire

Euroclass B-s1,d0.




Laminate weight.

20.7 kg.



0.021 W/m·K.

25-44 mm.


7.2 kg/m².

Thermal resistance (R-value)

0.92 m²K/W.

Water vapour resistance

667 MN·s/g.

Flexural strength

(To BS EN 520).

Longitudinal breaking load: ≥400 N.

Transverse breaking load: ≥160 N.


Density of the phenol-formaldehyde foam (PF).

40 kg/m³.

Various thicknesses of phenol-formaldehyde foam (PF) are factory-bonded to 9.5 mm board using PVA adhesive.

Thermal Conductivity:


0.19 W/m·K.


Siniat Plasterboard Portfolio: The Siniat range of Boards, Frames, Fixings & Finishings

Siniat Plasterboard Portfolio: The Siniat range of Boards, Frames, Fixings & Finishings

Similar products from Siniat

Siniat GTEC Thermal PIR Board

Siniat GTEC Thermal PIR Board