GTEC Thermal K Board

GTEC Thermal K Board

A board in which provides thermal resistance & ideal when space is crucial.

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Quick Guide


GTEC Standard Board laminated to phenolic foam to create our top performing product which offers a 780% improvement in insulation over standard plasterboard,  Ideal when space is crucial. Superior performance from a thinner boards compared to XP and GTEC Standard Thermal Board.


Aerated Calcium sulphate di-hydrate enclosed inside a tough paper with bound edges. Core and papers are bonded with starch. Edge glue is PVA. Phenol formaldehyde foam (PF) is factory bonded to this 9.5 mm board with various thicknesses of this rigid foam using PVA adhesive.


GTEC Thermal K Board can be jointed and finished with GTEC Jointing Systems. The boards require priming with GTEC Universal Sealer prior to decorating.

Sizes Available:

Tapered Edge (mm)
30 x 1200 x 2400
40 x 1200 x 2400
50 x 1200 x 2400
60 x 1200 x 2400
70 x 1200 x 2400




Siniat, formerly Lafarge Plasterboard, is one of the UK and Ireland's leading plasterboard producers with factories in Ferrybridge and Bristol.