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SUNDOLITT receive BBA certification for extruded polystyrene inverted roof insulation board

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SUNDOLITT insulation board

SUNDOLITT’S extruded polystyrene (XPS) 300 Inverted Roof Insulation Board has been awarded BBA certification.

The insulation board is suitable for the inverted roof concept (above roof waterproofing) on new or existing domestic and commercial trafficked flat roofs, and balconies and terraced roofs subject to pedestrian access.

The high thermal performance insulation board is overlaid with Sundolitt’s WRL (water-flow reducing layer) membrane, with a gravel ballast or paving slab finish applied on top, which ensures that the insulation system is warrantied for the lifetime of the building.

Sundolitt XPS off rs exceptionally low moisture absorption through its closed-cell system, which helps maintain excellent thermal performance in wet environments such as inverted roofs. Its strength and stability is unaffected even by water absorption, immersion
and diffusion.

Colin Morrow, Sundolitt’s General Manager, said: “We are delighted that our XPS 300 inverted Roof Insulation Board has been awarded BBA certification following rigorous testing.

This is the second product in recent months to be accredited and is part of our drive to ensure we manufacture and supply proven, high-performance insulation products to the construction industry.

Inverted roofs are cost-effective solutions and cost savings can be made by installing Sundolitt XPS Inverted Roof Insulation board over the weatherproofing. Insulating over the weatherproofing prolongs the life and reduces maintenance of the membrane by reducing stresses caused by temperature extremes and UV exposure.

For further information, please visit or call 0191 438 1023.

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