Design - Damp Protection

The Sublime® floor does not require a damp proof membrane, the damp protection is provided by the non-capillary properties of the Glapor foamed glass. Due to the surface texture of the foamed glass the moisture is not able to wick up through the granules, which means that with the minimum depth of 150mm foamed glass, moisture remains in the sub soil and does not transfer through to the slab above.

This is one of the key benefits of the Sublime® floor system as the use of a DPM in a solid walled building can lead to increased moisture in the base of the walls, often referred to as “rising damp” and while the membrane will keep the floor dry it increases the risk to the walls leading to deterioration of the masonry and risk of mould.

Whilst the Glapor prevents the transfer of moisture through capillary action providing damp protection it does not resist the movement of ground water, if the water table level is higher than the floor excavation depth then please contact our technical team for additional support.  

See Also: Design – Do I need a damp proof membrane?