TACKLING DAMP AND IMPROVING THERMAL PERFORMANCE


Left: Diathonite Evolution was floated


Right: The Diasen system enabled the cottage to keep its characteristics


Left: Diathonite Evolution was spray applied internally


Right: The walls were finished with a natural paint


the level of the slab to 500mm above the top line of the tanking system in a 25mm spray applied layer. Watstop is essential in this case because it is below ground level to optimise the performance of Diathonite Deumix+ and the robustness of the whole system. Watstop creates a buffer by preventing Diathonite Deumix+ from being saturated if large amounts of moisture penetrate the wall, hence ensuring the capillary action of the Diathonite Deumix+ is maximised.”


The Diathonite Evolution was spray-applied in two 25mm layers and this was then floated by hand to provide a smooth internal wall surface, following the contours of the original walls.


Once the Diathonite plaster was fully dried 10–11 days later, a breathable lime based finishing render was applied directly onto the plaster in two coats. Developed by Diasen specifically for use with Diathonite plaster, Argacem HP has a macroporous structure, which improves the dehumidifying


106 Listed Heritage Magazine September/October 2018


properties of the plaster, supporting the building’s hygrometric balance while helping to eliminate mould thanks to the antibacterial action of lime.


EXTERNAL UPGRADE Externally, stripping back the mouldy and discoloured render revealed rubble sandstone which was cleaned to remove any loose particles. The naturally rough surface provided an ideal key for application of the plaster. For the timber lintels and window surrounds, however, Diasen Aquabond was used to aid adhesion of the Diathonite Evolution.


The Diathonite Evolution was hand-applied to the external walls, with the grey of the wet thermal plaster gradually turning to white as each surface dried.


Once dried, the hand-applied Diathonite Evolution provided a smooth surface for the application of Diasen D20, a water-based paint primer for use on the plaster. The external


For further information contact Penny Randell, Ecological Building Systems, email info@ecologicalbuildingsystems.com www.ecologicalbuildingsystems.com


walls were then finished with Diathonite Cork Render sprayed by hopper, a diffusion open finishing coat that provides both water repellent and anti-fungal protection to the newly plastered walls. This enabled a clean, white finish in keeping with the location and original aesthetic of the building.


COMPLETE COMFORT Glen Cottage is now completed and available to rent for those looking for a coastal retreat that combines authentic charm and a creative past with a warm, dry, quiet and damp-free interior.


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