Waterproof Membrane, Reservoir Roof, Kilkenny

Project Overview

AQL was engaged to apply a waterproof membrane system to the roof of a water reservoir in a water treatment plant in County Kilkenny. This system was needed to waterproof the roof, allow movement and protect the concrete. In addition, there was an uneven concrete finish on the roof, with suspected lack of cover for the rebar. Therefore, a membrane system was warranted to ensure a suitable finish was left.

client objectives

Apply a waterproof coating to protect the structure Allow for roof drainage on the roof and protection for membrane The roof should be aesthetically pleasing The membrane should allow for movement and settlement of the reservoir

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Scope of works

AQL carried out a restoration and protection measures, including: Surface Preparation: Loose, delaminated was removed using diamond grinding. This was followed by high pressure washing to clean the roof area. Primer- A bonding primer was then applied to the roof to allow for an optimal host surface. Waterproof Membrane- A self-adhesive waterproofing membrane was then installed on the roof to protect the concrete and seal the roof of the tank. The membrane was overlapped and install to the manufacturers guidelines to ensure no future leaks. Edge Detail- The edge of the roof, around manholes and vents were then sealed up with a specific edge detail. Protection- Sheet drainage was then installed over the entire roof to protect the membrane while still allowing water to drain off the roof. Decorative Stone- 12 tonnes of decorative stone was then placed on the roof for an astheically pleasing finish, while also weighing down the sheet drainage.

Challenges

Material Access- To allow for the stone to be placed on the roof, a teleporter was needed to lift it on. Surface Contaminants & Deterioration: The presence of accumulated grime, biofilm, and pollutants on concrete surfaces necessitated thorough mechanical preparation before coatings and repairs could be applied. Structural Movement- Due to the nature of the structure, there is a certain element of movement within the tank. If a rigid coating was used it would crack, allowing water to enter. For this reason, a flexible membrane was used to allow for this movement.

Results

Structural Longevity: The membrane acts as a water proofer, as well as a protective measure, which significantly enhanced the lifespan of the concrete, ensuring long-term durability. Improved Aesthetic & Functional Integrity: The installation of decorative stone allows the roof to be aesthetically pleasing, while also being functional helping with the drainage system

Conclusion

The successful completion of this waterproofing project highlights AQL’s expertise in waterproofing across all sectors, including the drinking water industry. Through meticulous planning, industry-leading materials, and specialist application techniques, AQL delivered a high-quality, long-lasting solution that ensures the tank remains operational, waterproofed and protected for years to come.