Commercial Roof Waterproofing in Waterford — GacoFlex S42 Silicone Roof Coating

Waterford City grew along the River Suir, and its commercial roofs reflect that history: older quayside and city-centre buildings, factory and warehouse roofs on the industrial estates, and the storage sheds serving the Port of Waterford at Belview, eight kilometres downstream and able to take bulk vessels of around 32,000 dwt. Among the city’s manufacturers, Bausch + Lomb has made contact lenses in Waterford for more than 40 years. Big production and distribution buildings like these usually have extensive flat or low-pitched roofs, where a single failure can interrupt work. The quays along the Suir also hold older stone and brick buildings with flat sections and parapet gutters hidden behind the facade.

Our verified sources contain no published 1991–2020 station average for Waterford, so no rainfall figure is quoted here. Whatever the annual total, flat roofs fail in familiar ways: water ponds where decks have deflected or outlets are blocked, membranes crack and blister with age, and flashings around plant, rooflights and upstands come loose. On profiled metal roofs, corrosion at the cut edges of sheet ends is a very common source of leaks. Plant rooms, extraction fans and ductwork added over the years each break through the covering, and poorly sealed penetrations are frequent leak points.

Liquid-applied GacoFlex S42 silicone gives a seamless new waterproofing layer over the existing roof once it has been cleaned and repaired, and it is formulated for low-slope roofs that hold water. SF42 adds built-in fibre reinforcement for detail-heavy roofs. Because the coating goes over the existing covering, a factory or warehouse can usually keep operating underneath, with the approved installer working in phases. The two-coat S42 system carries a 20-year manufacturer-backed product warranty. Duratite supplies the materials; an approved installer covering Waterford does the work. Adhesion tests on the existing covering come first, and any saturated insulation is cut out and replaced so moisture is not trapped beneath the new membrane.

Waterford City & County Council is the building control authority. If insulation is being added or replaced during the works, TGD L 2022 sets the benchmark for existing non-domestic buildings — an average U-value of 0.25 W/m²K for a flat roof undergoing material alteration. All roof work is subject to Health and Safety Authority requirements, including edge protection and guarding around fragile rooflights on older units. The coatings are cold-applied, so no naked flame is needed on the roof, which simplifies fire-safety planning on occupied sites.

Waterford's industrial roofs range from manufacturing plants to port stores eight kilometres downriver at Belview, and the practical side of a coating project differs between them. On a large manufacturing site, such as the contact-lens plant that has operated in the city for decades, the roof sits over controlled production space, so preventing any water or debris from reaching the area below is the central concern. Planning revolves around the site's permits, access rules and production schedule. At Belview, stores for bulk cargo are wide and exposed, and work may need to fit around vessel arrivals and cargo movements in the yard. For older buildings along the Suir quays, the challenge is often reaching the roof at all, with narrow streets, parapets and limited space for access equipment. Before arranging a survey, gather what exists: drawings, records of the existing covering and its repairs, and notes of leaks with dates and positions. Photos of ponding after rain are useful, as are details of any plant, extraction fans or solar arrays on the roof. Confirm who manages access to the site and whether contractors need passes or inductions. The approved installer will then test adhesion, check for wet insulation and plan the job in sections, so that each part of the roof is left weathertight at the end of the day. Duratite supplies the Gaco silicone and links Waterford building owners with an approved installer, who carries the job through from survey to completion.