Gaco Asbestos Roof Waterproofing in Letterkenny — Encapsulation Without Removal

Letterkenny is Donegal’s largest town, with 22,549 people at Census 2022, and Donegal County Council administers it through the Letterkenny-Milford Municipal District. The county’s other districts, Donegal, Glenties, Inishowen and Lifford-Stranorlar, cover a large and varied territory, and Letterkenny acts as a service centre for much of it. That gives the town a mix of roofs: commercial and retail premises, workshops and stores in town, and farm buildings on the land around it.

Teagasc covers Letterkenny through its Sligo, Leitrim and Donegal advisory region, which supports around 3,800 farmer clients across dairying, cattle, sheep and tillage, and even goats, with a dedicated forestry advisory service as well. Farms of that range need a range of buildings: dairies and cubicle houses, cattle and sheep sheds, grain and machinery stores. Many older ones in Donegal, as elsewhere in Ireland, were roofed with corrugated asbestos cement, and those sheets are now well into their working life.

Donegal’s weather is hard on roofs. Met Éireann’s Malin Head station, the nearest with a full 1991 to 2020 normals record, averaged 1,138.1 mm of rain a year and recorded 1 mm or more on about 190 days. On a north-western roof that means wet sheets for much of the year, with moss, lichen, softened cement and corroded fixings the result. Encapsulation seals the roof where it stands. Gaco urethane coatings, U91 and U92 being the grades used on asbestos cement, are applied over the existing sheets, so a shed, store or workshop keeps its roof throughout. An approved installer surveys, replaces broken sheets, removes growth without abrading the cement and coats only when the roof is dry and conditions are within Gaco’s limits, which in Donegal means watching for weather windows. Duratite supplies the materials and the approved installer carries out the work.

Work that could disturb asbestos cement in Letterkenny is covered by the Safety, Health and Welfare at Work (Exposure to Asbestos) Regulations 2006 (S.I. No. 386 of 2006, as amended), enforced by the Health and Safety Authority. The installer’s risk assessment settles notification, safe access to fragile sheets and control of debris. Donegal County Council is the building control authority, and TGD L 2022 applies where insulation is changed. The island-of-Ireland reference project for asbestos cement roof encapsulation is SAICA Warrenpoint, Co. Down.

For a Letterkenny enquiry, tell us whether the roof is on a town premises or a farm, how exposed the site is, and what is kept underneath. Because Donegal weather sets the pace, mentioning any deadline early helps the installer plan survey, repairs and coating in the right order.