
Encapsulated roof
Completed white coating on an asbestos cement roof at SAICA, Warrenpoint, County Down.
- Sheets left in place
- Northern Ireland project
Keep ageing asbestos cement roofs in County Tyrone in place, sealed and watertight with the GacoFlex asbestos roof system. Asbestos cement roofs are common on agricultural and industrial buildings across County Tyrone. Encapsulation is a survey-led way to deal with weathered sheets: they are prepared, sealed with GacoFlex encapsulation coatings and made watertight, without removal.

County Tyrone is Northern Ireland’s largest county, stretching from the Sperrin Mountains — whose highest peak, Sawel, stands at 678 m — to the farmland and towns around Dungannon, Cookstown and Omagh. Dungannon is a real industrial centre. Dunbia, founded there in 1976 as Dungannon Meats and now part of Dawn Meats, has its headquarters in the town, and Powerscreen, maker of mobile crushing, screening and conveying equipment for quarrying and recycling, has its global headquarters on the Coalisland Road. Farm sheds, agri-food premises and engineering works can all still include older corrugated asbestos cement roofs.
There is no published long-term rainfall average for a Tyrone station in our verified sources, so this page doesn’t give a figure. Anyone farming on the slopes of the Sperrins knows the weather well enough; the more useful question is the state of the roof. Weathered sheets lose their smooth finish, turn dark with moss and lichen, and start cracking around fixings. Water then gets into sheds holding livestock, feed or machinery, and corrodes whatever sits below. Upland farms on the Sperrins face more exposure than sheds in the lowland valleys, so ridge and verge sheets there may show the worst wear.
Gaco U91 and U92 urethane coatings are used to encapsulate asbestos cement roofs. Once the roof is prepared, the coating locks in the weathered surface and forms a continuous waterproof layer across sheets, laps and fixings. The approved installer surveys the roof, identifies broken sheets for replacement and plans cleaning so the cement isn’t abraded. The programme is set by dry-weather windows and surface conditions under Gaco’s guidance. Duratite supplies the coating system and routes Tyrone enquiries to an approved installer. Meat-processing and food premises have strict hygiene rules, so the installer agrees how the space below will be protected during preparation and coating.
In Northern Ireland the Control of Asbestos Regulations (Northern Ireland) 2012 apply, enforced by HSENI, which requires a licence for licensable asbestos work. Fragile-roof safety matters just as much on farm and factory sheds. Building control in Tyrone is split between three councils: Mid Ulster District Council for east Tyrone, including Dungannon and Cookstown; Fermanagh and Omagh District Council for the west; and Derry City & Strabane District Council around Strabane. Where energy upgrades form part of a roof project, the Building Regulations (Northern Ireland) 2012 apply. Keep the survey and a record of the work with your asbestos management plan.
It depends on roof area, condition, access and the specification, so we do not publish prices. After the free survey you receive a written quotation in sterling from the approved installer.
Removal needs specialist contractors, disposal and a replacement roof. Encapsulation leaves the sheets in place.
Livestock sheds, stores and production buildings cannot easily be emptied for a roof replacement.
Hairline cracks, failed laps and fixings let water in. The coating system bridges and seals them across the whole roof.
Older sheets lose their surface, grow moss and lichen and become porous. Encapsulation seals that weathered surface.
A Northern Ireland project, photographed on site. The SAICA Warrenpoint roofs combined closed-cell roofing foam with a GacoFlex U91 base coat; the build-up for each roof in County Tyrone is set at survey.

Completed white coating on an asbestos cement roof at SAICA, Warrenpoint, County Down.

SAICA, Warrenpoint, County Down: closed-cell roofing foam spray-applied from the walkway system over asbestos cement (Northern Ireland project).

GacoFlex U91 base coat applied over the cured foam at SAICA, Warrenpoint.
Work with asbestos in Northern Ireland is governed by the Control of Asbestos Regulations (Northern Ireland) 2012, enforced by HSENI.
Every project is survey-led, with a risk assessment and plan of work prepared before the installer starts on your County Tyrone roof.
Because the sheets stay in place, they remain part of the building’s asbestos records after the work in County Tyrone.
Straight answers to the questions building owners and managers ask most often.
Yes. Duratite Ireland takes enquiries from County Tyrone and routes them to an approved installer of the GacoFlex asbestos roof system who covers County Tyrone. We do not have a branch office in County Tyrone; the survey and application are carried out by the approved installer.
Allow for the survey, the specification, the risk assessment and plan of work, and any notification to HSENI that the work requires. The installer plans the programme around it.
No. Encapsulation seals the asbestos cement sheets and makes the roof watertight, but the sheets stay in place, so they remain part of the building’s asbestos records.
In Northern Ireland, the Control of Asbestos Regulations (Northern Ireland) 2012, enforced by HSENI. Every project is survey-led, with a risk assessment and plan of work in place before work starts.
It depends on roof area, condition, access and the specification, so we do not publish prices. After the free survey you receive a written quotation in sterling from the approved installer.
Often, yes, because the work is carried out on the roof with the sheets left in place. The installer’s risk assessment sets out any restrictions for your building.
If the survey finds the sheets structurally sound, yes. The roof is prepared, sealed with GacoFlex U91 and U92 encapsulation coatings and, where specified, finished with a GacoFlex silicone topcoat. The sheets stay in place, so there is no removal or disposal.
It depends where the site is. Mid Ulster District Council covers east Tyrone, including Dungannon and Cookstown. Fermanagh and Omagh District Council covers west Tyrone, including Omagh. Derry City & Strabane District Council covers Strabane and the north-west of the county. Asbestos rules are the same throughout: the Control of Asbestos Regulations (Northern Ireland) 2012, enforced by HSENI.
It is rarely practical. Short days, low temperatures and frequent rain make it hard to get a dry roof and conditions within Gaco’s application limits for long enough to apply and cure the coating. Installers normally schedule upland farm roofs for the drier, milder months and plan preparation work so the coating can go on as soon as a window opens.
The licence, where one is needed, is held by the contractor, not the building owner. Whether the work is licensable depends on how it is assessed under the Control of Asbestos Regulations (Northern Ireland) 2012. As the owner of a non-domestic building, you have a duty to manage asbestos, so keep a record of the survey and the work done.
The GacoFlex asbestos roof system, how encapsulation works and every area we cover.
Spray foam insulation, surveyed and installed by approved installers.
Commercial roof waterproofing, surveyed and installed by approved installers.
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What the 2025 amendment means for roof owners, and the Northern Ireland rules.
Condition, management options and the rules that apply before any roof work starts.
Asbestos cement roofs encapsulated in place at an industrial plant in Warrenpoint, County Down.
Every county in Ireland and Northern Ireland.
Tell us about your building and we’ll recommend the right system — foam, waterproofing or both — surveyed, specified and quoted at no cost.