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Get ListedProfessional drylining insulation is one of the most effective ways to improve the energy efficiency of homes in Ireland. Also known as internal wall insulation, drylining involves attaching insulated plasterboard sheets directly to the interior face of external walls. This method is popular for solid brick or stone walls that cannot accept cavity wall insulation, keeping heat inside and reducing carbon emissions. Vetted contractors ensure your internal insulation is installed correctly to prevent cold drafts.
Drylining insulation works by creating a thermal barrier on the inside of your home. Contractors use high-performance dry lining insulation boards that combine gypsum plasterboard with a backing of rigid foam insulation, such as PIR or phenolic foam. These boards are fixed to the walls using either the dot-and-dab adhesive method or by mechanical fixing onto timber or metal studs, providing a clean surface ready for skimming. Creating a continuous thermal layer is key to maximizing energy retention. Experienced installers pay close attention to structural slab joints to avoid temperature leaks.
Selecting dry lining walls with insulation is a popular choice for older Irish terrace homes and stone cottages that lack cavity spaces. Since the insulation is installed internally, it does not alter the external appearance of the building, making it suitable for properties in conservation areas. Professional installation ensures that thermal bridges around windows and floors are eliminated.
The thickness of the insulated plasterboard is a key decision during the design stage. Standard boards range from 25mm to 80mm in thickness. Installing insulated plasterboard 25mm is common in small rooms where space preservation is critical, as thicker boards will reduce the overall floor area of the room. Contractors calculate the required U-value to determine the optimum thickness for your heating goals.
Additionally, drylining plasterboard includes an integrated vapor barrier. This foil backing prevents warm, moist indoor air from passing through the insulation and condensing on the cold external masonry wall. Condensation control is vital for preventing dampness, structural rot, and black mould growth behind the plasterboards, keeping your indoor air clean and healthy for your family.
The cost of hiring professional drylining contractors in Ireland depends on the thickness of the boards, the room layout, and the preparation required. For a single bedroom, drylining cost ranges from 800 to 1,500 euro. Dry lining a full three-bedroom semi-detached house internally typically costs between 4,000 and 7,500 euro, reflecting the labor involved. Many contractors offer flexible payment stages to help homeowners manage the cashflow during larger deep retrofit jobs.
This price usually includes fitting the boards, joint taping, skimming, and extending electrical sockets and pipework to sit flush with the new walls. While internal dry lining is a significant investment, it is eligible for SEAI individual energy upgrade grants. These grants can cover up to 1,500 euro or more of the cost, making the project far more affordable for homeowners.
When hiring a drylining contractor, you should verify that they hold valid public liability insurance and are registered with the SEAI if you plan to apply for energy grants. It is also wise to ask if they hold NSAI certification for internal wall insulation. Qualified contractors will provide references and show pictures of previous installations, confirming their expertise. Vetted specialists are registered with safety bodies and keep up to date with the latest technical specifications. They will inspect your walls to advise you on the most suitable insulation materials.
Read customer reviews to confirm they complete the work neatly and clean up the dust generated during plasterboard cutting. Secure a detailed written quote that outlines the thickness of the insulation, the fixing method, and whether skimming and electrical adjustments are included. Vetted contractors will handle the grant paperwork, ensuring a hassle-free home upgrade.
The disadvantages of dry lining include a slight reduction in the internal floor space of the room, as the insulated boards can add 50mm to 100mm to the wall depth. It also requires removing and refitting baseboards, radiators, and electrical sockets, and can cause damp issues if installed without a proper vapor barrier.
Drylining insulation generally costs between 800 and 1,500 euro per room, or 4,000 to 7,500 euro for a full semi-detached house. Total costs depend on the insulation thickness, the room layout, and whether electrical and plumbing relocations are needed. SEAI grants are available to reduce this cost.
Insulated plasterboard thickness typically ranges from 25mm to 80mm. Standard installations use 50mm or 62.5mm boards to balance heat retention with minimal loss of room space. In very small rooms, a 25mm board is preferred to maintain the room dimensions.
No, you must never install dry lining directly over damp walls. The source of the dampness, whether rising damp, rainwater penetration, or pipe leaks, must be fully resolved and the walls allowed to dry completely before drylining begins, otherwise the damp will rot the plasterboard.
Yes, the Sustainable Energy Authority of Ireland (SEAI) provides grants for internal wall insulation. Homeowners can receive grants ranging from 1,500 euro for mid-terrace houses to 4,500 euro for detached homes, provided the work is completed by an SEAI registered contractor.