Upgrade your home to an A-rated thermal standard with the NSAI-certified Baumit external wall insulation system. Our own full-time installation crews handle your complete retrofit with up to €8,000 in SEAI grants deducted straight from your invoice.
Detached Home EWI Retrofit
Baumit SilikonTop Render & Bespoke Sills by Cills.ie
We specialize in the building thermal envelope. We wrap existing solid and hollow block homes in Dublin and Leinster, and we build structural Insulated Concrete Form walls for new builds.
We mechanically fix and adhesive-bond 100mm to 150mm of NSAI-certified Baumit EPS or breathable mineral wool to your exterior walls. We embed high-tensile fibreglass reinforcing mesh, apply a breathable Baumit SilikonTop silicone render, fit custom aluminium sills from Cills.ie, and unclip all exterior services.
When building a new one-off home or high-performance extension, ICF replaces standard blockwork. We read your structural engineer's drawings, stack interlocking EPS forms (Castleforms, Amvic, Nudura, Logix, Quad-Lock, Fox Blocks, Beco), place specified structural rebar, and execute the concrete pour.
Castleforms ICF System
Amvic ICF SystemEvery project is surveyed, wrapped with certified Baumit graphite EPS, finished with self-cleaning silicone render, and fitted with bespoke aluminium window sills from our Inchicore workshop.
Solid Block Semi-Detached House
System: Baumit ProSystem 100mm Graphite EPS
Finish: Baumit SilikonTop 1.5mm Silicone Render (Chalk White)
Sill Detail: Bespoke Aluminium Sills by Cills.ie
BER Upgrade: E2 (340 kWh/m²/yr) → B1 (84 kWh/m²/yr)
Recently completed 100mm external wall insulation wrap on solid block home in Dublin 5. Thermal bridging eliminated, coastal weather protection with Baumit SilikonTop, and custom aluminium window sills fabricated by Cills.ie.
4-Bed Semi-Detached Home
System: Baumit ProSystem 120mm Graphite EPS
Finish: Baumit SilikonTop 1.5mm (Chalk White 0019)
Sill Detail: Bespoke RAL 7016 Anthracite Sills by Cills.ie
BER Upgrade: E1 (324 kWh/m²/yr) → B1 (88 kWh/m²/yr)
Solid concrete block gable and front facade wrapped. Cold draughts and bedroom condensation eliminated; heating demand reduced by 44%.
Solid Block Terraced House
System: Baumit ProSystem 100mm Graphite EPS
Finish: Baumit SilikonTop Self-Cleaning Silicone Render
Sill Detail: Bespoke Aluminium Sills by Cills.ie
BER Upgrade: F (395 kWh/m²/yr) → B1 (86 kWh/m²/yr)
Recently completed external wall insulation on a solid block terrace house. Front and rear facades fully wrapped, party wall junctions sealed, and custom Cills.ie aluminium window sills installed.
Solid Wall Retrofit & Brick Slip Finish
System: External Wall Insulation + Brick Slip Finish
Finish: Architectural Brick Finish & Pointing
Sill Detail: Bespoke Aluminium Cills by Cills.ie
BER Upgrade: F (385 kWh/m²/yr) → A3 (72 kWh/m²/yr)
Recently completed project featuring an authentic brick finish over external wall insulation, paired with custom powder-coated aluminium window cills from Cills.ie for flawless water drainage.
4-Bed Detached House
System: Baumit OpenSystem Breathable Mineral Wrap
Finish: Baumit SilikonTop 1.5mm (Oatmeal Cream 0244)
Sill Detail: Heavy-Duty Powder-Coated Sills by Cills.ie
BER Upgrade: D1 (250 kWh/m²/yr) → A3 (65 kWh/m²/yr)
Four exposed facades wrapped without interior disruption. Large building envelope completely transformed into an energy-efficient home.
Most Irish homes built before 2011 already have basic fiberglass in the attic. However, up to 45% of total household heat loss occurs directly through uninsulated 9-inch hollow block or solid concrete masonry walls.
When cold outer masonry drops the internal wall temperature below the dew point, indoor humidity condenses into moisture, causing drafts, mould behind wardrobes, and cold rooms. Wrapping the exterior with a breathable Baumit insulation system keeps the structural walls warm, shifts the dew point outward, permanently stops condensation, and transforms cold D/E rated houses into warm A/B rated homes.
Direct execution by our in-house certified installation crews across Dublin, Kildare, Meath, Wicklow, and Louth.
We physically survey your walls, check block condition, measure window reveal depths, inspect damp proof courses, and calculate ventilation requirements.
We submit your pre-works grant application to SEAI before tools touch site. This locks in your €3,000 to €8,000 grant approval for direct invoice deduction.
We erect safe perimeter scaffolding, protect windows and paths with heavy-duty film, and prepare wall surfaces for mechanical adhesive bonding.
100mm to 150mm high-density Baumit EPS boards are bonded with polymer adhesive and anchored with approved thermal-break insulation fixings.
High-tensile alkali-resistant fibreglass mesh is fully embedded into a flexible polymer basecoat with diagonal stress patches at all window corners.
We apply a Baumit SilikonTop self-cleaning silicone topcoat render in your chosen RAL colour, creating a watertight, UV-stable, breathable finish.
Custom-fabricated powder-coated aluminium window sills with welded end-caps are installed from our Inchicore workshop to prevent water tracking.
External gas meter boxes, ESB brackets, and vents are remounted on certified standoffs. We arrange the post-works BER assessment and submit all paperwork.
Isotherm is an SEAI Registered Contractor. We process your grant application and deduct the grant value directly from your invoice.
We operate across Dublin and the Leinster commuter belt. Our project managers and site supervisors visit active jobs daily.
Inchicore, Crumlin, Drimnagh, Ballyfermot, Lucan, Clondalkin, Tallaght, Dundrum, Rathfarnham, Clontarf, Swords, and Dún Laoghaire.
Naas, Newbridge, Celbridge, Maynooth, Leixlip, Straffan, Kilcock, Sallins, and Clane.
Dunboyne, Ashbourne, Ratoath, Dunshaughlin, Trim, Navan, and Kells.
Bray, Greystones, Delgany, Kilcoole, Newtownmountkennedy, Wicklow Town, and Arklow.
Drogheda, Dundalk, Ardee, Clogherhead, Dunleer, and Termonfeckin.
Contact our technical desk to discuss commercial or large residential ICF projects.
Contact Technical Desk →The difference between an amateur job and a certified contractor is how window sills, meter boxes, and eaves are detailed.
Original concrete sills become thermal bridges when insulation is added. Our sister workshop, Cills.ie, custom-presses powder-coated aluminium sills with welded watertight end-caps in our Inchicore yard.
Gas meter boxes and ESB cable brackets are unclipped and mounted onto certified standoff extension brackets. We never bury gas valves or cover service access panels.
Room ventilation and subfloor crawlspace airflow are preserved using rigid sleeve extensions through the Baumit insulation, preventing moisture entrapment under suspended timber floors.
A standard 3-bedroom semi-detached house in Dublin or Kildare typically costs between €13,000 and €19,000 before grants, depending on wall square meterage, insulation thickness (100mm to 150mm Baumit EPS or mineral wool), window reveal details, and pipework. With the €6,000 SEAI grant deducted directly from your invoice by Isotherm, the net out-of-pocket investment is typically between €7,000 and €13,000. Mid-terrace homes range from €10,500 to €14,000 before the €3,500 SEAI grant deduction (net €7,000 to €10,500), while detached houses range from €18,000 to €26,000 before the €8,000 grant. Apartments range from €7,000 to €11,000 before the €3,000 grant. We provide fixed-price quotations following an on-site physical survey.
In 2026, the SEAI Better Energy Homes grant provides €8,000 for detached houses, €6,000 for semi-detached and end-of-terrace homes, €3,500 for mid-terrace houses, and €3,000 for apartments. To qualify, your property must have been built and occupied on or before 31 December 2010. From 2 March 2026, under the second wall measure, homes that previously received a cavity or internal wall insulation grant can also claim the EWI grant. As an SEAI registered contractor, Isotherm processes your grant application and deducts the grant amount directly from your final invoice.
We primarily install NSAI-certified Baumit external wall insulation systems (such as Baumit openSystem and Baumit EPS with breathable SilikonTop or NanoporTop silicone render). Baumit systems are specifically formulated for Ireland's wet maritime climate, offering exceptional vapour permeability, crack resistance, self-cleaning silicone surfaces, and high algae resistance. We also install Sto systems upon specific architectural request.
Yes, this is an essential part of a professional house wrap. When adding 100mm to 150mm of external insulation, existing concrete window sills lose their projection. Our sister workshop, Cills.ie (located in the same Inchicore yard), custom-fabricates bespoke powder-coated aluminium window sills with welded end-caps that sit over the new insulation. For services, we unclip your external gas meter box and ESB meter brackets, install certified standoff extension brackets, and remount them securely onto the finished render. We never bury meter boxes behind insulation.
A standard 3-bedroom semi-detached house wrap takes approximately 2 to 3 weeks on site from scaffolding erection to final Baumit render application. The timeline depends on weather conditions, as breathable basecoats and silicone topcoats require dry days above 5°C to cure properly. We plan our work around verified weather windows to ensure structural mesh embedment and render finishes bond permanently.
No, you do not need to move out. 100% of external wall insulation and rendering work is carried out from the outside of your property using scaffolding. There is zero dust, mess, or disruption inside your living areas, and you lose zero internal floor space. Your heating, electricity, and plumbing remain fully operational throughout the entire installation process.
ICF stands for Insulated Concrete Forms. It is a modern method of construction where lightweight, interlocking expanded polystyrene (EPS) hollow forms are dry-stacked on site and filled with reinforced ready-mix concrete. We build structural ICF shells across Dublin and Leinster to your engineer's drawings, including Amvic, Nudura, Logix, Quad-Lock, Fox Blocks, and Castleforms.
We operate dedicated in-house installation crews covering County Dublin (Inchicore base, Lucan, Crumlin, Tallaght, Dundrum, Swords, Dún Laoghaire), County Kildare (Naas, Newbridge, Celbridge, Maynooth, Leixlip, Straffan, Kilcock), County Meath (Dunboyne, Ashbourne, Ratoath, Trim, Navan), County Wicklow (Bray, Greystones, Delgany, Arklow), and County Louth (Drogheda, Dundalk). We do not sub-contract to third parties, allowing our site supervisors to physically inspect and manage every active job.
Isotherm is a specialized direct contracting firm based at Unit 20, Westlink Industrial Estate, Kylemore Road, Inchicore, Dublin 10, D10 TD35. We survey, we install NSAI-certified Baumit external wall insulation systems, we build Insulated Concrete Form (ICF) structures, and we process your SEAI grant paperwork directly.
We operate our own in-house installation crews across Dublin, Kildare, Meath, Wicklow, and Louth. Our sister workshop in the same Inchicore yard, Cills.ie, custom-fabricates the powder-coated aluminium window sills required for every home we wrap.
Schedule an on-site physical survey in Dublin, Kildare, Meath, Wicklow, or Louth. We calculate your exact SEAI grant and provide a fixed-price quotation.