External Wall Insulation in Navan, Co. Meath
Protect your Navan home from cold weather, damp walls, and rising energy bills. Our own skilled crews wrap your home with NSAI-certified Baumit external insulation and custom-fabricated aluminium sills by Cills.ie, making your home significantly warmer — with up to €8,000 in SEAI grants deducted straight from your invoice.
Navan External Wall Insulation & SEAI Grants
Projects typically start from €180 to €220. Isotherm deducts the SEAI grant directly from your invoice at source.
For homes subject to heavy exposure, we apply specialized silicone-based acrylic renders (such as Baumit SilikonTop) to provide exceptional rain repellency, algae protection, and vapor breathability.
For window cills where water runoff is high, we fit bespoke aluminium over-sills manufactured with a special protective powder coating from Cills.ie to guarantee 100% watertight drainage and long-term durability.
*Starting figures vary depending on project extras, architectural detailing, finish selection, silicone-based acrylic render requirements, and special powder coating for window cills. Fixed quotation provided after a free on-site survey.
Insulating Navan Estates & Suburbs
From mature hollow block estates along the Boyne to modern commuter developments in South Navan, we specify custom insulation profiles.
Estates like Silverlawns, Blackcastle, and Beechmount feature uninsulated 215mm hollow concrete block walls. Wrapping exterior blockwork with Baumit graphite EPS eliminates cold bridging and mould growth completely.
Developments in Johnstown Wood, Bailis Downs, and Athlumney have partial cavity insulation. External insulation encases exposed gables and window reveals, cutting heat loss and boosting BER ratings to A-grade.
Homes on the Trim Road, Kingscourt Road, and Slane Road feature substantial exposed wall areas. Our high-density Baumit wrap stops winter chill and wind driving into the masonry, saving €1,500+ annually on heating bills.
Real project photos across Navan
Every home is surveyed, scaffolded, wrapped with certified Baumit graphite EPS, and completed with custom aluminium window sills by our own direct crews.
Johnstown Wood & Bothar Sion, Navan
1990s 3-Bed Semi-Detached House
System: Baumit ProSystem 100mm Graphite EPS (λ 0.031)
Finish: Baumit NanoporTop Self-Cleaning Silicone (Pebble Grey 0876)
Sill Detail: Custom aluminium window over-sills with welded end caps by Cills.ie
BER Upgrade: D2 (292 kWh/m²/yr) → A3 (68 kWh/m²/yr with Attic Upgrade)
Solid block gable and front elevation wrapped. Cold bridging eliminated across master bedroom wall, gas heating runtime cut by 44%.
Blackcastle & Silverlawns, Navan
1970s 4-Bed End-of-Terrace 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: E2 (350 kWh/m²/yr) → B1 (88 kWh/m²/yr)
Hollow concrete block envelope wrapped with high-impact mesh basecoat. Exposed north-facing gable cured of internal dampness.
Trim Road / Beaufort Grange, Navan
1980s 4-Bed Detached Residence
System: Baumit OpenSystem Breathable Mineral Composite Wrap
Finish: Baumit SilikonTop 1.5mm Texture (Oatmeal Cream 0244)
Sill Detail: Aluminium sills fabricated by Cills.ie in RAL 9005 Jet Black
BER Upgrade: D1 (255 kWh/m²/yr) → B1 (82 kWh/m²/yr)
Four exterior elevations fully insulated. Standoff brackets fitted for outdoor lighting and rainwater downpipes.
Baumit, Sto & Weber external insulation systems
We install full NSAI-certified external wall insulation systems engineered for Irish weather conditions.
Our primary system for Navan homes. High-density graphite EPS (λ = 0.031) or breathable openTherm mineral boards, finished with self-cleaning Baumit SilikonTop silicone render that resists algae and dirt.
Cement-free, highly flexible external wall insulation system with outstanding impact resistance (up to 15 Joules) and self-cleaning Lotus-Effect silicone facade finishes for high-exposure rural properties.
NSAI-approved mineral wool and EPS insulation systems suitable for solid concrete block, stone cottages, and modern blockwork with breathable, weather-tight silicone and acrylic topcoats.
Common questions from Navan homeowners
How much does external wall insulation cost in Navan in 2026?+
A job typically starts from €180 to €220. Final figures depend on extras, architectural details, and chosen finishes — such as whether silicone-based acrylic render is required for enhanced weather resistance, and whether window cills subject to high water runoff require special powder coating. As an SEAI Registered Contractor (#10423), Isotherm deducts your SEAI grant (up to €8,000 for detached, €6,000 for semi-detached/end-terrace, €3,500 for mid-terrace, and €3,000 for apartments) directly from your invoice at source.
How quickly can your crews travel from Inchicore to Navan?+
Our operations base and metal fabrication workshop are located at Unit 20, Westlink Industrial Estate, Kylemore Road, Inchicore, Dublin 10 (D10 TD35). Taking the M50 and M3 motorway corridor, our installation crews and scaffold transport reach Navan in 35 to 40 minutes, providing seamless daily site management and material supply.
Do 1970s and 1980s Navan houses benefit most from external insulation?+
Yes. Estates built during Navan's rapid residential expansion—such as Silverlawns, Blackcastle, St. Martha's, and Claremont—often have uninsulated 9-inch hollow concrete block walls or cavity walls with failed or missing insulation. External wall insulation places a continuous 100mm–150mm graphite EPS blanket over all exterior walls, stopping cold air infiltration, condensation, and black mould permanently.
Do I need planning permission to wrap my home in Navan?+
For standard residential housing across Navan suburbs, external insulation is Exempted Development under Section 4(1)(h) of the Planning and Development Act 2000. For properties located within the historic Navan Town Centre Architectural Conservation Area (ACA) or Protected Structures along Ludlow Street or Academy Street, planning consultation with Meath County Council is required. We evaluate planning exemption status during our survey.
How are window sills and external ESB/gas meters managed in Navan?+
We supply and install bespoke powder-coated aluminium window sills manufactured by our sister workshop, Cills.ie. These feature welded upstands and thermal pads to ensure watertight rainwater run-off. External ESB meter boxes, gas supply pipes, and garden pipework are extended neatly using certified standoff brackets and airtight grommets before render application.
Can Navan homeowners claim the SEAI grant if they previously had cavity bead insulation?+
Yes. Under the SEAI 2026 'second wall measure' grant guidelines, homes that previously received a cavity bead insulation grant can now claim the full €6,000 to €8,000 external wall insulation grant to reach A2/A3 building energy performance.
Book your free on-site survey in Navan
Our direct installation crews cover Johnstown, Blackcastle, Beaufort, Abbeylands, Silverlawns, Beechmount, and all Navan areas. Up to €8,000 in SEAI grants deducted straight from your invoice.
