External Wall Insulation in Greystones, Co. Wicklow
Eliminate cold drafts, prevent damp, and lower your home heating bills by up to 50%. Isotherm installs premium, NSAI-certified Baumit external wall insulation systems across Greystones with our own full-time expert crews. We fit bespoke aluminium window sills from Cills.ie and deduct your SEAI grant up to €8,000 directly from your final invoice.
Greystones 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 close to the sea, we apply specialized silicone-based acrylic renders (such as Baumit SilikonTop) to withstand coastal moisture, heavy driving salt rain, and prevent algae staining.
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 for sea-facing locations, and special powder coating for window cills. Fixed quotation provided after a free on-site survey.
Insulating Greystones Estates & Coastal Residences
Greystones features a blend of coastal suburban developments, period Edwardian architecture, and detached homes in Delgany.
Suburban 3- and 4-bed family homes with concrete block cavity walls. External insulation stops heat escaping through exterior gables and cures cold spots around windows.
Substantial detached residences with large exterior wall surfaces. Our €8,000 SEAI grant deduction transforms these properties into highly efficient A/B rated homes.
Homes near the coast and Marina exposed to Irish Sea gale winds and salt moisture. Baumit SilikonTop silicone render provides superior water repellency and self-cleaning performance.
Real project photos across Greystones
Every home is surveyed, scaffolded, wrapped with certified Baumit graphite EPS, and completed with custom aluminium window sills by our own direct crews.
Charlesland & Killincarrig, Greystones
1990s 3-Bed Semi-Detached House
System: Baumit ProSystem 100mm Graphite EPS (λ 0.031)
Finish: Baumit SilikonTop 1.5mm (Chalk White 0019)
Sill Detail: Bespoke RAL 7016 Anthracite Sills by Cills.ie
BER Upgrade: D1 (245 kWh/m²/yr) → A3 (62 kWh/m²/yr with Attic Upgrade)
Exterior wrap eliminated heat loss through cold gable and front bays. Gas heating consumption reduced by 46%.
The Burnaby & Delgany Corridor, Greystones
1980s 4-Bed Detached Residence
System: Baumit OpenSystem Breathable Mineral Composite Wrap
Finish: Baumit NanoporTop Self-Cleaning Silicone (Pebble Grey 0876)
Sill Detail: Aluminium sills fabricated by Cills.ie in RAL 9005 Jet Black
BER Upgrade: D2 (275 kWh/m²/yr) → B1 (78 kWh/m²/yr)
Four exterior elevations fully wrapped. Hydrophobic silicone finish prevents salt spray staining and algae bloom.
Redford Park & Rathdown Park, Greystones
1980s 4-Bed Semi-Detached Home
System: Baumit ProSystem 120mm Graphite EPS
Finish: Baumit SilikonTop 1.5mm (Oatmeal Cream 0244)
Sill Detail: Custom aluminium window over-sills with welded end caps by Cills.ie
BER Upgrade: E1 (320 kWh/m²/yr) → B1 (82 kWh/m²/yr)
Hollow concrete block gable wall insulated. Upstairs bedroom temperatures increased by 3.5°C with heating off.
Baumit, Sto & Weber external insulation systems
We install full NSAI-certified external wall insulation systems engineered for coastal wind-driven rain and Irish weather extremes.
Our primary system for Greystones homes. High-density graphite EPS (λ = 0.031) or breathable openTherm mineral boards, finished with self-cleaning Baumit SilikonTop silicone render that resists salt spray, coastal 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 mountain and coastal 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 Greystones homeowners
How much does external wall insulation cost in Greystones 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 homes close to the sea to withstand coastal salt air, 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.
Why is Baumit SilikonTop silicone render specified for Greystones coastal homes?+
Greystones faces open sea winds carrying salt particles and heavy driving rain. Traditional sand-and-cement renders absorb moisture and develop unsightly algae staining. Baumit SilikonTop silicone-based acrylic render provides high water repellency with vapour permeability, keeping exterior walls dry, clean, and resistant to coastal weathering without requiring frequent painting.
How fast can Isotherm crews reach Greystones from your depot?+
Our operations base and fabrication workshop are located at Unit 20, Westlink Industrial Estate, Kylemore Road, Inchicore, Dublin 10 (D10 TD35). Taking the M50 South and N11 / R774 Greystones dual carriageway, our installation teams and material deliveries reach Greystones in 30 to 35 minutes.
Do I need planning permission for external wall insulation in Greystones?+
For suburban housing estates across Greystones (including Charlesland, Redford Park, Woodlands, and Rathdown Park), external wall insulation is classified as Exempted Development under Section 4(1)(h) of the Planning and Development Act 2000. If your home is located within The Burnaby Architectural Conservation Area (ACA) or is an Edwardian Protected Structure, consultation with Wicklow County Council is required. We evaluate planning guidelines during your site survey.
How are window sills handled on Greystones house wraps?+
Because 100mm–150mm insulation extends the outer wall profile, existing concrete window sills lose their overhang projection. We install bespoke powder-coated aluminium over-sills manufactured by our sister workshop, Cills.ie. Each sill features welded watertight end-caps, thermal separation pads, and deep drip projections to ensure rainwater drains cleanly.
Can Greystones homeowners claim the SEAI grant if they previously had cavity bead installed?+
Yes. Under the SEAI 2026 'second wall measure' regulations, homeowners who previously claimed a cavity bead injection grant are fully eligible to claim the €6,000 (semi-d) or €8,000 (detached) external wall insulation grant to reach A2/A3 energy efficiency.
Book your free on-site survey in Greystones
Our direct installation crews cover Charlesland, The Burnaby, Delgany, Killincarrig, Redford, and all Greystones areas. Up to €8,000 in SEAI grants deducted straight from your invoice.
