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External Wall Insulation in Mayo

Direct external wall insulation contractor serving Mayo. Certified Sto and Baumit systems with SEAI grant deductions.

We install certified Baumit external wall insulation systems across County Mayo, serving homeowners in Castlebar and surrounding areas.

Local Housing Stock
Property profiles in Mayo
Mayo has a varied mix of housing types, from older stone cottages and solid block farmhouses to modern housing estates. Many solid-wall properties in County Mayo suffer from high heat loss and dampness because they lack a cavity wall. External wall insulation is the most effective retrofit method for these properties, protecting the structural walls and dramatically boosting the BER rating.
Climate Challenges
Weather exposure in Mayo
County Mayo experiences typical Irish weather, marked by high moisture levels, cold damp periods, and rain. Damp masonry conducts heat away from the home much faster. EWI acts as a waterproof shield, keeping the internal walls warm and dry, which eliminates damp and mould issues while keeping heating bills low.

Planning & Council Regulations in Mayo

Planning Authority: Mayo County Council

In County Mayo, external wall insulation is generally considered exempted development under planning regulations, provided it does not change the essential character of the area. However, if your building is listed as a Protected Structure or lies in a Conservation Area, you should consult with Mayo County Council before beginning installation.

2026 SEAI Grants in Mayo

We process the SEAI grant paperwork on your behalf and deduct the grant amount directly from your invoice.

Detached
€8,000
Semi-D
€6,000
Mid-Terrace
€3,500
Apartment
€3,000
Eligibility: Your home in Mayo must have been built and occupied before 2011. We handle the pre-works SEAI application prior to starting on site.

Areas Covered in Mayo

Our installation crews cover towns and residential estates across Mayo, including:

Castlebar Westport Ballina Claremorris Ballinrobe
Progress

Step 1 of 3

1. Property Profile

Select your building details to start your out-of-pocket calculation.

*Note: Properties must be built and occupied before 2011 to qualify for the SEAI grant.

Contractor Standards

Certified Sto & Baumit Systems Installed in Mayo

Every wrap in Mayo includes bespoke powder-coated aluminium window sills fabricated by our sister workshop, Cills.ie.

Sto render finish with custom Cills.ie aluminium sills on an external wall insulation project in Mayo

StoTherm Classic System · Mayo

High-durability organic basecoat and self-cleaning silicone topcoat with custom aluminium sills preventing cold bridges.

Baumit external insulation system with extended window sills on a completed house wrap in Mayo

Baumit openSystem · Mayo

Vapour-permeable breathable insulation with unclipped gas meter box brackets and sleeved wall ventilation.

Frequently Asked Questions (Mayo)

Do I need planning permission for EWI in Mayo?+

For most standard homes in County Mayo, EWI is exempt from planning. However, for historical structures or properties in conservation areas, you must check with Mayo County Council.

How much is the SEAI grant for external insulation in Mayo?+

SEAI offers grants of up to €8,000 for detached houses, €6,000 for semi-detached/end-terrace houses, €3,500 for mid-terrace houses, and €3,000 for apartments in County Mayo. Isotherm deducts this directly from your invoice.

Book your on-site wall survey in Mayo

We survey your property, specify the certified Sto or Baumit system, calculate your SEAI grant, and carry out the installation with direct crews.

Call 01 223 8774Request Survey Online