cavity wall insulation

Our cavity wall insulation solutions minimise drafts and prevent heat from escaping through external walls. We use approved materials to ensure long-lasting performance and compliance with Irish regulations.

Cavity Wall Insulation is a cost-effective energy upgrade for homes built with a suitable cavity between external walls. When correctly assessed and installed, it significantly reduces heat loss, improves comfort, and lowers heating costs—often with minimal disruption to the property.

This solution is particularly suitable for many Irish homes built from the mid-1980s onwards, subject to a full suitability assessment.

Key Benefits of Cavity Wall Insulation

  • Reduced heat loss through external cavity walls
  • Lower energy bills and improved overall efficiency
  • Improved comfort with warmer internal wall surfaces
  • Quick installation with minimal disruption
  • No loss of internal or external space
  • SEAI grant support available, reducing upfront costs

SEAI Grant Support – Up to €1,700

Cavity Wall Insulation may qualify for an SEAI Home Energy Grant, subject to eligibility and scheme conditions:

  • Detached house: up to €1,700
  • Semi-detached / End of terrace: up to €1,200
  • Mid-terrace house: up to €700
  • Apartment: up to €700

Grants are paid once works are completed and verified in accordance with SEAI requirements.

Installed to SEAI & NSAI Standards

All cavity insulation works are carried out in line with:

  • SEAI Domestic Technical Standards & Specifications
  • SR 54 Code of Practice for Energy Efficient Retrofit
  • NSAI Agrément / certified system requirements

Before any installation, we carry out a site-specific suitability assessment, considering:

  • wall construction and cavity width
  • exposure to wind-driven rain
  • condition of masonry and existing vents
  • presence of existing insulation or partial fills

Only suitable properties proceed to installation—this is critical for long-term performance and moisture control.

Attention to Detailing & Ventilation

Correct detailing is essential for cavity insulation to perform as intended. Our works include:

  • protection and reinstatement of vents and openings
  • correct drilling pattern and fill methodology
  • careful sealing and finish reinstatement
  • ventilation assessment where required under SEAI guidance

This approach ensures energy performance is improved without increasing condensation or damp risk.

Is Cavity Wall Insulation Right for Your Home?

Cavity insulation is ideal where:

  • the cavity is clear, continuous, and of adequate width
  • the property is suitable for its exposure level
  • a cost-effective energy upgrade is desired
  • works are part of a wider retrofit or BER improvement plan

A professional assessment is essential before confirming suitability or grant eligibility.

A Simple Upgrade with Lasting Benefits

When correctly specified and installed, Cavity Wall Insulation delivers fast, measurable improvements in comfort and efficiency. As a contractor experienced in SEAI grant -funded and compliance-led retrofit works, we focus on assessment, quality, and certification ensuring your insulation performs as intended and meets all inspection requirements.

OUR PROJECTS

FREQUENTLY ASKED QUESTIONS

Homeowners can access SEAI Home Energy Grants to help cover the cost of insulation upgrades. The exact grant amount depends on the measure and property type. For example, external wall insulation grants can be up to €8,000 for a detached home, €6,000 for a semi-detached, €3,500 for a mid-terrace, and €3,000 for an apartment. Other insulation grants (attic, cavity, internal wall) have their own values based on property type.

Yes. To be eligible for SEAI grant funding, all energy upgrade works including insulation must be carried out by an SEAI-registered contractor. This ensures the installation meets SEAI technical standards and is inspection ready. After works are completed, you’ll also need to submit a post-works BER assessment and signed documentation to SEAI to draw down the grant.

This depends on the measure and property size:

  • Attic or cavity insulation: typically, 1-2 days
  • Internal wall insulation: several days, depending on scope
  • External wall insulation: usually 2-4 weeks

A clear schedule is agreed in advance.