Cavity Wall Insulation Cost Calculator – Ireland
Here’s a comprehensive table for cavity wall insulation costs in Ireland, covering insulation types, average costs, pros and cons, as well as key considerations for each option. This will help you understand the different insulation options, their costs, benefits, and ideal applications.
| Insulation Type | Average Cost per Square Meter (EUR) | Total Cost (for 100 sq m) | Pros | Cons | Best Applications |
|---|---|---|---|---|---|
| Polystyrene Beads | €12 - €18 | €1,200 - €1,800 | Excellent thermal insulation, moisture-resistant, long-lasting. | May settle over time, requires professional installation. | Older cavity walls, areas prone to moisture. |
| Mineral Wool | €10 - €15 | €1,000 - €1,500 | Affordable, fire-resistant, good acoustic insulation. | Less moisture-resistant, can deteriorate if exposed to water. | General cavity wall insulation, dry climates. |
| Polyurethane Foam | €15 - €20 | €1,500 - €2,000 | Superior thermal performance, high-density, expands to fill gaps. | Higher cost, non-breathable, difficult to remove once installed. | Hard-to-insulate cavities, colder climates. |
Key Considerations for Cavity Wall Insulation in Ireland
- Climate Impact: Ireland's damp climate may affect some insulation materials, especially mineral wool, which can absorb moisture and lose effectiveness over time. Polystyrene beads and polyurethane foam tend to resist moisture better.
- Thermal Efficiency: Polyurethane foam generally offers the highest thermal performance among cavity wall insulation types, making it ideal for colder regions. Polystyrene beads are also highly effective for insulation.
- Sound Insulation: Mineral wool is a great choice if acoustic insulation is important, as it helps reduce sound transmission through walls.
- Fire Resistance: Mineral wool is non-combustible, making it a safer option for fire resistance compared to other insulation materials, particularly in areas with strict fire safety regulations.
- Installation: Cavity wall insulation should generally be installed by professionals to ensure proper filling and avoid air gaps. For polyurethane foam, professional installation is essential due to its expanding properties.
Summary of Pros and Cons
- Polystyrene Beads: Pros include moisture resistance and durability. However, they may settle over time and require professional installation.
- Mineral Wool: This option is cost-effective and provides both fire and sound insulation, though it is less effective in damp environments.
- Polyurethane Foam: Provides high insulation value and seals gaps effectively but is more expensive and can be challenging to remove.
Environmental Considerations
- Eco-Friendliness: Mineral wool is often made from recycled materials, making it a more eco-friendly choice. Polystyrene beads and polyurethane foam are derived from petroleum products and have a larger environmental footprint.
- Breathability: Mineral wool allows walls to "breathe," reducing the risk of trapped moisture, while polyurethane foam is non-breathable.
Estimated Annual Energy Savings
Cavity wall insulation can lead to annual energy savings of approximately €200 - €400, depending on the insulation type, wall area, and climate. It can pay for itself within 3-8 years, depending on the initial installation cost and energy savings.
This table and information should help you make an informed choice when selecting cavity wall insulation in Ireland, considering both cost and specific needs.