Spray Foam Insulation Cost Per Square Metre – Is It Worth It?

When it comes to home insulation, spray foam insulation is one of the most effective solutions available. It provides superior thermal resistance, reduces energy bills, and enhances comfort. However, many homeowners and business owners hesitate to invest in it due to concerns about cost.

In this guide, we’ll explore spray foam insulation cost per square metre, factors affecting pricing, and whether it’s worth the investment for your property. By the end, you’ll have a clear understanding of the benefits, costs, and return on investment (ROI) of spray foam insulation.

What is Spray Foam Insulation?

Spray foam insulation is a high-performance insulating material applied as a liquid that expands into a thick foam, filling gaps and sealing air leaks. It’s widely used in attics, walls, floors, and even industrial buildings.

There are two main types of spray foam insulation:

The type of foam used significantly impacts the spray foam insulation cost per square metre, so it’s crucial to choose the right one for your needs.

How Much Does Spray Foam Insulation Cost Per Square Metre?

The spray foam insulation cost per m² varies depending on multiple factors, including property type, insulation thickness, and complexity of installation. Here’s a general pricing guide:

Insulation Type	Cost Per Square Metre (€)
Attic or Loft Insulation	€20 – €35
Attic with Vent Card	€23 – €38
Internal Wall Insulation	€20 – €30
External Wall Insulation	€18 – €25
Shed Insulation	€15 – €25
Container Insulation	€16 – €25
Industrial Insulation	€16 – €30

Average Spray Foam Insulation Cost by Property Type

For a more specific breakdown, here’s what homeowners can expect to pay for attic insulation based on their property size:

Property Type	Estimated Cost (€)
2-Bed House	€1,300 – €1,800
3-Bed House	€1,600 – €2,200
4-Bed House	€2,000 – €2,800
5-Bed House	€2,350 – €3,800

Larger homes and properties with complex insulation requirements may cost more.

Factors Affecting Spray Foam Insulation Cost

Several factors influence the final spray foam insulation cost per square metre, including:

1. Type of Spray Foam Used

• Open-cell foam is typically cheaper but offers lower insulation values.
• Closed-cell foam is denser and provides better thermal resistance but costs more.

2. Area to be Insulated

The size of the area being insulated directly affects the cost. Larger projects may receive discounts on the price per square metre.

3. Thickness of Insulation

Thicker insulation provides better thermal protection but increases costs. Most spray foam insulation is applied in layers, with thicker applications requiring more material and labour.

4. Complexity of Installation

Difficult-to-access areas, such as attics with intricate designs or buildings with structural obstructions, may increase labour costs.

5. Property Location

Labour rates and material costs vary by region. If your property is in a remote area, travel costs for the installation team may also apply.

6. Additional Features

Some installations require extra materials, such as vent cards for attic insulation, which can slightly increase the cost.

Are There Grants for Spray Foam Insulation?

Yes! The Sustainable Energy Authority of Ireland (SEAI) offers grants for attic and wall insulation, making spray foam insulation more affordable.

SEAI Attic Insulation Grant Values

Property Type	Grant Amount (€)
Apartment	€800
Mid-Terrace House	€1,200
Semi-Detached/End Terrace	€1,200
Detached House	€1,500

SEAI Internal Wall Insulation Grant Values

Property Type	Grant Amount (€)
Apartment	€1,500
Mid-Terrace House	€2,000
Semi-Detached/End Terrace	€3,500
Detached House	€4,500

Applying for a grant can significantly lower your spray foam insulation cost per square metre and improve energy efficiency in your home.

Is Spray Foam Insulation Worth It?

1. Energy Efficiency & Cost Savings

Spray foam insulation reduces heat loss, keeping your home warm in winter and cool in summer. It can cut energy bills by up to 50%, meaning you recover the cost over time through savings.

2. Long Lifespan

Unlike traditional insulation materials like fibreglass, spray foam insulation can last 30–50 years without deterioration, making it a long-term investment.

3. Air Tightness & Moisture Resistance

• Closed-cell spray foam acts as a moisture barrier, preventing dampness and mould.
• Reduces draughts, improving home comfort.

4. Soundproofing

Open-cell spray foam helps with noise reduction, making it ideal for urban homes or properties near busy roads.

5. Adds Property Value

An energy-efficient home with high-quality insulation appeals to buyers and increases property resale value.

Spray Foam vs. Traditional Insulation

Feature	Spray Foam Insulation	Traditional Insulation (Fibreglass/Cellulose)
Thermal Resistance	High	Moderate
Lifespan	30–50 years	10–20 years
Moisture Resistance	Excellent (closed-cell)	Poor (absorbs moisture)
Air Sealing	Yes, prevents draughts	Limited
Soundproofing	Good	Low
Environmental Impact	Lower energy use	Often requires replacement

Spray foam offers superior insulation, a longer lifespan, and better protection against moisture compared to traditional options.

Conclusion

If you’re looking for a high-performance, long-term insulation solution that reduces energy bills, prevents moisture damage, and improves home comfort, spray foam insulation is worth the investment.

While the spray foam insulation cost per square metre may seem high initially, SEAI grants, energy savings, and increased property value make it a cost-effective solution over time.

For an accurate quote based on your specific property, it’s best to consult a professional insulation contractor.

Interested in getting a quote for spray foam insulation? Contact Tamburah Ltd today to explore options and maximise your home’s energy efficiency!