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    How much does spray foam insulation cost in Ireland?

    Spray foam insulation is an excellent insulation material at reducing heat loss if used by professionals who obey Irish Building Regulations. It is important to remember that while open cell spray foam insulation is breathable, the moisture needs a 50mm air gap between the insulation material and the roofing felt to allow the water vapour to escape your attic. If building regulations are not followed there can be moisture buildup that can be hazardous to your health and can rot your roofing timbers. Alway make sure you maintain a 50mm air gap between the foam and the roofing felt which can be achieved by adding a breathable vent card between the rafters.

    How much does spray foam insulation cost?

    The costs will depend on the type of foam used, the quality of the foam, the ease of access to the area insulated, the amount of labour used and travel time to and from your property.

    The advantages of using spray foam insulation include its ability to effectively seal gaps and cracks, its ability to insulate against both heat and cold, and its durability. It can also help to reduce air leakage, which can improve the overall energy efficiency of a building.

    How much does spray foam insulation cost per m2?

    The cost of insulating your attic or loft depends on the type of material used and the type of property. More information on attic insulation costs.

    Below is an example of costs based on a 150m2 detached house.

    Attic or Loft €18 - €30 /m2
    Attic + Vent Card €21 - €33 /m2
    Internal Wall €18 - €28 /m2
    External Wall €16 - €22 /m2
    Shed €13 - €22 /m2
    Container €14 - €22 /m2
    Industrial €14 - €28 /m2

    What is open cell spray foam insulation?

    Open cell spray foam insulation is normally used in applications where people live or work. It is breathable yet airtight and expands to over 200 times its size on application.

    The resulting foam allows water vapour to pass through its open cells helping to prevent harmful damp and mold to build up.

    It is most commonly used in home insulation applications, attic, wall, floor, roof and external insulation. Once applied it is long lasting and performs at a very constant level. It fills every nook and cranny when sprayed making it ideal for maintaining an airtight envelope.

    What is closed cell spray foam insulation?

    Closed cell spray foam insulation is mainly used on metal and concrete surfaces. As the name suggests, unlike open cell spray foam, closed cell foam's cells are closed, not allowing for the transfer of water vapor while maintaining a perfect airtight seal.

    Applied on commercial and farm sheds, shipping containers and industrial pipes and equipment, closed cell foam is easily applied and is very effective at getting into every nook and cranny. It is often used when sheds are converted to commercial use where people are working.

    What is slow pour insulation foam?

    Slow pour form is an open cell foam that expands slowly to make sure its expansion does not damage the fabric of the building. It is used in cavity wall insulation and is able to expand into hard to reach areas producing great thermal efficiency.

    What is spray foam insulation?

    Spray foam insulation is a type of insulation that is applied as a liquid and then expands to form a solid, foam-like material. It is typically made from polyurethane and is applied using a spray gun. When applied, the liquid foam fills gaps and cracks, sealing the area and creating an airtight barrier.

    Spray foam insulation is created when 2 compounds, isocyanate and a poly resin meet in an exothermic reaction after having been fired together by a gun. The resulting material is in the polyurea family of compounds and comes in 3 forms. Open cell spray foam, closed cell spray foam and slow pour foam.

    What are the average costs of attic spray foam attic insulation?


    Spray Foam Attic Insulation Costs
    House Size Price Range
    2 Bed House €1,250 - €1,700
    3 Bed House €1,500 - €2,100
    4 Bed House €1,900 - €2,700
    5 Bed House €2,250 - €3,700
    New Build Will need to survey
    Bungalows Will need tosurvey

    What is a breathable vent card?

    A breathable vent card is placed 50mm from the roofing felt to allow escaping water vapour a way to escape the structure. The form is then applied on top of the card, unless your roof has been counter battened.



    Are there grants for spray foam insulation?

    Yes there is a SEAI government backed grant for attic insulation, internal, external wall insulation and cavity wall insulation. For more information visit Part L of the Irish Building Regulations.

    If you are interested in finding our more about how to get a government grant for insulation visit Home Energy Insulation Grants.

    This is a great site if you want to find out more about Spray Foam Insulation in Ireland.

    Ask your contractor for help with the forms.


    SEAI Insulation Grants
    Attic Insulation Grant Value
    Apartment (any) €800
    Mid-Terrace €1,200
    Semi-detached or end of terrace €1,200
    Detached house €1,500
    Internal Wall Insulation Grant Value
    Apartment (any) €1,500
    Mid-Terrace €2,000
    Semi-detached or end of terrace €3,500
    Detached house €4,500

    Spray Foam Insulation Contractors

    We have a network of local spray foam insulation and attic insulation contractors that provide the complete range of spray foam insulation services.



    Let us know where you live by putting in your Eircode or Post Code, we can tell by looking at google maps when the building was constructed and what type of insulation you'll need.

    Contact us for a free quote


    Customer Reviews

    Excellent service from start! ★★★★★

    Reviewed by Mary Sheehan, Co. Cavan, on 15 October 2024
    Excellent service from start to finish. The team were on time, professional, and very tidy. Our attic insulation has made a huge difference to our heating bills.

    Professional and Efficient ★★★★★

    Reviewed by John Doran, Co. Kerry. on 3 November 2024
    Very impressed with the insulation work. The crew arrived on time and got the job done quickly. We noticed the house is much warmer now and the heating bills are lower.

    Highly recommended ★★★★★

    Reviewed by Aisling Ryan, Dublin 6. on 20 December 2024
    Great communication and excellent results. They explained all our options clearly and we’re delighted with the outcome. Would definitely recommend them to others.

    By Paul Hart

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