Spray Foam Insulation Dublin
Keep Your Home Warmer, More Energy Efficient, and Better Protected
If you’re looking for an effective way to reduce heat loss and improve comfort throughout the year, spray foam insulation offers a long-lasting solution. At OS Holding, we provide professional spray foam insulation in Dublin for homeowners looking to improve energy efficiency, reduce draughts, and create a more comfortable living environment.
Every property is different, which is why we begin with a free, no-obligation site survey. We’ll assess your roof or wall construction, recommend the most suitable insulation system, and explain whether open-cell or closed-cell spray foam is the right choice for your home.
Whether you’re upgrading an older property, renovating your home, or improving a converted attic, our team delivers tailored insulation solutions designed around your property’s specific requirements.
Is Spray Foam Right for Your Roof?
Not every roof suits spray foam, and we would rather tell you that at survey than after installation. The right answer depends on how the roof is built, how it is ventilated, and what you plan to do with the house.
Spray foam tends to work well where the roof structure is sound and dry, where the space is being brought into use, and where the alternative would leave awkward gaps and junctions that traditional insulation cannot close. It performs less well, and we will usually recommend something else, where there is existing damp or timber decay that has not been resolved, where the roof covering is near the end of its life, or where the ventilation strategy has not been thought through.
Because the wrong system can trap moisture rather than manage it, we assess the roof before recommending anything. If a conventional attic insulation upgrade would serve you better, we will say so.
Open-Cell vs Closed-Cell Spray Foam
Two different products with genuinely different behaviour. Most of the decisions we make at survey come down to choosing between them.
| Open-cell | Closed-cell | |
|---|---|---|
| Density and feel | Softer, sponge-like | Rigid and dense |
| Insulation value per inch | Lower | Higher |
| Vapour behaviour | Breathable, allows some vapour movement | Acts as a vapour and air barrier |
| Typically used for | Attic roof spaces where breathability helps | Flat roofs and areas exposed to damp |
| Relative cost | Lower | Higher |
Open-cell is the more common choice for attic roof spaces in Irish homes, where some vapour permeability is an advantage. Closed-cell earns its higher cost where a stronger air and moisture barrier is needed.
Energy ratings now shape the market: 64% of Ireland’s 1.37 million BER rated dwellings are rated C or lower, and 232,158 homes have improved by at least one full letter between assessments, per the CSO figures in our home energy and retrofit statistics for Ireland.
Spray Foam, Selling Your Home and Mortgages
This is the question we are asked most often, and it deserves a straight answer rather than a sales one.
Spray foam applied to a roof structure has become something that lenders and surveyors pay attention to when a property is being sold or remortgaged. Views differ between institutions. Some treat a properly specified and documented installation as unremarkable; others ask for more information; a surveyor may flag it for further comment. It is not a reason to rule spray foam out, but it is a real consideration and you should go in knowing about it.
What makes the difference is documentation and specification. Keep your paperwork: the product installed, its certification, the survey findings, the ventilation detail and the warranty. An installation that can be evidenced is a far easier conversation with a surveyor than one that cannot.
Our practical advice is this. If you expect to sell or remortgage in the near future, tell us at survey and we will factor it into what we recommend, including recommending a conventional insulation upgrade instead where that is the more sensible route for your circumstances. If you are staying put, the question matters less, but the documentation still matters.
What We Install
The spray foam product we install is KIWA BDA certified, and the installed product carries a 25-year product warranty. Workmanship and material warranties are also available as set out in your contract.
We will confirm the exact product, its certification and the full warranty terms in writing with your quotation, so you have the documentation from the outset rather than having to chase it later.
How Much Does Spray Foam Insulation Cost?
Cost depends on the type of foam required, the size of the roof or wall area, ease of access and the complexity of the installation.
As a general guide:
- Whole-home spray foam insulation typically ranges from €25–€60 per m²
- Attic spray foam insulation generally ranges from €50–€100 per m², with total project cost varying according to property size
These are guide ranges to help you budget, not a quotation. Following your free survey we provide an exact fixed price based on your property.
What Is Included
- Free site survey and no-obligation quotation
- Assessment of your roof or wall construction, ventilation and timber condition
- A recommendation on whether spray foam suits your property, and which type
- Professional installation by an insured contractor
- Written confirmation of the product, certification and warranty
- A dedicated project manager from survey through to completion
Our Process
1. Free site survey
We inspect the roof or wall space, assess construction and ventilation, and check for damp or timber decay that needs resolving first.
2. Recommendation and fixed quotation
We tell you whether spray foam is the right choice, which type, and what it will cost. If another form of insulation suits you better, we will recommend that instead.
3. Installation
Carried out to the agreed specification, with the areas fully covered and the work managed by your project manager.
4. Final inspection and documentation
We walk the completed work with you and hand over the product, certification and warranty paperwork.
If Spray Foam Is Not Right for Your Home
Spray foam is one option among several, and it is not the answer for every house. Depending on your property, attic insulation at joist level, external wall insulation or internal dry lining may deliver more for the money with fewer considerations attached.
Our home insulation page sets out all four options and which type of Dublin property each one suits. If you are converting the attic rather than just insulating it, see attic conversions.
Why Homeowners Choose OS Holding
- Fully insured building contractor
- Registered with the Construction Industry Register Ireland (CIRI)
- Member of the National Guild of Master Craftsmen and the Construction Industry Federation
- Free survey and fixed written quotation
- Honest advice on whether spray foam suits your property, including when it does not
- A complete building team, so insulation can form part of a wider renovation
Serving Homeowners Across Dublin
We install spray foam insulation for homeowners throughout Dublin city and county and the surrounding commuter belt in Kildare, Meath and Wicklow, for existing homes, attic upgrades and properties undergoing renovation.
See Our Recent Work
Spray Foam Insulation Dublin FAQs
Is spray foam insulation suitable for every roof?
Not always. The correct insulation depends on your roof construction, ventilation and overall building design. We assess your property before recommending spray foam, because using the wrong system may trap moisture rather than manage it effectively. If a conventional insulation upgrade suits your property better, we will tell you.
Will spray foam affect selling my house or getting a mortgage?
It is something lenders and surveyors pay attention to, and views differ between institutions. Some treat a properly specified and documented installation as unremarkable, others ask for more information. Keeping your documentation matters: the product, its certification, the survey findings, the ventilation detail and the warranty. If you expect to sell or remortgage soon, tell us at survey and we will factor it into what we recommend.
What is the difference between open-cell and closed-cell spray foam?
Open-cell spray foam is softer, more breathable and typically used in attic roof spaces where some vapour permeability is beneficial. Closed-cell spray foam is denser, offers a higher insulation value per inch and provides a stronger air and moisture barrier, making it suitable for areas exposed to damp conditions.
How much does spray foam insulation cost?
Costs vary depending on the foam type, the area being insulated and accessibility. As a general guide, whole-home installations typically range from €25–€60 per m², while attic installations generally range from €50–€100 per m². These are guide ranges rather than a quotation; we provide an exact fixed price after your free survey.
Can spray foam help reduce energy bills?
By reducing unwanted heat loss and improving your home’s thermal performance, spray foam insulation can reduce heating costs. The actual saving depends on the condition of the property, the insulation already in place and your heating system, which is why we assess before we recommend.
Does spray foam help with condensation?
When correctly specified and installed, spray foam helps reduce uncontrolled air movement that can contribute to condensation. Choosing the correct foam type for your property’s construction is essential, and any existing damp or ventilation problem needs to be resolved first rather than insulated over.
Is the spray foam product certified, and is there a warranty?
Yes. The spray foam product we install is KIWA BDA certified, and the installed product carries a 25-year product warranty. Workmanship and material warranties are available as set out in your contract. We confirm the product, certification and full warranty terms in writing with your quotation.
Is spray foam suitable during a home renovation?
Yes. Many homeowners install spray foam while renovating, because access to roof spaces is easier during construction work. If you are already upgrading your property we can integrate the insulation into the wider project under one contract.
How can I book a free site survey?
Contact us through the website or by phone to arrange a free site survey. We will assess the roof or wall space, tell you whether spray foam is the right choice, and provide a no-obligation quotation.
Ready to Improve Your Home’s Energy Efficiency?
Whether you’re upgrading an older property, planning a renovation or looking for a more effective insulation solution, OS Holding can help you choose the right spray foam insulation for your home.
Our team will assess your property, explain the options available and provide a free, no-obligation quotation based on your specific requirements. If spray foam isn’t the right solution for your roof or wall construction, we’ll tell you and recommend the most suitable approach.
As a fully insured building contractor with dedicated project management and recognised industry memberships, we’re committed to delivering insulation solutions that support the long-term performance of your home.
Commitments for Project
As a top building contractor, our team of expert tradesmen and managers is dedicated to ensuring the seamless completion of your project. Particularly, we will guide you through the process and ensure transparency to help you make informed decisions.
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