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Renovation Insulation Products FAQ

A renovation project brings exciting prospects for your home—from a fresh aesthetic appeal and added space to a boost in your property’s value. One key way to maximise these benefits is by upgrading your insulation. Enhanced insulation not only improves energy efficiency, reducing your heating costs but also ensures a more comfortable and consistent indoor environment throughout the year.

By choosing Unilin Insulation as your renovation partner, you are assured of a comprehensive product range and expert technical advice tailored to your project’s needs. We push boundaries to improve people’s quality of life by creating Better Spaces and Better Homes. Explore the FAQs below to learn more about our high-performance insulation solutions for roofs, walls, framing, and floors.

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External Wall Insulation

What is external wall insulation?

External wall insulation involves adding an insulating layer to the exterior of a building’s walls. This improves energy efficiency and maintains interior space, making it ideal when interior space is limited.

What products are available for external wall insulation?

There are two main products:

  • WARM-R SD E Grey EWB: High-quality expanded polystyrene with integrated graphite for improved thermal performance.

  • Stonewool EWI: High-density insulation slab with excellent fire performance and acoustic properties.

What are the benefits of WARM-R SD E Grey EWB?

This insulation provides high thermal performance, is available in various sizes and thicknesses, and is especially useful when interior space is limited.

Why choose Stonewool EWI for external wall insulation?

Stonewool EWI offers robust, high-density insulation with a Euroclass A1 fire classification. It also improves acoustic performance and remains stable over the building’s lifetime.

When should I use external wall insulation?

External wall insulation is best used when:

  • Interior space is limited, and you want to avoid reducing room size.

  • You need to enhance the building’s thermal efficiency without disrupting the interior.

Can external wall insulation be used for new builds and renovations?

Yes, external wall insulation is suitable for new construction and retrofit projects to improve energy efficiency in existing buildings.

How does external wall insulation improve energy efficiency?

By adding insulation to the outside of a building, heat loss is reduced, which helps maintain a consistent internal temperature, lowers energy consumption, and reduces heating costs.

Are there different thicknesses available for external wall insulation?

Yes, products like WARM-R SD E Grey EWB come in various sizes and thicknesses to meet specific thermal requirements and project needs.

Do I need professional installation for external wall insulation?

Yes, external wall insulation should be installed by professionals to ensure it is properly fitted and meets all building regulations.

Can external wall insulation affect the appearance of my building?

Yes, but the insulation can be covered with a decorative finish or render, allowing you to maintain or enhance the aesthetic of your building.

What is the thermal performance of external wall insulation products?

The thermal performance, or U-value, varies based on the product and its thickness. Products like WARM-R SD E Grey EWB offer excellent thermal insulation by reflecting and absorbing radiant heat, while Stonewool EWI provides consistent thermal resistance over time.

How long does external wall insulation last?

When properly installed and maintained, external wall insulation can last the lifetime of the building.

Is external wall insulation suitable for all types of buildings?

While it suits many building types, certain properties, especially historic or listed buildings, may have restrictions. Always check local building regulations and consult with professionals before installation.

How does external wall insulation affect internal space?

One key benefit of external wall insulation is that it doesn’t reduce interior space. Unlike internal wall insulation, it is applied to the outside, preserving the building’s internal dimensions.

Does external wall insulation protect against moisture?

Yes, when properly installed, external wall insulation can help prevent moisture penetration and condensation

Can I retrofit external wall insulation to an existing building?

Yes, external wall insulation is often retrofitted to existing buildings to improve energy efficiency and doesn’t require significant interior renovation.

Will external wall insulation increase my property value?

Yes, improved energy efficiency can enhance property value. Homes and buildings with better insulation are more appealing to buyers and can lead to reduced energy bills, making them more cost-effective over time.

How do I maintain external wall insulation?

Maintenance is minimal but involves occasional checks for damage, cracks, or gaps that could allow moisture to penetrate. The external surface should also be cleaned periodically to remove dirt, algae, or moss that may accumulate.

Is external wall insulation environmentally friendly?

Yes, it can be an eco-friendly choice. Reducing energy consumption lowers carbon emissions.

How long does it take to install external wall insulation?

The duration of installation depends on the building’s size and complexity. Professional installers can provide a more precise timeframe based on your project.

Can external wall insulation be combined with other insulation solutions?

Yes, it may be used with roof, floor, or internal wall insulation to create a comprehensive thermal envelope that maximises energy efficiency throughout the building.

How much energy savings can I expect from external wall insulation?

Energy savings depend on the building’s insulation levels and the chosen product. External wall insulation can significantly reduce heat loss, leading to lower energy bills and improved thermal comfort. A professional energy assessment can help estimate potential savings.

Are there any grants or incentives for installing external wall insulation?

In some regions, grants, rebates, or incentives may encourage homeowners and businesses to improve energy efficiency through insulation. Check with local authorities or energy providers for available programmes.

Talk to our Renovation Technical Team

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Roof Insulation

What is roof insulation, and why is it important?

Roof insulation helps to reduce heat loss through a building’s roof, maintaining a consistent temperature inside. It improves energy efficiency, lowers heating costs, and reduces carbon emissions.

What roof insulation products are available?

We offer a range of products:

  • XT/WALK-R (Insulated Loft Decking): Combines PIR insulation with OSB board for safe access and high insulation values

  • RAFTERLOC: Variable width pitched roof board ideal for tight fitting between rafters.

  • XT/PR_UF & XO/PR (Pitched Roof): High-efficiency insulation solutions for sloped roofs with minimal intrusion into living spaces.

  • FR/ALU (Flat Roof): Polyisocyanurate insulation suitable for flat roofs with vapour-resistant aluminium facings.

Accordion What are the benefits of insulating pitched roofs?

Insulating pitched roofs reduces heat loss, prevents condensation, and ensures the home stays warm in winter and cool in summer. Products like XT/PR_UF and XO/PR are designed for optimal thermal performance.

What is the difference between loft decking and pitched roof insulation?

  • Loft Decking (XT/WALK-R): This insulation provides safe access to utilities, like water tanks, in the loft area.

Is roof insulation suitable for both new builds and renovations?

Yes, our roof insulation products are suitable for new builds and retrofits, ensuring improved energy efficiency and compliance with modern building standards.

Talk to our Renovation Technical Team

Speak to Experts – Our technical experts are here to advise you on the best insulation approach for you and your home.

Speak to an Expert

Framing Insulation

What is framing insulation, and how does it work?

Framing insulation is designed for use within steel and timber frame constructions. It can be fitted between studs or used as a sheathing board, providing a thermal barrier that reduces heat loss and improves energy efficiency.

What framing insulation products are available?

We offer:

  • XO/FB (Steel & Timber Frame): High-performance XtroLiner framing board suitable for use within steel and timber frame systems.

What are the benefits of using XO/FB framing boards?

XO/FB provides high compressive strength, low thermal conductivity, and is lightweight, making it easy to install. It also ensures better thermal performance or reduced insulation thickness, making it ideal for renovations up to 18 metres in height.

Is framing insulation suitable for renovation projects?

Yes, XO/FB framing boards can be used in both new construction and renovation projects, helping to enhance the thermal efficiency of existing buildings.

Talk to our Renovation Technical Team

Speak to Experts – Our technical experts are here to advise you on the best insulation approach for you and your home.

Speak to an Expert

Internal Wall Insulation

What is internal wall insulation, and why should I consider it?

Internal wall insulation also known as drylining, thermal laminates or thermal lining improves a building’s energy efficiency by adding a thermal barrier to the inside of the walls. This helps maintain a comfortable indoor environment and reduces heating costs.

What products are available for internal wall insulation?

drylining, thermal laminates or thermal lining


Our range includes:

  • XT/TL (Drylining with Adhesive Dabs): Combines Unilin PIR insulation with plasterboard, fixed with adhesive for easy installation.

  • XT/TL-MF (Mechanically Fixed): Suitable for internal walls and sloped roofs, mechanically fixed for secure placement.

  • SR/TBFL-MF (Fireline Thermal Laminate): High-performance insulation with a Euroclass B fire rating.

What are the benefits of using thermal liners for internal walls?

Thermal liners like XT/TL and XT/TL-MF provide insulation and drylining in one application, reducing the need for separate installations. They are suitable for various wall types, especially when interior space isn’t restricted.

Can internal wall insulation reduce condensation?

Yes, products like SR/TBFL-MF are designed to reduce the risk of condensation, helping to prevent moisture-related problems in your home.

How do I choose between adhesive dab and mechanically fixed thermal liners?

  • Adhesive Dab (XT/TL): Best for plumb, even walls where installation speed is important

  • Mechanically Fixed (XT/TL-MF): Ideal for older, uneven walls that need a secure, long-lasting solution.

  • Note: When upgrading existing properties, a professional should be engaged to assess the property for appropriate insulation treatments and effective detailing. Walls should be dry and decoration stripped back to the wall substrate. Appropriate ventilation strategies must be considered as part of the overall energy upgrade.

Talk to our Renovation Technical Team

Speak to Experts – Our technical experts are here to advise you on the best insulation approach for you and your home.

Speak to an Expert

Floor Insulation

What is floor insulation, and why is it necessary?

Floor insulation reduces heat loss through a building’s floors, helping to keep rooms warmer and more energy efficient. It also prevents moisture problems and mould growth.

What floor insulation products do you offer?

Our floor insulation solutions includes:

  • XT/PR_UF (Ground Supported & Suspended Floors): Lightweight PIR insulation with high compressive strength for underfloor heating applications.

  • XO/UF (Solid & Suspended Floors): Superior performance PIR with a low thermal conductivity of 0.021 W/mK.

What are the benefits of insulating floors with XT/PR_UF or XO/UF?

Both products provide high insulation values, are lightweight, and are easy to install. They improve floors’ U-value and are suitable for underfloor heating systems, ensuring even warmth distribution.

Can floor insulation be used in renovations?

Yes, products like XO/UF are perfect for retrofitting older buildings and improving thermal performance

How does floor insulation help with underfloor heating?

By combining insulation and underfloor heating, products like XT/PR_UF and XO/UF ensure efficient heat distribution, reducing energy usage and keeping your home comfortable.

What types of floors can be insulated?

Our solutions suit solid and suspended floors, including ground-supported slabs, timber floors, and more. They can also be used in new construction or renovation projects.

Talk to our Renovation Technical Team

Speak to Experts – Our technical experts are here to advise you on the best insulation approach for you and your home.

Speak to an Expert

Renovation and Insulation Solutions

Why is insulation important during a renovation project?

Insulation improves energy efficiency, maintaining a comfortable indoor environment, and reducing heating and cooling costs. Proper insulation can also increase the value of your property.

What are the benefits of choosing Unilin Insulation for my renovation?

Unilin Insulation offers a wide range of high-quality products for different areas of your home, along with technical advice to help you choose the best solutions for your specific needs. Their products are designed to improve energy efficiency, comfort, and sustainability.

What areas of my home should I consider insulating during a renovation?

Key areas to focus on include:

  • External Walls: Prevents heat loss and improves energy efficiency.

  • Internal Walls: Helps maintain consistent indoor temperatures and can reduce noise

  • Roofs: Up to 30% of heat can be lost through poorly insulated roofs.

  • Floors: Insulating floors can prevent heat loss and moisture problems.

How much heat can be lost through poorly insulated building parts?

  • Up to 30% through roofs

  • Up to 30% through walls

  • Up to 10% through floors

What is the ‘whole house’ approach to renovation?

The whole-house approach considers the entire home, ensuring that each renovation phase is planned to complement future improvements. This method maximises energy efficiency, reduces costs, and minimises the risk of disruptions.

How does the ‘whole house’ approach compare to a piecemeal approach?

A piecemeal approach may lead to incomplete energy savings, obstruct future improvements, and potentially damage the structure or pose health risks. The whole-house approach, on the other hand, ensures that all renovations work together for maximum benefits.

Can I get financial assistance for my renovation project?

Yes, grants are often available for energy-efficient renovations. Adopting a whole house approach can help you qualify for maximum financial assistance. Visit resources like seai.ie for more information on available grants.

How does insulation improve my home’s energy efficiency?

Insulation reduces heat transfer, helping to maintain consistent temperatures throughout your home. This lowers energy consumption, reducing heating and cooling costs and a smaller carbon footprint.

What are the benefits of external wall insulation?

External wall insulation improves a building’s thermal performance without reducing interior space. It also enhances weatherproofing, reduces moisture penetration, and can improve a home’s exterior appearance

Can I retrofit insulation into an existing home?

Yes, retrofitting insulation into an existing home is possible. It is a practical way to upgrade the energy efficiency of older buildings, and solutions are available for walls, roofs, floors, and framing.

What does Unilin offer the different types of insulation products?

Unilin offers various products including:

  • External Wall Insulation: WARM-R SD E Grey EWB, Stonewool EWI.

  • Internal Wall Insulation: Thermal liners like XT/TL, SR/TBFL-MF.

  • Roof Insulation: Products like RAFTERLOC and FR/ALU.

  • Floor Insulation: XO/UF and XT/PR_UF.

How can insulation help reduce energy bills?

Good quality insulation minimises heat loss, so your heating and cooling systems don’t need to work as hard. This results in lower energy consumption and reduced utility bills.

What should I consider when planning insulation for a renovation?

Consider the following

  • Areas of heat loss – Identify where most energy is lost (walls, roofs, floors).

  • Budget – Plan for short and long-term savings.

  • Grant eligibility – Check for any available incentives or rebates.

  • Professional advice – Consult with energy assessors or insulation experts to choose the right products.

How does Unilin Insulation support sustainable living?

Unilin’s insulation products help reduce energy consumption, directly contributing to lower carbon emissions. They are also designed with sustainability in mind, supporting a healthier and more sustainable living environment.

What is the C02 Saving Tier?

CO2 Saving Tiers categorise the amount of carbon dioxide reduction achieved through different insulation measures. Higher savings tiers indicate more significant reductions in carbon emissions, contributing to environmental sustainability.

What are the capital cost tiers for insulation upgrades?

Capital cost tiers provide an indicative range of costs for different renovation measures:

  • <250: Small-scale improvements like energy-efficient lighting.

  • <2500: Mid-range renovations such as basic insulation upgrades.

  • <7500: Extensive insulation projects for multiple areas of the home.

  • 7500+: Comprehensive whole house renovations.

Why should I consult an energy assessor for my renovation project?

An energy assessor can evaluate your home’s energy performance, suggest suitable insulation measures, and help plan a whole house renovation that maximises efficiency and long-term savings.

How can I maximise comfort and warmth in my home through insulation?

By insulating key areas such as external walls, roofs, floors, and internal walls, you can significantly reduce heat loss, maintain a consistent indoor temperature, and create a more comfortable living environment year-round.

Talk to our Renovation Technical Team

Speak to Experts – Our technical experts are here to advise you on the best insulation approach for you and your home.

Speak to an Expert

Renovation Support and Services

How can Unilin Insulation help me achieve my renovation goals?

Unilin Insulation offers expert guidance on the best insulation solutions for your project. Whether you’re upgrading part or all of your home insulation, their technical team provides personalised advice to help you choose the most effective and efficient insulation options.

What is included in the free consultation service?

The free consultation service connects you with Unilin technical experts who provide one-to-one advice on insulation solutions, guiding you through the process to ensure your home renovation meets your energy efficiency goals.

How can I book a free one-to-one consultation?

You can contact Unilin Insulation directly to schedule a free consultation. During the consultation, their experts will discuss your specific needs and recommend the best insulation options for your renovation.

What technical support services does Unilin Insulation offer?

Unilin Insulation provides a range of services including

  • Certified U-value calculations and condensation risk analysis

  • Fabric performance specifications for ‘A’ rated buildings.

  • Pre-design assessments and Y-value performance checks

  • Pre-tender specification checks.

What is a U-value calculation, and why is it important?

A U-value calculation measures the rate of heat transfer through a building element (e.g., wall, roof, floor). Lower U-values indicate better insulation performance. Accurate U-value calculations help in choosing the right insulation to enhance energy efficiency.

What is a BER/SAP calculation?

BER (Building Energy Rating) and SAP (Standard Assessment Procedure) calculations assess the energy efficiency of a home. Unilin offers consultations to help you understand how your insulation choices impact your home’s energy rating.

How can Unilin Insulation help me achieve an ‘A’ rated building?

Our technical team provides fabric performance specifications and design advice to ensure that your building meets high energy efficiency standards, which can contribute to an ‘A’ energy rating.

What does the pre-design assessment service include?

Pre-design assessments involve evaluating your renovation plans to identify opportunities for improving insulation performance. This ensures that all design elements work together for optimal energy efficiency.

Why should I choose Unilin Insulation for my renovation project?

Unilin Insulation offers a comprehensive range of solutions tailored to different applications and budgets. Their expert advice, combined with a strong focus on energy efficiency, helps you achieve the best results for your renovation.

Can Unilin Insulation help with installation?

Yes, they offer installation training and an installation validation process to ensure that insulation is properly installed, maximising its performance and longevity.

What types of projects does Unilin Insulation support?

Unilin Insulation provides prompt technical support for projects of all sizes, from small home upgrades to large-scale renovations, ensuring all customers receive the best possible service.

How does Unilin ensure compliance with building regulations?

Their technical team checks project specifications against relevant building standards, ensuring compliance and supporting you in achieving the desired insulation performance.

How can Unilin Insulation help during the tendering process?

Their pre-tender insulation specification checks ensure that all details are correct, helping you avoid costly mistakes and ensuring the chosen solutions align with your project’s requirements.

Is there support for planning renovations in new builds and existing homes?

Yes, Unilin provides support for both new build and renovation projects. They offer pre-design assessments to help plan efficient insulation solutions from the ground up.

What benefits does improved insulation bring to my home renovation?

Better insulation improves energy efficiency, reduces heating and cooling costs, minimises the risk of condensation and mould, and enhances overall comfort. It also contributes to a higher property value and supports a more sustainable living environment.

How soon can I expect a response from the technical team?

Unilin Insulation commits to providing prompt responses, ensuring that your project moves forward without delays. Regardless of the project size, you can expect timely and effective advice.

Can Unilin’s technical team assist with energy grants?

While Unilin Insulation doesn’t directly offer grants, their technical team can help you navigate the requirements and benefits of energy efficiency grants, guiding you on how to maximise financial assistance for your insulation upgrades.

Are there insulation solutions for all budgets?

Yes, Unilin Insulation provides various insulation products designed to meet budget requirements, from basic upgrades to comprehensive energy-efficient renovations.

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