Improving the insulation on a home is one of the best ways to improve its energy efficiency, with the potential to drastically reduce its heating bills and carbon footprint, all while making it a more comfortable place to live.

There are many different ways to improve the insulation of your home, at the attic and roof level, in the walls, and beneath the floors, all of which can dramatically reduce the heat loss from the building fabric.

The SEAI offers many grants which can help homeowners with the cost of installing new insulation, making it these essential home upgrades more affordable and accisble for all.

We can guide you through the many different insulation options available today, the different materials they may use, and things to look for when seeking a good installer in your area.

Home insulation

Home Insulation Grants 2025

SEAI grants can save homeowners thousands of euro on insulation costs

Best Methods for Home Insulation

There are many ways to insulate your home. But which are the most cost effective in 2025?

Choosing an Insulation Installer

Home insulation can cost thousands of euro and is meant to keep your home warm for decades to come. That’s why it’s important to have a reliable installer for the job.

Getting poorly installed insulation can leave you without any of the intended benefits, and cost even more money to get the job fixed.

That’s why it’s important to take the time to select a reputable installer.

  • Excellent customer reviews

  • Lengthy Experience and Project History

  • SEAI Accredited Installers

Avoid cowboy builders and enjoy peace of mind that your new insulation will be keeping you cosy for years to come.

Installing Attic Insulation

Lower Heating
Costs

A properly insulated home can spend up to 45% less on their heating

Increase Property Values

Adding insulation to a home can significantly increase the property’s value

Reduced Carbon Footprint

Less oil or gas used for home heating is good for the environment

Warmer Home in Winter

Keep your home warmer with less effort during the cold winter months

Helps to Protect Homes

Some insulation can add protection from damp and the weather

Speak with an Insulation Specialist

Take our 90-second insulation assessment. It only takes 90 seconds and it’s 100% cost and commitment free.

Different Types of Home Insulation

There are many ways to insulate a home, which have different levels of cost and benefit in terms of improved thermal performance, level of work required, and their price tag. The main areas of home insulation are:

Attic Insulation

  • Up to 30% of a home’s heat can be lost through the roof.

  • Attics can be insulated at the rafter or loft level.

  • Attic Grant – Max €1,500 / Rafter Grant – Max €3,000

Cavity Wall Insulation

  • Up to 35% of a home’s heat can be lost through its walls.

  • Silicon bead insulation is pumped into the cavity space of a wall.

  • Grant of up to €1,700 available.

External Wall Insulation

  • Homes can lose up to 35% of their heat through their walls.

  • Insulation is fixed to the exterior of the home, with a cladding on top.

  • Up to €8,000 grant available.

Internal Wall Insulation

  • Insulation boards are fixed to the interior surface of the wall.

  • Homes can lose up to 35% of their heat through the walls.

  • Up to €4,500 grant available.

Floor Insulation

  • Up to 10% of a home’s heat can be lost through the floor.

  • Insulation can go on solid or suspended timber floors.

  • €3,500 SEAI grant available.

Home Insulation Guides

Insulation Materials

The type of insulation which will be used in your home depends on the area of the house which is being worked on, and can also depend on how much you are willing to spend on the quality of materials.

The most common and easiest to apply type of attic insulation. Rolled Wool insulation consists of layers of glass wool (fibreglass), wood wool, rock wool, or sheep’s wool which is rolled out, as the name suggests. Different materials will have different levels of thermal conductivity. 

Fibreglass and Rock wool also have the advantage of being very fire-resistant.

The most important factors to take into consideration are the density of the material being used and the thickness of the layers being set down. Both of which will affect how much insulation is provided.

An environmentally friendly, efficient and cost-effective method of insulation, Cellulose is made of recycled paper products which are cut down into tiny fragments and then made into a fibrous material which can be blown into small spaces.

The advantages of cellulose insulation include that it can be used over flat surfaces, but also in small spaces and niches to ensure complete protection with no gaps or air pockets.

Polyurethane is a sprayable foam that is excellent for insulating areas with lots of small spaces or otherwise in hard-to-reach areas such as attics or cavity walls.

Easily usable in new or old buildings, polyurethane is also completely airtight and has excellent thermal performance minimising heat loss. The water-resistant seal provided by the spray foam insulation also protects from rain and dampness. Spray Foam insulation will also expand as it dries and hardens, filling every crevice.

Polystyrene Insulation is a type of thermoplastic foam which comes in the shape of rigid boards. This is popular as a form of insulation due to its adaptability, ease of application, and excellent protection against heat loss and noise.

Different from regular polystyrene boards, Bonded Bead or Cavity Bead insulation consists of small beads of polystyrene which are injected into the cavity space in a wall together with an adhesive bonding agent.

The small nature of the individual beads allows them to fill the entirety of an inaccessible space, and fill it with a solid mass once the adhesive sets.

Home Insulation Quiz

Speak with a member of our team and determine the type of insulation that best suits your home.

  • Take our insulation assessment

  • You will receive a callback

  • We will send across your insulation quotes

FAQs

Depending on the scale and location of the proposed works, along with the nature of the property planning permission may be required to have insulation installed. This may be the case if carrying out external works on the house; if it is a protected structure; or located in an architectural conservation area.

While it is of course possible to buy all the materials and equipment required for a DIY job, installing insulation yourself can have severe consequences if done incorrectly. Not only may you not get the desired benefits, but you could also end up damaging your home.

Fibreglass or cellulose insulation should probably be inspected after 15 years or so, at which point it may be replaced. However other materials such as mineral wool, polystyrene boards, or spray foam can be good for up to 100 years if installed correctly.

Get in Touch

Get in touch to hear more about how Home Insulation can improve your home life today. Speak with the experts to get a recommendation and quote on what home improvements will suit you best. 

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Home Insulation Saves Households Thousands In Heating Costs

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