Insulating homes all over Leinster


Cavity Wall Insulation

We are specialists in Cavity Wall Insulation in Leinster

What is Cavity Wall Insulation?

Cavity wall insulation is the insulation material that is installed into the cavity of a building, which is the space between the inner and outer wall. Cavity wall insulation traps the warm air in and prevents air from circulating around the cavity. By reducing heat loss through the cavity, you could save on your heating bills as well as your home having a better insulating performance.

The SEAI Home Energy Grants programme offers grants to help you improve the insulation of your home through the installation of attic or rafter insulation.

What Materials are Used?

KORE Fill Cavity Wall Insulation is Expanded Polystyrene (EPS) injected in bead form, along with a bonding agent, into a wall cavity to create an insulating mass

Thermal Conductivity: 0.033W/mK
Thickness: 200mm
U-Value: 0.15w/m2K

Are my walls Suitable?

Cavity wall insulation can be carried out in most houses built from 1930 onwards. A cavity wall consists of two 4” walls built side by side with a cavity between, held together by wall ties.

We can pump these cavities with high density bonded bead. Properties built from the 1980’s on would regularly have had insulation boards fitted. The remaining cavity can be pumped with bead to top this up.

Are you Certified Cavity Wall Insulators?

Powell Insulation Ltd. are SEAI & NSAI approved to install Korefill Diamond Bonded Bead which has the best insulation values for bead in the current market at an R-value of 0.033W/mK. Please see the NSAI agrèment cert attached.

Are your team Trained?

All Powell Insulation’s operatives are trained installers who have been approved by the manufacturers to install Kore diamond bead.

All of our work is audited both externally and internally to guarantee our quality remains at a premium level.

Are there SEAI Grants For Cavity Wall Insulation?

The SEAI offer grants of up to €1700 for cavity wall insulation in homes in Ireland. At Powell Insulation Ltd, we can guide you through the Cavity Wall Insulation Grants & help you apply today.

Is Wall Ventilation Important?

Without effective ventilation moisture can be trapped in the home and turn into condensation, particularly in the winter when surfaces such as walls are cold creating a due point.

The condensation can lead to damp and mould growth which can cause damage to your home and lead to respiratory illnesses for you and your family.

Benefits of Cavity Wall Insulation

Lower Energy Bills

Save up to 30% on heating bills this year!

Eco Friendly

Your home uses less fuel while staying the same temperature.

Cosy & Comfortable

Don't feel the chill this winter, cuddle up on the couch in warmth.

Energy Efficient

With less heat loss, your boiler doesn't work as hard to heat.

Higher BER Rating

Your home's BER rating will improve with better insulation

Moisture Control

Added insulation reduces dampness in your home.

Noise Reduction

Cavity Wall insulation adds a layer of sound proofing to your external walls.


With 1000's of happy customers, we guarantee a satifactory job for you.


Cavity Wall Insulation is a process that involves injecting insulating material into the gap between the inner and outer “skins” (walls) of a building to prevent heat loss.

Most modern houses, especially those built from the 1990s onwards, have cavity walls. They are characterized by two external brick walls with an air-gap between them.

The installation generally takes just one day, depending on the size of the house.

Yes, the SEAI offer a grant of up to €1700 for Cavity Wall Insulation

Cavity Wall Insulation can significantly reduce the amount of heat your home loses, helping keep it warm and drastically cutting down your heating bills.


Improper installation of insulation can lead to skin, eye, and respiratory irritation. Some insulation materials also pose fire hazards if incorrectly installed. That’s why hiring professionals ensures that installation is done safely and effectively.

Signs of under-insulation include fluctuating indoor temperatures, high energy bills, and walls that are cold to the touch in winter. If your home has these symptoms, it’s a good idea to get an insulation check-up.

It’s installed by drilling small holes in the external wall of your house, through which insulating material is injected. The holes are then filled to maintain the exterior appearance.