What is Spray Foam Attic Insulation?

Spray Foam Attic Insulation

Air moves in and out of a home through every hole, crack, and crevice. Air exchange in and out of a home is a common cause of high energy bills. An advanced insulation system like ENERTITE® spray foam can rectify this problem. Spray foam insulation expands in just 5 seconds and seals the building envelope to stop warm indoor air from escaping and prevent cold outdoor air from entering.

ENERTITE® spray foam is environmentally friendly – it is made out of a low density polyurethane foam that is applied as a liquid through the use of zero ozone depleting technology.  Neither does it emit unhealthy VOCs.

By properly sealing your home, you reduce the amount of energy that is required for heating and therefore reduce carbon emissions. ENERTITE® provides a sealed thermal and airtight layer, with near zero air permeability, eliminating heat loss, drafts and noise pollution, creating a comfortable and healthier indoor environment.

There is no need to worry about mould formation as the spray foam allows your attic to breathe and prevents moisture build up and humidity.

Some types of attic insulation are required to have a thickness of 270mm, which reduces valuable attic space. By using spray foam insulation, you can get high performing insulation, with a thinner layer of spray foam than earthwool, for example, while still increasing R-value, warming up your home and reducing carbon emissions.

This makes spray foam perfect for attic spaces and basements where space is at a premium. 

In some cases, people opt to have retrofit roof insulation, where the foam is inserted from the outside – for more information, please visit our Retrofit Roof Insulation page.

View Technical Information Book a Free Consultation


ENERTITE® is installed by our trained team to ensure that installation is carried out in line with the appropriate insulation and ventilation regulation requirements.

All you need to do in advance is clear out the attic space where we’ll be spray foaming.  First of all, we will open all windows while we spray to ensure any odours will escape.  Then we install card and roof ventilation to ensure that your spray foam is breathable.  There is only a small bit of noise and we’ll ensure to cover the floor with plastic sheeting to avoid mess, and we always clean up after ourselves.  Most attics are complete in 1-2 days.

Spray foam insulation is hypoallergenic and completely inert when installed.  There is no maintenance required and one application should last the entire life time of the building.

Best of all, you’ll feel the difference overnight in the warmth of your house.

Watch Our Videos

Technical Information

ENERTITE® open cell spray foam insulation is a water blown polyurethane foam with a thermal conductivity of 0.037 W/mk. It can be installed as an independent product to achieve regulatory U-Values and airtightness requirements in most construction buildups. It provides a cost effective, fully breathable insulation solution.


ENERTITE® can be installed between rafters to the required thickness in order to provide a particular level of insulation or U-Value. The open cell spray foam can be sprayed proud of the roof rafter to the desired thickness or can be cut flush with the adjacent timbers to allow for plasterboard fixing.

As with all insulation types ENERTITE® can be applied to breathable roofing felts when a counter batten is present above the felt and below the tile / slate batten in accordance with Irish and UK Building Regulations. This allows for the necessary ventilation layer above the vapour permeable roofing felt. In circumstances where the roof is not “counter-battened” it is necessary to install rafter slide to the underside of the felt. This effectively provides a separation layer between the foam and felt to allow for ventilation as required by regulation.

Back to Top

Contact Us Today

    Collection & Use of Personal Information

    By submitting your data, you are providing us with some level of personal information. This information is not stored on our website database. However, in order to respond to your enquiry, your data is emailed to our website’s email address where it is saved. We do not pass your data on to any third parties.