What is a ventilation card?
Ensuring safe, effective spray foam insulation in your home.
The Role of Ventilation in Your Roof
When spray foam insulation is installed under a roof, proper ventilation is essential.
Without it, warm air rising from your home can meet the cold roof surface, creating condensation. Over time, trapped condensation can cause damp, mould, and even structural damage.
This is where a ventilation card comes in.
It is important that you know:
We always install ventilation cards when applying spray foam under roofs.
We follow Irish Building Regulations, ensuring the mandatory 50mm ventilation gap.
We use spray foam safely, so your home benefits from warmth, efficiency, and protection — without the risks.
What is a Ventilation Card?
A ventilation card is a rigid insert fitted between the spray foam insulation and the roof felt.
Maintain a 50mm air gap beneath the roof felt, as required by Irish Building Regulations.
Allow continuous airflow across the underside of the roof.
Prevent condensation build-up and moisture damage.
In short, the ventilation card acts as a safety net — ensuring your spray foam insulation performs effectively without compromising your roof.
Our Methodology
When we insulate your attic with spray foam:
Ventilation cards are fixed in place along the rafters.
A 50mm air gap is preserved between the card and the roof felt.
Spray foam is applied directly against the card, sealing your home while keeping airflow intact.
Should You Be Concerned? In Short, No!
If you choose Lovinsulation, the answer is simple: No.
We don’t just install spray foam — we install it correctly, ensuring your property is safe, comfortable, and efficient for decades to come.
Request A Quote Now
Upgrading your insulation could slash your heating bills and make your home more comfortable year-round. Fill out the form below for a free, no-obligation quote today.