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A sealed home is a warmer home

Why airtightness matters

Even the best insulation can underperform if your home is leaking warm air. Airtightness means sealing up unwanted drafts and hidden air gaps — in walls, ceilings, pipe penetrations, and around windows. This reduces heat loss, improves BER scores, and helps prepare your home for energy-efficient upgrades like heat pumps.

How we improve airtightness

  • Identify leakage points (cable gaps, pipe penetrations, attic hatches, etc.)
  • Install airtightness tapes, membranes and seals at key junctions
  • Box in service penetrations and seal reveals and joints
  • Carry out airtightness testing where required

We focus on high-impact areas — especially during insulation upgrades — to prevent warm air escaping and cold air sneaking in.

  • SEAI Retrofit Ready

    Airtightness is key for BER uplift and grant-funded upgrades

  • Clean Installation

    We install tapes, seals and vents with precision — no mess

  • Balances Airflow

    Ventilation systems added to keep fresh air moving and moisture out

Ventilation works with airtightness

Air in. Heat stays.

As your home becomes more airtight, it’s important to keep fresh air moving. We install natural and mechanical ventilation systems — from standard trickle vents to humidity-controlled extract fans and passive vents. Proper ventilation prevents condensation, mould and stuffy air in sealed homes.

What customers say

“We had Premier seal around our attic and windows — the drafts are gone and the heat stays in. The bathroom extractor is automatic and brilliant.”
— S. O’Reilly, Roscommon

“Airtightness testing showed air loss we didn’t know about. They sealed it up, fitted new vents, and our BER went up a full grade.”
— L. Timmons, Kildare

What’s included

  • Leakage point survey
  • Installation of airtightness tapes, membranes and grommets
  • Sealing of attic hatches, reveals, pipe and cable penetrations
  • Optional air-tightness test (pre- and post-install)
  • Ventilation installation — fans, trickle vents or passive systems

All works follow NSAI and SEAI guidance. Ventilation upgrades meet Part F regulations.

certification

Where we work

We offer airtightness and ventilation upgrades nationwide — as a standalone service or part of a full retrofit. From rural cottages to urban semis, we help homes seal in warmth without sacrificing air quality.

Part of a complete energy strategy

Airtightness matters most when it’s part of a bigger plan. We integrate it with attic insulation, wall upgrades, heating controls and solar — so everything works together. If you're preparing for a grant-backed retrofit, this is essential.

Seal the gaps — breathe easy

Book a survey today and we’ll assess where your home is leaking heat — and how to fix it with the right combination of airtightness and ventilation solutions.

Book Free Survey

Quick answers

What is airtightness in a retrofit?

It’s the process of sealing unintended air leaks around your home — typically in the attic, pipe gaps, reveals and junctions. It helps insulation perform properly.

Do I need ventilation if I make my home airtight?

Yes — ventilation is essential in airtight homes. We install passive or mechanical systems to prevent moisture build-up and keep indoor air fresh.

Can I get an SEAI grant for airtightness work?

Airtightness is part of grant-funded retrofits like the One Stop Shop. We include it in qualifying upgrades and complete all documentation required.

How do I know if my home is airtight?

We can perform an airtightness test (blower door test) or inspect leakage points visually. Most homes show signs of drafts, uneven temperatures or excessive ventilation heat loss.

Can airtightness improve my BER?

Yes — airtightness improvements reduce heat loss, which is a major factor in BER scores. We can advise what upgrades will have the biggest impact.