Attic Insulation Cost Ireland

Standard attic insulation in Ireland costs between €800 and €2,400 before grants. After applying the SEAI attic insulation grant of €1,100 to €2,000, the net cost to homeowners ranges from €100 to €400.

Up to 30 percent of a home's heat escapes through an uninsulated roof. By installing a 300mm barrier, you trap that heat inside your living spaces. This makes attic insulation the most cost effective energy upgrade you can perform.

What Drives the Price of Attic Insulation?

While house type gives a general baseline, your actual contractor quote will be tailored to the specific conditions of your attic space. Several key factors influence the final invoice.

• Attic Size and Layout: Insulation is priced and installed per square metre. A standard three bedroom semi detached house has a roof footprint of approximately 50 to 60 square metres.
• Insulation Material Choice: Glass fiber or mineral wool rolls are laid between and across joists to reach the recommended 300mm depth. Rockwool provides superior acoustic performance but costs more. Rigid PIR boards are required if you need storage space or wish to insulate between rafters.
• Preparation and Ventilation: Contractors must install rafter baffles at the eaves to maintain airflow and prevent condensation. They also need to insulate and seal the attic hatch, lift existing floorboards, lag cold water tanks, and wrap exposed pipes.
• Storage Walkways: Compressing insulation destroys its properties. Contractors must construct a raised timber walkway or install joist legs to support new floorboards. This platform adds €200 to €500.