How to choose the best contractor for aluminium foil in Ireland
Aluminium Foil in Building Insulation (Radiant Barriers)
In residential construction, "aluminium foil" does not refer to kitchen foil, but rather to industrial-grade **foil-faced insulation boards** (PIR boards like Kingspan Therma or Recticel) and **multi-foil insulation blankets** (such as Actis or Superfoil).
These materials use a thin layer of highly reflective aluminium to block radiant heat transfer, helping homes meet strict Irish energy efficiency standards. However, because thermal performance relies on airtightness, choosing the right installer is crucial.
How Foil Insulation Works
Aluminium foil has low emissivity, meaning it reflects up to 95% of radiant heat back into the living space. When installed correctly with a static air gap, it prevents heat from escaping through the roof. Additionally, the foil layer acts as a complete vapor barrier, preventing damp internal air from condensing on cold rafters.
Vetting Foil Insulation Contractors in Ireland
When hiring an attic insulation or dry-lining contractor, verify these details:
- Metallic Tape Sealing: Ensure the installer uses heavy-duty, adhesive aluminium tape on all board seams and wall joints. Standard duct tape will degrade and peel, causing draft leaks.
- Ventilation Cards: If installing foil insulation between roof rafters, they must install rigid vent cards to maintain a mandatory 50mm ventilation gap behind the felt.
- SEAI Registration: Ensure the contractor is SEAI registered so you can claim attic insulation grants of up to €1,500.