Internal Wall Insulation FAQs

What is internal wall insulation?

It’s a retrofit method where insulation boards or a stud frame with insulation are installed on the inside of your home’s exterior walls. This adds thermal performance without altering the outside of the house.

Is it SEAI grant-approved?

Yes — internal wall insulation qualifies for grant funding if your home meets the criteria. We'll confirm eligibility during your free survey.

Will it make my rooms smaller?

A small amount of space is lost — usually 5–10cm off each insulated wall. We aim to minimise this while achieving the right insulation depth.

How disruptive is it?

There's some internal disruption — radiators, skirting boards, sockets and switches are temporarily removed and refitted. The rooms are then replastered or dry-lined and ready for painting.

How long does it take?

It depends on the number of rooms. One room may take a day or two. A full house typically takes several days, scheduled to minimise inconvenience.

Do I need to move furniture out?

Yes — furniture should be cleared from the walls being insulated. We’ll advise in advance and work room-by-room if needed.

Can I insulate just one wall or room?

Yes — we often insulate cold sitting rooms, bedrooms or north-facing walls as standalone jobs. It can be done in phases too.

What finishes are available?

Most internal wall systems are finished with plasterboard and a skim coat. Once dry, it’s ready for painting or decorating like any other wall.

Is it suitable for old homes or cottages?

Yes — internal insulation is a great option for solid wall homes and cottages where you want to keep the exterior look. We’ll assess ventilation and moisture management as part of the survey.

Can I get a BER after the work?

Yes — we can arrange for a BER assessment after the installation is complete to reflect your improved energy rating and submit documentation if a grant is involved.