Cavity Wall Insulation in Dublin
Bonded bead or mineral fibre injected into empty cavities, usually done in a day with no mess inside.
Most Irish houses built from the 1960s onwards have cavity walls: two leaves of block with a gap between. Many were built with the cavity empty or only partly filled, which lets heat escape straight through. Filling the cavity is one of the best value upgrades available.
We start with a borescope inspection through a small hole to check the cavity width, existing insulation and any debris or bridging. If the cavity is suitable we drill a pattern of small holes in the mortar joints, inject bonded polystyrene bead or mineral fibre until the cavity is full, and make good the holes to match. Vents and flues are sleeved so they keep working.
Not every wall is suitable. Very narrow cavities, walls exposed to severe driving rain, or cavities with rubble and mortar snots may need a different solution, and we will tell you if so.
Planning a bigger project, such as an extension or a whole-house retrofit? Our parent company MZCC.ie carries out building, carpentry and retrofit works.
Cavity Wall Insulation by area
How cavity wall insulation applies to the homes in each area we cover, from period red-bricks to modern estates.
Co. Dublin
- Cavity Wall Insulation in Sandyford
- Cavity Wall Insulation in Dundrum
- Cavity Wall Insulation in Clontarf
- Cavity Wall Insulation in Lucan
- Cavity Wall Insulation in Dún Laoghaire
- Cavity Wall Insulation in Malahide
- Cavity Wall Insulation in Ranelagh
- Cavity Wall Insulation in Rathfarnham
- Cavity Wall Insulation in Stillorgan
- Cavity Wall Insulation in Blackrock
- Cavity Wall Insulation in Foxrock
- Cavity Wall Insulation in Mount Merrion
- Cavity Wall Insulation in Goatstown
- Cavity Wall Insulation in Dublin 4
- Cavity Wall Insulation in Dublin 6
- Cavity Wall Insulation in Castleknock
Co. Kildare
Cavity Wall Insulation: common questions
How do I know if my walls have a cavity?
Most Dublin homes built from the 1960s on do. A borescope inspection through a small hole confirms the cavity width and whether there is any insulation in it already.
Can cavity insulation cause damp?
Problems come from filling unsuitable walls, such as very exposed elevations or cavities blocked with debris. That is why we inspect first and only fill walls that are suitable.
Is there any mess inside the house?
No. All drilling and injection is done from outside. Inside, the only change is that the walls feel warmer.
Related services
Thermal Imaging Surveys
Infrared surveys that show where your home loses heat, where insulation is missing, and where damp is likely.
Attic Insulation
Bringing the attic up to current depth with the details that keep it working: ventilation, hatch and services.
Airtightness Testing
Blower-door testing that measures how much heat your home leaks through gaps, and shows exactly where.
Book a free survey for cavity wall insulation.
Tell us about your home and we will arrange a visit, usually within a week. No obligation.