Internal Wall Insulation in Castleknock
Insulated dry-lining for homes where the outside cannot change, done with careful vapour and moisture control. Covering Castleknock village, Phoenix Park, Carpenterstown and the surrounding area.
Internal Wall Insulation for Castleknock homes
Castleknock's estate homes are mostly cavity-built and best served by cavity fill or external insulation, so internal insulation is used mainly room by room: converted garages, rooms over porches and extensions with thin walls, or rooms being renovated anyway. Larger homes near the Phoenix Park sometimes use it where external insulation would clash with stone or brick features.
How homes in Castleknock lose heat
The 1970s to 1990s estates were mostly built with cavity walls, some empty, some partly filled, and attic insulation well below current depth, which typically gives C3 to D2. Larger detached homes near the park have bigger roof and wall areas and often mixed-construction extensions.
Typical housing: Mid-century estate housing across the centre, larger detached homes near the Phoenix Park edge, and newer estates toward Carpenterstown.
Planning: Park-edge streets may carry some planning context; most estate homes allow external insulation as exempted development.
How internal wall insulation works
Internal wall insulation lines the inside face of external walls with insulated boards or a stud and insulation system, then replasters. It suits homes where the exterior has to stay as it is: red-brick period terraces, protected structures, Architectural Conservation Areas, or a single elevation that cannot be wrapped externally.
Read the full guide to internal wall insulation or, for extensions and whole-house retrofits in Castleknock, see MZCC.ie in Castleknock.
Internal Wall Insulation in Castleknock: questions
Do you carry out internal wall insulation in Castleknock?
Yes. We cover Castleknock and the surrounding Dublin area, including Castleknock village, Phoenix Park, Carpenterstown. Mid-century estate housing across the centre, larger detached homes near the Phoenix Park edge, and newer estates toward Carpenterstown.
Is planning permission an issue for internal wall insulation in Castleknock?
Park-edge streets may carry some planning context; most estate homes allow external insulation as exempted development. We check the planning position for your specific house at the free survey, before any work is specified.
Is there a grant for internal wall insulation in Castleknock?
SEAI individual grants for internal wall insulation (dry-lining) are €4,500 for a detached house, €3,500 for a semi-detached or end-of-terrace, €2,000 for a mid-terrace and €1,500 for an apartment, for homes built and occupied before 2011. Grant amounts are set nationally by SEAI and change from time to time, so check seai.ie before applying. We confirm what your home is likely to qualify for during the survey.
How much room space does internal insulation take?
Usually 60mm to 100mm off each external wall, depending on the system. On a typical room that is a small loss of floor area for a large gain in comfort.
Is internal insulation safe for solid brick walls?
It is when the system suits the wall. Solid brick needs moisture to be able to move, so we choose between breathable and vapour-closed systems after assessing the wall and detail the junctions carefully.
Can I live in the house during the work?
Yes, we work room by room so the rest of the house stays usable. Each room is out of use for one to two days.
Book a free survey in Castleknock.
We cover Castleknock and the surrounding area. Tell us about your home and we will arrange a visit, usually within a week.