External Wall Insulation in Castleknock
A certified insulated render system wrapped around the outside of the house, with the details around windows, eaves and sills done properly. Covering Castleknock village, Phoenix Park, Carpenterstown and the surrounding area.
External Wall Insulation for Castleknock homes
External insulation suits Castleknock homes where cavity fill is not possible or where a previous fill underperforms, and larger detached homes near the Phoenix Park with extensions of different construction. Planning is rarely an issue in the estates.
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 external wall insulation works
External wall insulation fixes insulation boards to the outside face of the walls and finishes them with a reinforced render system. Because the insulation is continuous around the house, it deals with the cold bridges at floors and party walls that internal insulation struggles with, and the work happens outside so you can stay living in the house.
Read the full guide to external wall insulation or, for extensions and whole-house retrofits in Castleknock, see MZCC.ie in Castleknock.
External Wall Insulation in Castleknock: questions
Do you carry out external 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 external 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 external wall insulation in Castleknock?
SEAI individual grants for external wall insulation are €8,000 for a detached house, €6,000 for a semi-detached or end-of-terrace, €3,500 for a mid-terrace and €3,000 for an apartment, for homes built and occupied before 2011. The whole wall surface must be treated. 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.
Does external wall insulation need planning permission?
Most external insulation is exempted development, but protected structures, Architectural Conservation Areas and changes that affect the look of a terrace can need planning. We check this at survey stage.
Will external insulation stop damp?
It keeps the wall warmer, which reduces condensation and mould on internal surfaces. Rising or penetrating damp has to be dealt with first, which is why we test the walls before specifying a system.
How long does an external wall insulation job take?
Five to ten working days for a typical semi-detached house, depending on weather. Render cannot be applied in rain or frost, so we plan around the forecast.
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.