SEAI Wall Insulation Information SheetQuality External Wall Insulation

External Wall Insulation is an effective means by reducing heat loss from your home or commercial property.

You can create a warmer and greener home by insulating your external walls in a established process which incorporates applying an external render waterproofing and coloured finished exterior surface.

Insulating your home from the outside has many advantages over internal insulation, for example - cutting thermal bridges. The highest level of Home Energy Saving Grant, €4,000, is available for external wall insulation.

The External Insulation Process is widely used in northern Europe and is quickly becoming established in Ireland since the introduction of the Home Energy Saving Grant. (see www.sei.ie for more information)

External Wall Insulation Information from - SEI pdfAbout the External Wall Insulation Process

  • Fixing insulation material, expanded polystyrene slabs or mineral wool, to outer surface
  • A cement-based weather resistant render is applied over the insulation
  • The render is strengthened with the addition of steel ot fibreglass mesh, which also increases impact resistance.
  • A thin layer of render can be applied to minimise thermal bridging at windows and doors.
  • Problems (other than poor levels of insulation) suffered by some homes such as rain penetration, poor airtightness or frost damage can be solved by an external insulation system.
  • Expanded Polystyrene Insulation systems are an effective and economical alternative to other technologies such as fibre glass or mineral wool.

Features and benefits of Insulated renders

  • SEI Insulating your home - information bookletA new generation of external wall insulation systems using specially designed one coat render, which provide efficient thermal insulation both to new projects and to existing houses which are retrofitted
  • Comprehensive range of colours and textures which are visually striking
  • High performance water shedding range of finishes to protect the building
  • Eliminates interstitial condensation by creating a warm wall construction
  • Increased energy efficiency for householders leading to economic benefits

Insulating Your Home

The SEI have identified three main types of wall insulation, which suit different walls and homes:

  • Cavity wall insulation - not suitable for homes with solid wall or hollow block construction methods
  • Internal Wall Insulation
  • External Wall insulation

Internal Wall Insulation

Internal Wall Insulation Information from - SEI pdfIn relation to internal wall insulation the following extract is from the Wall Insulation Homeowner Information provided by SEI and available on the SEI web site. It is copied here for your convenience...

"Internal insulation (sometimes referred to as 'dry-lining') involves fixing insulation to the inner surfaces of your external walls. This usually involves fixing an insulation board to the walls and covering it with a vapour barrier layer and plasterboard. One of the main disadvantages of internal insulation is the loss of room space; this may be minimised by using high performance insulation products that are thinner. While this is often a more affordable option than installing external wall insulation, the loss of space and potential necessity to take out and re-fit fitted kitchens and appliances can result in people choosing the external insulation option."

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