With the heating on, a cold wall can make an Irish home a very miserable place. They can also refer to heat loss through the building fabric. For homeowners facing this problem, one solution to increase thermal performance without taking up living space within the home is external wall insulation Ireland. This is achieved by applying insulation to the outside of the external walls and finishing it with a protective coating. SEAI call this external wall insulation or 'the wrap'. The best answer depends on the construction of the property, its existing insulation, its condition, and its pattern of heat loss.

How Does External Insulation Compare With Cavity Insulation?

The two approaches improve wall insulation but work in different ways.

External Insulation Changes the Outside of the Wall

Insulation is applied externally on the external face of the wall.

This means that the floor area on the inside is usually not diminished.

If properly designed and implemented, it can also create a continuous coat around the outside walls.

The existing individual exterior wall insulation award from SEAI requires that external walls be properly insulated. Partial insulation of only one or two walls does not go under that program.

Cavity Insulation Uses the Existing Wall Cavity

Cavity wall insulation Ireland is applicable for houses with suitable cavity wall structure.

Insulation is inserted into the cavity and the exterior face is not insulated.

This can be less visually intrusive. But this is only appropriate if the wall construction and condition allow for the approach.

Could External Insulation Help With Heat Loss?

Improving wall insulation can reduce the amount of heat passing through the building fabric.

The Effect Depends on the Existing Wall

There is more room for improvement with a poorly insulated wall.

A wall that is currently doing a good job may not benefit from more work.

And that’s why a homeowner needs to know what they’re getting into before they go all-in on a significant retrofit.

Comfort Can Improve Alongside Efficiency

The goal is not only to reduce energy usage.

Warmer inside wall surfaces can make a room feel more pleasant.

The heating system may also have less work to do as the property holds onto heat more effectively.

When Does External Insulation Make Sense During Renovation?

Major renovation work can provide a practical opportunity to address external walls.

The Timing Can Reduce Disruption

Scaffolding and external finishing may be necessary for another job.

Mixing the right upgrades means you don’t need to return the same areas of the property down the line.

However, the insulation system still requires correct designing.

External Appearance Should Be Considered

The insulation alters the outside profile of the walls.

You might need to tweak the windows, doors, roof lines, gutters, vents and other elements.

Planning these details before the work starts can help avoid awkward finishes.

Could Better Wall Insulation Support Lower Temperature Heating?

Heating systems and insulation should be considered together.

Lower Heat Loss Can Change Heating Demand

Many of the conventional systems operate at higher water temperatures than low temperature heating systems.

This type of heating strategy can work better with a home that holds heat well.

SEAI says homes must be effectively insulated to reap the benefits of heat pumps.

Heat Distribution Still Needs Assessment

Better walls don’t mean all heating systems are okay.

Radiator output, floor heating, controls, room heat loss and system design are still important.

The heating upgrade should consequently be followed by a building survey.

What Should Homeowners Know About SEAI Support?

The current SEAI scheme includes support for wall insulation.

External Wall Insulation Has a Grant Route

The current SEAI reporting on fixed grants for external wall insulation is based on housing type. The biggest individual grant advertised is €8,000 for a separate dwelling. Other forms of habitation attract smaller amounts.

Heat Pump Funding Is Separate

Research on Ireland heat pump grants should separate out heat pump funds from wall insulation grants.

SEAI now offers a heat pump system grant that may cover the cost of the heat pump itself and some of the improvements to the central heating system. Depending on the type of dwelling and funding available, this can amount up to €12,500.

A homeowner should not assume that if they have received one grant they are inevitably eligible for another.

Heating Controls Have Their Own Scheme

The seai heating controls grant is for updating an existing heating system to smart controls.

SEAI now specifies a subsidy of €700 for qualifying installations of heating controls. It also notes this grant is separate from the heat pump system grant.

Please verify current circumstances before application.

Final Thoughts

Cold external walls are an indicator of a property that requires higher thermal performance, but they alone aren’t enough to decide the right renovation. If the house is suitable for the system, external wall insulation Ireland can reduce heat loss and improve comfort. Cavity wall insulation Ireland may be more suitable for a property with a suitable cavity. Homeowners should think about insulation before they convert to a heat pump or change their heating system. There is SEAI support available for wall insulation and this can help with eligible projects but the building itself should lead the selection. A comprehensive assessment can demonstrate if external insulation is the best approach to cold walls and heat loss.