How Much Does External Solid Wall Insulation Cost

External solid wall insulation is a popular way to improve the energy efficiency of older homes and buildings with solid walls. It helps reduce heat loss and can significantly lower your energy bills. Generally, EPS insulation boards cost between €50 and €70 per square meter. However, there is more to this.

Let’s discuss how much it costs to add external solid wall insulation to your house. We’ll explain the factors that affect the price so you know what to expect.

Types of External Solid Wall Insulation Materials

The first factor that influences the cost is the type of insulation material you choose. The most common options are:

  1. Expanded Polystyrene (EPS): EPS is a lightweight, cost-effective insulation material made from plastic. It offers good thermal performance and is so easy to install.
  1. Mineral Wool: This insulation is made from natural materials like rocks and minerals. It’s fire-resistant, durable, and provides excellent insulation properties.
  1. Phenolic Foam: Phenolic foam is a high-density insulation material known for its superior thermal performance. It’s more expensive than EPS but can be a good choice for properties with limited space.
  1. Polyisocyanurate (PIR): PIR insulation boards offer excellent thermal resistance and are often used in commercial and industrial applications.

In this blog we discuss whether this sort of insulation is worth the cost?

Factors Affecting the Cost of External Solid Wall Insulation

Several other factors can impact the overall cost of your external solid wall insulation project beyond the insulation material.

Wall Area

The larger the wall area you need to insulate, the higher the cost. EPS insulation boards can cost between €50 and €70 per square meter, while more premium options like PIR insulation may range from €80 to €150 per square meter – all of this depends on the thickness of the insultation.

Most contractors will provide a quote based on the cost per square meter so take into account the total wall area of your property.

Property Type

The type of property you own will also affect the cost. External insulation can cost €12,000-€18,000 on average for a typical 3-bedroom semi-detached house. Flats and apartments can be more challenging and may require specialized equipment which can increase the cost.

Wall Condition and Preparation

If your outside walls are bad with cracks or old stuff that has to come off, you’ll need to think about how much it costs to get them ready. These additional steps can add significant expenses to your project.

Scaffolding Requirements

You may need to hire scaffolding to enable the safe installation of the external insulation depending on the height and accessibility of your property. The cost of scaffolding can vary based on the duration of hire and the complexity of the setup.

Rendering or Cladding System

Once the insulation boards are installed, you’ll need to choose a rendering or cladding system to protect the insulation and give your property a finished look. The cost of these systems can vary widely depending on the materials and finishes you select.

Location and Labor Costs

Labour costs can vary significantly depending on where you live. In urban areas with a higher cost of living, you can expect to pay more for labor than in rural areas.

As you can see, the combination of materials, specialized labor, scaffolding needs, rendering systems and other factors make external solid wall insulation generally an expensive home improvement project.

Additional Costs to Consider

Beyond the core costs of materials, labor, and scaffolding, there are a few additional expenses you should factor in:

  1. Fees for planning permission and building regulations: you may need to obtain planning permission and comply with building regulations depending on your location and the extent of the word which can incur fees.
  1. Costs for replacing windows and doors: If your existing windows and doors are not compatible with the new insulation system, you may need to replace them which adds to the overall cost.
  1. Costs for ventilation systems:  You may need to install additional ventilation systems to maintain proper air flow in your home.
  1. Maintenance and repair costs: External insulation systems require regular maintenance and may need occasional repairs which can add to the long-term costs.

Hiring a Contractor for External Solid Wall Insulation

It’s generally recommended to hire a reputable and experienced contractor for external solid wall insulation installation unless you have extensive experience with construction and insulation projects. Here is a guide for picking the right contractor:

  1. Get multiple quotes: You don’t need to settle for the first quote you receive. Get quotes from at least three different contractors and compare their prices and services.
  1. Check credentials and references: Make sure the contractor you hire is properly licensed, insured, and has experience with external insulation projects. Ask for references from their previous clients and review their work.
  1. Ask questions: Don’t hesitate to ask questions about the materials, process, and timeline. A good contractor should be able to explain everything clearly and address your concerns.

Final Words

Determining the cost of external solid wall insulation is not a straightforward task as numerous variables come into play. You need savvy decision-making and careful planning.

So call an expert for a better estimation. Don’t hesitate to have open discussions with contractors about the most cost-effective approaches for your home.

At the end of the day, getting external solid wall insulation is about more than just spending money. It’s about making your home more comfortable and saving energy. 

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