Baumit - Choosing the Right External Wall Insulation System

Have you thought about adding external wall insulation (EWI) to your building? You've done the research to ensure the property is suitable for this and now you are ready to take the next step and decide on which EWI system is right for insulating your home.

Baumit has a few options to choose from, each with their own unique benefits to suit different projects depending on the type of building, the location, the substrate, and any project specifications.

Whether you are looking for flexibility and protection, or perhaps you are looking for an EWI system that offers excellent sound and fireproofing properties, Baumit has a system to suit all these needs, read on to find out more to help you with your decision making.

Insulation First

Before we dive in, let’s answer the question of what is the core component of an EWI system and why does this matter?

The core component of each Baumit external wall insulation system are the insulation boards which are rectangular boards available in various thicknesses and made from either EPS (expanded polystyrene), mineral wool, phenolic insulation or wood fibre. Each type of board has different properties, and this is what distinguishes the systems from each other. Which one is best for your project depends on the project brief and any legal requirements that need to be taken into account. Read on as we discuss the benefits and differences of each Baumit EWI system.

The classic solution – Baumit EWI EPS Insulation system

Consisting of EPS insulation boards, this is the most popular system because of its high thermal insulation property. EPS boards can achieve a good level of insulation at a smaller thickness than other insulation options, therefore a thinner layer of insulation is required to achieve the same thermal outcome. Most installers will also agree that these systems are easier and quicker to install reducing labour costs.

The all-rounder – Baumit EWI Mineral Wool System

This is a system for those with the requirement for excellent sound and fireproofing properties such as multi- story buildings, hospitals, schools, and local authority projects. The reason for this is because of the fire resistance property of Mineral Wool EWI Slab that is the insulation board for the system. Wood fibre insulation boards also have excellent sound proofing properties so the addition of Baumit Mineral Wool EWI system will also reduce any external noise from penetrating walls that were previously uninsulated. Lastly it is a breathable insulation therefore suitable for old stone houses.

The ecological alternative - Baumit EWI Wood Fibre Insulation System

This is the system for those who want to build with natural materials. The central component of this system is the Wood fibre insulation boards. As well as having good thermal insulation properties this system also improves sound insulation.

The performer – Baumit EWI Phenolic Insulation System

This system is ideal when space is a premium. This is the most performing insulating board on the market meaning you can achieve great levels of insulation with a thinner board.

Here is a summary of the key properties and benefits of each of the Baumit EWI Systems you can consider:

EPS EWI System

· NSAI approved system

· Flexibility and protection

· Offers a broad range of solutions

· Most economical insulant

· Most used type of insulation

Mineral wool EWI System

· NSAI approved system

· Fire resistant

· Highly permeable & Breathable

· Suitable for high rise building and stone building