The main types of insulation for the roof and walls

Australian manufacturers offer many solutions for the insulation houses. How to choose insulation for the house, which can be called the best solution in a particular situation? It is necessary to start from the specifics of a construction material, its advantages and disadvantages.

Characteristics of individual types of insulation

The most popular among owners of suburban housing types of insulation:

  • Fibreglass & Mineral Wool
  • Expanded Polystyrene foam

One of the main reasons for their popularity is affordable price. Hovewer it's not just the price: each of these materials is characterized by a number of great characteristics.


Mineral wool insulation

Mineral wool - a popular insulator material, which is produced from metallurgical slag and silicate rock alloy.

There are several varieties of it:

  • lightweight wool with a density of no more than 90 kg/m3 - is used to protect frame-type structures
  • heavy density from 90 kg/m3 - usually placed on the contour of constructions
  • technical - it is not used in residential construction

Its purpose - insulation of industrial machines and equipment. Types of fiber structure: horizontal-layered; spatial (also corrugated); vertically layered. The advantages of mineral wool: excellent sound-insulating properties; low thermal conductivity; good tensile strength; hydrophobicity; chemical resistance. From other types of insulation for roofing mineral wool distinguishes resistance to deformation under the influence of temperature. That is, when severe frosts and dry summers change the shape of mineral wool slabs / mats does not happen. Places of application of the material: on the floor joists; floor slabs; framed walls; partitions; roofs.

Polystyrene foam (EPS)

Polystyrene foam (EPS) has a uniform structure, which is represented by closed cells. The material is often confused with foam plastic. From the traditional material polystyrene cladding foam (EPS) is distinguished by its higher strength and the ability to withstand significant loads of a mechanical nature.

The main advantages:

  • easy installation
  • long service life
  • high compressive strength
  • eco-friendliness
  • biological inertness

Individual construction is the main area of application of EPs. The peculiarity of this type of external insulation is that it is used in this area both as an independent material, and as part of other solutions (sandwich panels).

It is suitable for insulation:

  • floors
  • pitched roofs
  • intermediate floors
  • walls
  • facades

As with other types of insulation for the walls outside, it is necessary to exactly follow the technology of installation. Only in this case, the material shows the inherent positive properties - immunity to temperature changes, resistance to bacteria and high humidity - to the full extent.


Fiberglass insulation Widely known as glass wool. The choice in favor of it is dictated, as a rule, a lower price compared to competitors, as well as the convenience of installation work.

The material is produced in two types:

  1. Mats - recommended for use to insulate structures that do not have a vertically acting load (interfloor ceilings, ceilings and pitched roofs)
  2. Boards - more suitable for partitions and walls, that is, places where there is a vertical load

It is suitable for insulation of various buildings and structures: made of wood, concrete, metal.

Disadvantages of the described types of external and internal insulation

Disadvantages of the listed options for keeping warm temperature in the dwelling - no less important point affecting the choice of the buyer. Their knowledge and understanding of the possible detrimental consequences of using the material greatly helps in the choice. So, how to choose insulation for the walls or roof, if we start from the disadvantages? Consider the disadvantages of the described construction materials:

  • Mineral wool 
    The products of some manufacturers contain elements harmful to health, for example, resins, phenol. The latter is able to affect the skin, respiratory organs, eyes. Prevent such exposure helps properly designed ventilation system and thorough insulation of the insulation.
  • Polystyrene foam (EPS) 
    In order to increase fire resistance, manufacturers introduce flame retardants into its structure. These substances prevent the spread of the flame. However, when they burn, they release toxic substances that can cause fatal poisoning.
  • Fiberglass
    Fiberglass has a high risk of subsidence in vertical structures. Especially when insulated from the outside. Increased moisture absorption - another disadvantage of the material, imposing restrictions on its use. In particular, glass wool is not suitable for use in basements and ground floors.