How to insulate a house yourself?

Insulating your home is essential if you want to live comfortably and at the same time have lower heating bills and thus make your home environmentally friendly. Many individual investors decide to have thermal insulation done by professionals. But can you do it yourself? It turns out that it is possible. Today we will tell you how to insulate your house step by step: what to pay attention to and what to avoid.

Step one, or preparing the walls for insulation

To begin with, you must ensure that the walls you intend to insulate are even, dry, free of dirt and fungus and that they are load-bearing, i.e. provide good adhesion for the insulation glue. Negligence in preparing the substrate always backfires on us. At the very least, they will make it more difficult to attach the insulation, but in extreme cases, we may end up with mouldy walls or plates that peel off.

Step two, or with what and how to insulate.

The currently applied insulation technologies are based on two types of thermal insulation materials – foamed polystyrene and mineral wool. In terms of thermal insulation, they have similar properties, but they differ significantly in vapour permeability, flexibility, fire resistance and reaction to chemicals. When insulating external walls of detached houses, in practice, only the requirements for limiting diffusion resistance of the coating determine the use of one of these insulating materials.

Styrofoam, which is most often used for wall insulation, is characterised by low absorbability, but also poor water vapour permeability. This limits the possibility of moisture drainage to the outside, which can sometimes lead to permanent dampness of walls. On the other hand, mineral wool ensures good “breathing” of the wall, but if it gets wet as a result of e.g., flooding, it retains moisture for a long time, at the same time reducing its heat-protective properties.

Step three, or attaching foamed polystyrene panels

After applying the appropriate amount of adhesive mortar, graphite or white polystyrene foam is applied to the primer-protected wall. To obtain an even plane, each panel should be pressed properly. Styrofoam should be glued from the bottom of the base.Step four, or façade finishing

If the scope of construction work specified in the project states that in addition to gluing polystyrene foam, it is necessary to reinforce it with pins, this will be the next step you will have to take. However, before you start driving the mechanical fasteners, wait at least 24 hours from the moment of gluing the last panel.

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