Thermal insulation is the reduction of energy used to heat buildings. There are many ways and possibilities to save the energy. However, the most important way is to insulate a building properly. This can be done with many different materials such as foam, adhesives, foamed polystyrene or mineral wool.

Thermal insulation requires the expenditure of large sums of money, nevertheless the cost savings are immediate. The only disadvantage is the fact, that the expenditure is paid back after a few years.

Modernisation works include: insulation of ceilings, external walls, floors, exchange of windows and heating system, and renewal of a ventilation system. Due to thermal insulation of buildings the costs of heating are significantly decreased. Heat loss is the problem of old buildings, usually improperly designed or constructed. The loss is typical for the buildings dating back to 1960s and 1970s. In consequence, thermal insulation was applied both to prefab concrete block of flats and detached houses. Appropriate thermal insulation reduces heating bills in houses and flats.

Modern houses are totally energy efficient. They are properly insulated, have suitable ventilation systems with heat recovery. Most of detached houses are masonry buildings with suitable energy saving wall barriers , properly insulated with mineral wool or foamed polystyrene.

Foamed polystyrene, stone or fibreglass wool. Mineral wool is known as an excellent heat insulator and sound absorber, it is fire resistant, non-absorbent. It can be used to insulate walls, attics, flat roofs. Mineral wool comes in various slab sizes and with different thickness, and is available in three types: soft, medium soft and hard.