Internal wall insulation is the process of adding insulation materials to the interior walls of a structure in order to improve thermal efficiency. Typically, this procedure involves installing rigid insulation boards or applying insulation layers on the walls, then covering them with plasterboard or a different finishing material. Internal insulation helps keep indoor temperatures stable by decreasing heat loss through walls, resulting in warmer winters and cooler summers. Furthermore, it enhances energy efficiency, potentially reducing expenses for heating and cooling. In addition to keeping rooms warm, internal wall insulation also provides soundproofing benefits by minimizing noise transfer within spaces. This improvement enhances both comfort and energy efficiency, while also raising the value of the property.