Insulating with Europerl Perlite is very fast and easy. During the bricklaying, it must be avoided that mortar residues fall into the gap to be insulated. Either wall ½ – 1 m at a time and pour Europerl Perlite into the gap or make the entire wall and fill with Europerl Perlite. Make sure there are no leaks at windows, doors, electrical outlets and wall holes for any gas and fresh air. If there is no gap at the bottom of the window opening, fill up with Europerl Perlite before installing the window.