FIRST YOUNED To Decide What to WARM. SINCE ANY House is A Complex Residential System, And the Insulation of the Walls of the Walls is not to get RID of. So, first of all, you need to warm the room, Floors (Througout the Area), Walls (Both External and Internal Part), The Basement. These Parts of the House Account for, USually ABOUT 60% of all the Heat Loss of the House. This is Due to Large Size and Area of these Elements. In Addition, We Must Not ForGet About the Installation of High -quality Energy -Saving Doors and Windows, Which Willp TO Aivoid the Remaining 40% Heat Loss. The Most Correctly is to Start Insulation from the Roof, Gradully Going Down, Moving to the Facade, Having Finally Leaving the Base Part (Foundation).