When you walk out into a blizzard, what is going to give you the most comfort? Do you grab a coat or a hat? Most of us grab a coat, and rightly so. The wind blows sideways, not from up above (unless it’s a tornado), so wall insulation is a common ‘rookie insulation’ mistake that is VERY common.
Walls Regulate the temperature and comfort of the home. Winds blow sideways and hit the walls of the home first. Almost everything is porous on your walls, including brick, mortar and siding. Winds push the cold through into your home. As an example, this is why you put on a coat when you’re cold, protecting your body (walls). We want to dense pack the walls to stop the penetration and stop the furnace from turning on to keep the home at the same temperature.
Wall Insulation varies in many homes. Above is leakage in a standard mid 60s to early 90s home.
Easily remove horizontal siding including wood siding, steel siding, aluminum siding, vinyl siding.
Air leakage into exterior walls shown with hot attic heat as orange and studding as vertical dark spots.
Brick Walls may be insulated by drilling through every other mortar joint surrounding bricks.
Walls with No insulation seen on cold day.