Insulation Against Metal Siding

Each layer is composed of polyethylene bubbles that function as an additional thermal barrier that helps stop condensation.

Insulation against metal siding.

Adding insulation behind the steel siding also adds even more the considerable expense and installation issues surrounding the material. You can install fiberglass insulation against the metal roof and prevent moisture problems if you cover it with a vapor barrier. This would require using two or two and a half strips between each stud. Metal siding and insulation do not go hand in hand and you do have a choice on the matter.

Metal siding does not have insulating properties. The stud spacing on our metal buildings are typically 4 or 5 foot on center. Some homeowners choose to use unfaced fiberglass insulation batts. However if the metal siding is just in a garage where you store your car the effort it would take to install insulation may not be worth it.

Therefore if you want heat to stay within the area that has metal siding then insulation is necessary. Many homeowners don t find out just how poor an insulator metal siding can be until after it s installed as well at which time it s difficult to remedy the situation. Taping the insulation together to achieve the on center coverage isn t best option either. A second option for insulating a wall with no sheathing is to use spray foam.

Rolled fiberglass insulation generally comes in rolls of 15 inches up to a maximum of 24 inches wide. Polyurethane foam has the added benefit of sealing air leaks but you shouldn t consider installing it directly against the back of the siding.