Exterior Wall Insulation Thickness

When you are insulating two by four 2x4 and two by six 2x6 framed exterior walls and want to use fiberglass insulation what thickness is best the question becomes all more critical because of the permanent nature of wall assemblies and wall insulation.

Exterior wall insulation thickness.

An external wall insulation system or ewis is a thermally insulated protective decorative exterior cladding procedure involving the use of expanded polystyrene mineral wool polyurethane foam or phenolic foam topped off with a reinforced cement based mineral or synthetic finish and plaster. Best for interior and exterior walls in cold or humid climates especially for homes with masonry or wood walls. Larger houses or ones with more exterior wall surface area windows and doors will obviously cost more. Window and door jamb depth needs to increased with 2x6 walls.

The total up charge for my hypothetical house would be 1 020. These extension jambs cost 575 in my example. The extra thickness fiberglass insulation added 145 to the cost. Most used when framing the exterior walls of a house.

House wraps and kraft faced insulation are examples of vapor barriers that help control the amount of moisture that passes through the insulation. A deeper wall space on exterior walls provides more room for insulation inside the walls and the opportunity to greatly decrease heat loss through your walls you can increase the thickness of. Once the insulation is in the wall and sealed up with drywall it is not easy to change out.