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How Thick Are Exterior Walls on a House?

However, the standard thickness of icf exterior walls is 12 inches, reducing room sizes and minimizing the home’s square footage. To maintain the original square footage of a building plan, you must increase the overall dimensions of the house, which also impacts the design of the roof and foundation.

How Thick Are Exterior Walls on a House?

Exterior walls serve as the first line of defense against the elements for any house. Knowing how thick these walls should be is an important part of the home building process. Depending on the climate and the type of house being built, exterior wall thickness will vary.

In colder climates, exterior walls may need to be thicker to prevent heat loss and maintain a comfortable indoor temperature. In such climates, walls should be at least 6 inches thick, but can be up to 10 inches. The thicker the wall, the more insulation it will provide. For example, an 8-inch-thick exterior wall can have an R-value of 25, meaning it’s 25 times more resistant to heat transfer than an uninsulated wall.

In warmer climates, exterior walls typically don’t need to be as thick. A wall that is 4 inches thick can provide a decent level of insulation. However, if the house is located in an area that gets a lot of sun exposure, it may be beneficial to use thicker walls in order to keep the interior of the house cooler. In such cases, a 6-inch wall can provide a good level of insulation while still allowing some sunlight to penetrate through.

A home can also benefit from thicker exterior walls if it

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