The difference between modular and manufactured homes is often in the permanence. For instance modular homes are placed on a permanent foundation; whereas trailers, or manufactured homes are built on a steel chassis with wheels attached. This is so the trailer can be moved or towed.

An insulating material's resistance to conductive heat flow is measured or rated in terms of its thermal resistance or R-value, the higher the R-value, the greater the insulating effectiveness.

Exterior shutters were originally constructed for light control, privacy, security and protection from the elements. Functional shutters hinge on each side of a window or at the top and swing closed when necessary and can also be mounted on tracks applied to the face of the building.