Correctly installed house wrap increases energy-efficiency, prevents mold and wood rot, eliminates air leaks, provides some insulation value, and makes a home healthy and comfortable. You may have seen house wrap on a new home being built. It is typically white and put on before the siding.
What happens if you don't have house wrap?
It is possible for moisture and air leaks to enter through seams, wreaking havoc behind the siding that you may not even notice until significant damage has already occurred. Despite the good qualities of vinyl, it does pay to have extra insurance in the form of house wrap that this home was missing.