Your siding is the outer shell and protective barrier for what is likely your largest single investment - your home). Additionally, if you were building a new house the exterior siding, trim, soffit, fascia and gutters are generally one of the top 5 most expensive components of building a new home. Generally speaking, people only reside once in their lifetimes vs. the average American will buy 9 different cars in throughout their life. When you do something once in your lifetime, and it protects your family and your largest investment it makes since to do it right. Plus, residing your home with James Hardie is just about the best investment you can make for your home. The ROI for Hardie crushes just about every other project that you can take on to upgrade your home.   The average James Hardie siding project cost for an entire home will generally fall between $25k and $75k.