It is about the Curb Appeal!
According to Real Trends, as part of the 2010-11 Remodeling Cost vs. Value Report, Realtors recently rated exterior replacement projects among the most cost-effective home improvement projects, demonstrating that curb appeal remains one of the most important aspects of a home at resale time.
According to the report, replacement projects usually outperform remodel and addition projects in resale value because they are among the least expensive and contribute to curb appeal.
Nine of the top 10 most cost-effective projects nationally in terms of value recouped are exterior replacement projects.
The top two replacement items bring a return on the investment are front door replacement and garage door replacement. Another item that ranks high involve various forms of siding replacement.
Other items mentioned were window replacement, wood deck addition or upgrade and minor Kitchen remodel.
The article mentions various estimates with regard to return on investment and you can read the entire article on the Real Trends Website