Are you use Wordpress theme frameworks already? Why not?
A wordpress theme framework is a theme that is designed to be a flexible foundation that can serve as a parent theme for building child themes. The use of WordPress theme frameworks may ease theme development by reducing the volume of work which may be needed in creating a backbone for your theme (usually by using PHP and WordPress Template Tags).
Theme frameworks also make theme development more accessible, removing the need for programming knowledge.
Here are some free Wordpress theme frameworks: