Category: Home design and repair

Good table with the various types of concrete and composition described

Original website



Great summary in Popular Mechanics on the different types of flooring – very basic, but informative .

Click link for full article :   The Science of Flooring: DIY Guide – Popular Mechanics.


Flooring Hardness & Stability Chart.

Relative Hardness Chart

Link to site: Highland Hardwoods


Link to site: DocStoc 

Plastic Pipe selection chart

Link to site:  Aquatic Eco-Systems