were can I find a download for drawing construction blue prints?

[deluxe roofing]

I need to find out were I can find a down load program for microsoft, to make
Construction ble print drawing?

 

[Mary Sauer]

You need a drawing program. Visio would be good, pricey, but it can do blue
prints. There is a free trial offer
http://office.microsoft.com/en-us/visio/default.aspx