Insulation is one of the most important parts of any home's construction and one that many people forget until after their initial construction is complete. The last thing you will want to do is to have to take out some of the walls to put insulation in before you move your family into the house. However, many people also do not know at what stage of the construction of their homes should they call insulation contractors to get them ready and primed to install all your insulation needs.