Construction Question- Need information?

People make mistakes on installing insulation. The paper side should be inside with the flaps over lapping and some staples to hold in place until the drywall is installed. This will creat a vapor barrier and prevent mold and mildew in the wall. In bath rooms I use plastic over the insulation to help with the vapor barrier and cuts down on drafts. Old house was not built as sealed as house today. So you might what to consider this in your project.

Find the Code for your area and build to that if you expect to sell at some point. Most walls now days require R19 or 6" if using fiberglass and old farm houses are usually 2x4 studs. There may be insulations available that could get you R19.

insulation comes in either rolls (continuous) or batts (4' lengths) in both 16 and 24 inch widths.

batts are easier for one person to apply but u have more seams which should be taped. Either way get insulation that is backed (foil or paper) . Use the flanges of the backing to staple the insulation to the studs or ceiling joists. Fill in any tiny spaces with loose insulation (no backing)

craft faced batt insulation.

It comes in precut lengths for the height of standard walls. You stick it in between the studs. The craft paper has little flaps that can be stapled to the studs to hold it in place.

I am sure there are some videos on YouTube that will show you how.

batts are 92 5/8" long. you need R-13 for 2x4 walls. and you need R-19 for your floors and ceilings. very easy job.