[jlsch1]

Mfg home on the windows they make mfg home windows with higher strength rating and seal better than a window that you would buy for a traditional home. I have seen the actual testing on the windows and it does work in a new mfg home. You can put traditional windows for a house on mfg home but I would price both out with pros and cons of each.

2 Reasons
1. If there is a fire in the mfg home the mfg doors and windows help reduce fires.
Being sealed better and stronger help reduce amount of oxygen in the mfg home which helps reduce the fire. Does it work probably not.

2. Stronger due to mfg home typically moves alot more than a house. Mfg home windows with be able to handle the flexing better.

Putting fiber cement on a mfg home.
Hardie, Nicihia, and Certainteed all make good products depends on what you want.
You can and depends on if you want 4x8 sheets in RB&B & Sierra or lap siding.
Both are a pain to put up.
They do suggest priming and painting so more maintenance.
Lap siding recommended 1/8" gap with a flashing behind the gap.
Some mfg will allow caulking as a proper installation practice if you have a claim in the future.
1/8" gap looks better and give fiber cement room to flex.
If job done right it will look good.

Once you pull off the vinyl you may want to replace your weatherization barrier.
If you tape all your seams, flash your windows, doors, and penetrations right you should reduce to chance of water leaks inside your home.
You should also see a slight reduction off cold air coming in the home when a cold front comes through.
Remember vinyl siding channels water. If you look on the back of siding it has channels to help move water.
Fiber cement does not have channels, so make sure your weatherization barrier in good shape if not its cheap to replace while got siding off.