Sorry--photo of dh and ds, this is from our other mh we started first,can not figure out how to delete it,will blog on this one later,we are restarting on it soon.
As you can see we have two mh projects--both in the 1973-74 age--we were surprised at the different way the floors were constructed.
First photo. After replacing all of the joists and much of the other framing, some dry rot, water damage and a visit from termites. Plus removing old repairs by previous owners that did not fix the problem just made them much worse as they cut joists. So... we are really glad we started from scratch. The way we replaced the floor will be different then the way others would replace the floor in a mobile home. Why? We do not have a furnace(other owners removed it),so we do not need duct work. We are running our water lines inside the MH not under the MH. (which works GREAT,I will blog about this later,but will say my DD was away on Christmas break for a few weeks and temp was 10-20 degrees,electric went out for 4 days and nothing froze and the temp was 55 inside the MH with no heat--yea we really insulated it lol) Ok, we put down a 7/16 inch OSB plywood, then plastic 6 mil heavy duty, then insulated R19, then 3/4 plywood on top a nice sandwich.