the only way to install batts over batts is if the second layer were unfaced. you don't install two vapor barriers
in the same building assembly.

can't push batts into cathedral ceiling, if cathedral follows roof line. (is this ceiling vaulted into attic
or does it follow roof line?)

insulation shouldn't be in contact with radiant barrier
either.

fix radiant barrier, air seal between living and attic space then blow over batts.

call insulation companies, get several bids.

best of luck.

It will be really difficult to install insulation above a vaulted area, even blown in. Your best bet would be to turn the attic into an unvented one and use foam over the vault and to create a seal and insulate on the roofline, not the floor/ceiling plane. It won't be the cheapest choice, but it will make the home much more comfortable and energy efficient.

take both energy and Greens advice but definitely call an insulation company. Never call a box store for installation of things like building materials as you already see what happens. Also even though you say you have gable vents if your roof is shot after 15 yrs you may have a ventilation issue which a insulation company can also help with.

Thanks for all the help guys. We had the big box store come out on a whim just to get an idea of the cost and sq ft that would be needed in case we decided to add insulation ourselves.

We were NOT wanting to have them put new insulation on top of the old since is was full of dirt and debris regardless if it were blown in or batt. We have unfaced insulation on the attic floor, not sure what the vertical install on the outside walls are.

We are taking the good advice given and will be looking into getting a reputable insulation company come to give an estimate soon.

The gable vents were put in after the 15yr old roof failed so we are a little more optimistic that this recent roofing job will last longer than the last one.

"vertical install on the outside walls are. "

If these are the attic walls, they do not need any insulation.

I smile every time I read the title
cause it is a small rant.
usually the rants are longer than
the actual problem.

I am curious about the insulation in
verticle walls.
are these exterior walls in the attic?
or are they knee walls..where ceiling changes
height and attic floor is several levels?

if the former..exterior walls..you don't
need insulation
if they are knee walls batt insulation
and foil/foam sheathing to air seal
and reflect heat out of walls.

sorry its so confusing..but houses
are all different. keep shopping insulators
post back & we will advise you as best we can.

best of luck.